Use features of RGBDS 1.0.0 (#1204)

- Use single-quoted character literals or `CHARVAL` when you need a character's numeric value; using strings as numbers is deprecated - Use `?` to silence a node in warning/error location backtraces - Use `===` and `!==` instead of `STRCMP`, and `++` instead of `STRCAT` - Use `__SCOPE__` instead of checking for `..` and `.` separately - Use `#string` instead of `"{string}"` - All programs (rgbasm, rgblink, rgbfix, rgbgfx) support `-W` warnings - `rgbgfx --colors dmg` is short for `rgbgfx --colors dmg=e4`
2026-03-21 17:45:29 -05:00 · 2025-11-12 15:43:54 -05:00 · 2025-11-12 15:43:54 -05:00 · a55bc33d67
commit a55bc33d67
parent b91ba4fe9b
132 changed files with 829 additions and 828 deletions
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@ -16,7 +16,7 @@ jobs:
        uses: actions/checkout@master
        with:
          path: rgbds
-          ref: v0.9.3
+          ref: v1.0.0
          repository: gbdev/rgbds

      - name: Install rgbds
--- a/.rgbds-version
+++ b/.rgbds-version
@ -1 +1 @@
-0.9.3
+1.0.0
--- a/FAQ.md
+++ b/FAQ.md
@ -41,15 +41,15 @@ You need to install `gcc`. If you're using Cygwin, re-run its setup, and at "Sel

 ### "ERROR: `UNION` already defined"

-Download [**rgbds 0.9.3**][rgbds] or newer. Older versions will not work.
+Download [**rgbds 1.0.0**][rgbds] or newer. Older versions will not work.

 ### "ERROR: Macro not defined"

-Download [**rgbds 0.9.3**][rgbds] or newer. Older versions will not work.
+Download [**rgbds 1.0.0**][rgbds] or newer. Older versions will not work.

 ### "Expression must be 8-bit"

-Download [**rgbds 0.9.3**][rgbds] or newer. Older versions will not work.
+Download [**rgbds 1.0.0**][rgbds] or newer. Older versions will not work.

 ### "Segmentation fault" from `rgbgfx`

--- a/INSTALL.md
+++ b/INSTALL.md
@ -42,9 +42,9 @@ Run setup and leave the default settings. At the "**Select Packages**" step, cho

 Double click on the text that says "**Skip**" next to each package to select the most recent version to install.

-Then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#pre-built) for Windows with Cygwin to install **rgbds 0.9.3**.
+Then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#pre-built) for Windows with Cygwin to install **rgbds 1.0.0**.

-**Note:** If you already have an installed rgbds older than 0.9.3, you will need to update to 0.9.3. Ignore this if you have never installed rgbds before. If a version newer than 0.9.3 does not work, try downloading 0.9.3.
+**Note:** If you already have an installed rgbds older than 1.0.0, you will need to update to 1.0.0. Ignore this if you have never installed rgbds before. If a version newer than 1.0.0 does not work, try downloading 1.0.0.

 Now open the **Cygwin terminal** and enter the following commands.

@ -67,7 +67,7 @@ Install [**Homebrew**](https://brew.sh/). Follow the official instructions.

 Open **Terminal** and prepare to enter commands.

-Then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#pre-built) for macOS to install **rgbds 0.9.3**.
+Then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#pre-built) for macOS to install **rgbds 1.0.0**.

 Now you're ready to [build **pokecrystal**](#build-pokecrystal).

@ -84,7 +84,7 @@ To install the software required for **pokecrystal**:
 sudo apt-get install make gcc git
 ```

-Then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#building-from-source) to build **rgbds 0.9.3** from source.
+Then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#building-from-source) to build **rgbds 1.0.0** from source.

 ### OpenSUSE

@ -94,7 +94,7 @@ To install the software required for **pokecrystal**:
 sudo zypper install make gcc git
 ```

-Then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#building-from-source) to build **rgbds 0.9.3** from source.
+Then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#building-from-source) to build **rgbds 1.0.0** from source.

 ### Arch Linux

@ -104,7 +104,7 @@ To install the software required for **pokecrystal**:
 sudo pacman -S make gcc git rgbds
 ```

-If you want to compile and install **rgbds** yourself instead, then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#building-from-source) to build **rgbds 0.9.3** from source.
+If you want to compile and install **rgbds** yourself instead, then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#building-from-source) to build **rgbds 1.0.0** from source.

 ### Termux

@ -120,7 +120,7 @@ To install **rgbds**:
 pkg install rgbds
 ```

-If you want to compile and install **rgbds** yourself instead, then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#building-from-source) to build **rgbds 0.9.3** from source.
+If you want to compile and install **rgbds** yourself instead, then follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#building-from-source) to build **rgbds 1.0.0** from source.

 ### Other distros

@ -131,7 +131,7 @@ If your distro is not listed here, try to find the required software in its repo
 - `git`
 - `rgbds`

-If `rgbds` is not available, you'll need to follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#building-from-source) to build **rgbds 0.9.3** from source.
+If `rgbds` is not available, you'll need to follow the [**rgbds** instructions](https://rgbds.gbdev.io/install#building-from-source) to build **rgbds 1.0.0** from source.

 Now you're ready to [build **pokecrystal**](#build-pokecrystal).

@ -159,12 +159,12 @@ make crystal11

 ### Build with a local rgbds version

-If you have different projects that require different versions of `rgbds`, it might not be convenient to install rgbds 0.9.3 globally. Instead, you can put its files in a directory within pokecrystal, such as `pokecrystal/rgbds-0.9.3/`. Then specify it when you run `make`:
+If you have different projects that require different versions of `rgbds`, it might not be convenient to install rgbds 1.0.0 globally. Instead, you can put its files in a directory within pokecrystal, such as `pokecrystal/rgbds-1.0.0/`. Then specify it when you run `make`:

 ```bash
-make RGBDS=rgbds-0.9.3/
+make RGBDS=rgbds-1.0.0/
 ```

 ```bash
-make RGBDS=rgbds-0.9.3/ crystal11
+make RGBDS=rgbds-1.0.0/ crystal11
 ```
--- a/70
+++ b/70
@ -47,6 +47,11 @@ RGBFIX  ?= $(RGBDS)rgbfix
 RGBGFX  ?= $(RGBDS)rgbgfx
 RGBLINK ?= $(RGBDS)rgblink

+RGBASMFLAGS  ?= -Weverything -Wtruncation=1
+RGBLINKFLAGS ?= -Weverything -Wtruncation=1
+RGBFIXFLAGS  ?= -Weverything
+RGBGFXFLAGS  ?= -Weverything
+

 ### Build targets

@ -104,7 +109,7 @@ tools:
 	$(MAKE) -C tools/


-RGBASMFLAGS = -Q8 -P includes.asm -Weverything -Wtruncation=1
+RGBASMFLAGS += -Q8 -P includes.asm
 # Create a sym/map for debug purposes if `make` run with `DEBUG=1`
 ifeq ($(DEBUG),1)
 RGBASMFLAGS += -E
@ -150,16 +155,17 @@ $(foreach obj, $(pokecrystal11_vc_obj), $(eval $(call DEP,$(obj),$(obj:11_vc.o=.
 endif


-pokecrystal_opt         = -Cjv -t PM_CRYSTAL -i BYTE -n 0 -k 01 -l 0x33 -m MBC3+TIMER+RAM+BATTERY -r 3 -p 0
-pokecrystal11_opt       = -Cjv -t PM_CRYSTAL -i BYTE -n 1 -k 01 -l 0x33 -m MBC3+TIMER+RAM+BATTERY -r 3 -p 0
-pokecrystal_au_opt      = -Cjv -t PM_CRYSTAL -i BYTU -n 0 -k 01 -l 0x33 -m MBC3+TIMER+RAM+BATTERY -r 3 -p 0
-pokecrystal_debug_opt   = -Cjv -t PM_CRYSTAL -i BYTE -n 0 -k 01 -l 0x33 -m MBC3+TIMER+RAM+BATTERY -r 3 -p 0
-pokecrystal11_debug_opt = -Cjv -t PM_CRYSTAL -i BYTE -n 1 -k 01 -l 0x33 -m MBC3+TIMER+RAM+BATTERY -r 3 -p 0
-pokecrystal11_vc_opt    = -Cjv -t PM_CRYSTAL -i BYTE -n 1 -k 01 -l 0x33 -m MBC3+TIMER+RAM+BATTERY -r 3 -p 0
+RGBFIXFLAGS += -Cjv -t PM_CRYSTAL -k 01 -l 0x33 -m MBC3+TIMER+RAM+BATTERY -r 3 -p 0
+pokecrystal.gbc:         RGBFIXFLAGS += -i BYTE -n 0
+pokecrystal11.gbc:       RGBFIXFLAGS += -i BYTE -n 1
+pokecrystal_au.gbc:      RGBFIXFLAGS += -i BYTU -n 0
+pokecrystal_debug.gbc:   RGBFIXFLAGS += -i BYTE -n 0
+pokecrystal11_debug.gbc: RGBFIXFLAGS += -i BYTE -n 1
+pokecrystal11_vc.gbc:    RGBFIXFLAGS += -i BYTE -n 1

 %.gbc: $$(%_obj) layout.link
-	$(RGBLINK) -n $*.sym -m $*.map -l layout.link -o $@ $(filter %.o,$^)
-	$(RGBFIX) $($*_opt) $@
+	$(RGBLINK) $(RGBLINKFLAGS) -l layout.link -n $*.sym -m $*.map -o $@ $(filter %.o,$^)
+	$(RGBFIX) $(RGBFIXFLAGS) $@
 	tools/stadium $@


@ -206,35 +212,35 @@ gfx/pokemon/girafarig/front.animated.tilemap: gfx/pokemon/girafarig/front.2bpp g

 ### Pokemon and trainer sprite rules

-gfx/pokemon/%/back.2bpp: rgbgfx += --columns
+gfx/pokemon/%/back.2bpp: RGBGFXFLAGS += --columns
 gfx/pokemon/%/back.2bpp: gfx/pokemon/%/back.png gfx/pokemon/%/normal.gbcpal
-	$(RGBGFX) $(rgbgfx) --colors gbc:$(word 2,$^) -o $@ $<
+	$(RGBGFX) $(RGBGFXFLAGS) --colors gbc:$(word 2,$^) -o $@ $<
 gfx/pokemon/%/front.2bpp: gfx/pokemon/%/front.png gfx/pokemon/%/normal.gbcpal
-	$(RGBGFX) $(rgbgfx) --colors gbc:$(word 2,$^) -o $@ $<
+	$(RGBGFX) $(RGBGFXFLAGS) --colors gbc:$(word 2,$^) -o $@ $<
 gfx/pokemon/%/normal.gbcpal: gfx/pokemon/%/front.gbcpal gfx/pokemon/%/back.gbcpal
 	tools/gbcpal $(tools/gbcpal) $@ $^

-gfx/trainers/%.2bpp: rgbgfx += --columns
+gfx/trainers/%.2bpp: RGBGFXFLAGS += --columns
 gfx/trainers/%.2bpp: gfx/trainers/%.png gfx/trainers/%.gbcpal
-	$(RGBGFX) $(rgbgfx) --colors gbc:$(word 2,$^) -o $@ $<
+	$(RGBGFX) $(RGBGFXFLAGS) --colors gbc:$(word 2,$^) -o $@ $<

 # Egg does not have a back sprite, so it only uses front.gbcpal
 gfx/pokemon/egg/front.2bpp: gfx/pokemon/egg/front.png gfx/pokemon/egg/front.gbcpal
-gfx/pokemon/egg/front.2bpp: rgbgfx += --colors gbc:$(word 2,$^)
+gfx/pokemon/egg/front.2bpp: RGBGFXFLAGS += --colors gbc:$(word 2,$^)

 # Unown letters share one normal.gbcpal
 unown_pngs := $(wildcard gfx/pokemon/unown_*/front.png) $(wildcard gfx/pokemon/unown_*/back.png)
 $(foreach png, $(unown_pngs),\
 	$(eval $(png:.png=.2bpp): $(png) gfx/pokemon/unown/normal.gbcpal))
-gfx/pokemon/unown_%/back.2bpp: rgbgfx += --colors gbc:$(word 2,$^)
-gfx/pokemon/unown_%/front.2bpp: rgbgfx += --colors gbc:$(word 2,$^)
+gfx/pokemon/unown_%/back.2bpp: RGBGFXFLAGS += --colors gbc:$(word 2,$^)
+gfx/pokemon/unown_%/front.2bpp: RGBGFXFLAGS += --colors gbc:$(word 2,$^)
 gfx/pokemon/unown/normal.gbcpal: $(subst .png,.gbcpal,$(unown_pngs))
 	tools/gbcpal $(tools/gbcpal) $@ $^


 ### Misc file-specific graphics rules

-gfx/pokemon/egg/unused_front.2bpp: rgbgfx += --columns
+gfx/pokemon/egg/unused_front.2bpp: RGBGFXFLAGS += --columns

 gfx/pokemon/spearow/normal.gbcpal: tools/gbcpal += --reverse
 gfx/pokemon/fearow/normal.gbcpal: tools/gbcpal += --reverse
@ -247,8 +253,8 @@ gfx/pokemon/porygon2/normal.gbcpal: tools/gbcpal += --reverse

 gfx/trainers/swimmer_m.gbcpal: tools/gbcpal += --reverse

-gfx/new_game/shrink1.2bpp: rgbgfx += --columns
-gfx/new_game/shrink2.2bpp: rgbgfx += --columns
+gfx/new_game/shrink1.2bpp: RGBGFXFLAGS += --columns
+gfx/new_game/shrink2.2bpp: RGBGFXFLAGS += --columns

 gfx/mail/dragonite.1bpp: tools/gfx += --remove-whitespace
 gfx/mail/large_note.1bpp: tools/gfx += --remove-whitespace
@ -258,17 +264,17 @@ gfx/mail/litebluemail_border.1bpp: tools/gfx += --remove-whitespace

 gfx/pokedex/pokedex.2bpp: tools/gfx += --trim-whitespace
 gfx/pokedex/pokedex_sgb.2bpp: tools/gfx += --trim-whitespace
-gfx/pokedex/question_mark.2bpp: rgbgfx += --columns
+gfx/pokedex/question_mark.2bpp: RGBGFXFLAGS += --columns
 gfx/pokedex/slowpoke.2bpp: tools/gfx += --trim-whitespace

-gfx/pokegear/pokegear.2bpp: rgbgfx += --trim-end 2
+gfx/pokegear/pokegear.2bpp: RGBGFXFLAGS += --trim-end 2
 gfx/pokegear/pokegear_sprites.2bpp: tools/gfx += --trim-whitespace

 gfx/mystery_gift/mystery_gift.2bpp: tools/gfx += --trim-whitespace

 gfx/title/crystal.2bpp: tools/gfx += --interleave --png=$<
 gfx/title/old_fg.2bpp: tools/gfx += --interleave --png=$<
-gfx/title/logo.2bpp: rgbgfx += --trim-end 4
+gfx/title/logo.2bpp: RGBGFXFLAGS += --trim-end 4

 gfx/trade/ball.2bpp: tools/gfx += --remove-whitespace
 gfx/trade/game_boy.2bpp: tools/gfx += --remove-duplicates --preserve=0x23,0x27
@ -299,13 +305,13 @@ gfx/battle_anims/rocks.2bpp: tools/gfx += --remove-whitespace
 gfx/battle_anims/skyattack.2bpp: tools/gfx += --remove-whitespace
 gfx/battle_anims/status.2bpp: tools/gfx += --remove-whitespace

-gfx/player/chris.2bpp: rgbgfx += --columns
-gfx/player/chris_back.2bpp: rgbgfx += --columns
-gfx/player/kris.2bpp: rgbgfx += --columns
-gfx/player/kris_back.2bpp: rgbgfx += --columns
+gfx/player/chris.2bpp: RGBGFXFLAGS += --columns
+gfx/player/chris_back.2bpp: RGBGFXFLAGS += --columns
+gfx/player/kris.2bpp: RGBGFXFLAGS += --columns
+gfx/player/kris_back.2bpp: RGBGFXFLAGS += --columns

-gfx/trainer_card/chris_card.2bpp: rgbgfx += --columns
-gfx/trainer_card/kris_card.2bpp: rgbgfx += --columns
+gfx/trainer_card/chris_card.2bpp: RGBGFXFLAGS += --columns
+gfx/trainer_card/kris_card.2bpp: RGBGFXFLAGS += --columns
 gfx/trainer_card/leaders.2bpp: tools/gfx += --trim-whitespace

 gfx/overworld/chris_fish.2bpp: tools/gfx += --trim-whitespace
@ -313,7 +319,7 @@ gfx/overworld/kris_fish.2bpp: tools/gfx += --trim-whitespace

 gfx/sprites/big_onix.2bpp: tools/gfx += --remove-whitespace --remove-xflip

-gfx/battle/dude.2bpp: rgbgfx += --columns
+gfx/battle/dude.2bpp: RGBGFXFLAGS += --columns

 gfx/font/unused_bold_font.1bpp: tools/gfx += --trim-whitespace

@ -336,12 +342,12 @@ gfx/mobile/stadium2_n64.2bpp: tools/gfx += --trim-whitespace
 ### Catch-all graphics rules

 %.2bpp: %.png
-	$(RGBGFX) --colors dmg=e4 $(rgbgfx) -o $@ $<
+	$(RGBGFX) --colors dmg $(RGBGFXFLAGS) -o $@ $<
 	$(if $(tools/gfx),\
 		tools/gfx $(tools/gfx) -o $@ $@ || $$($(RM) $@ && false))

 %.1bpp: %.png
-	$(RGBGFX) --colors dmg=e4 $(rgbgfx) --depth 1 -o $@ $<
+	$(RGBGFX) --colors dmg $(RGBGFXFLAGS) --depth 1 -o $@ $<
 	$(if $(tools/gfx),\
 		tools/gfx $(tools/gfx) --depth 1 -o $@ $@ || $$($(RM) $@ && false))

--- a/data/events/unown_walls.asm
+++ b/data/events/unown_walls.asm
@ -8,7 +8,7 @@ UnownWalls:
 ; entries correspond to UNOWNWORDS_* constants
 	list_start
 	for x, NUM_UNOWN_WALLS
-		li "{UNOWNWORD_{d:x}}"
+		li #UNOWNWORD_{d:x}
 	endr
 	assert_list_length NUM_UNOWN_WALLS

@ -16,7 +16,7 @@ MenuHeaders_UnownWalls:
 ; entries correspond to UNOWNWORDS_* constants
 	table_width UNOWN_WALL_MENU_HEADER_SIZE
 	for x, NUM_UNOWN_WALLS
-		DEF n = CHARLEN("{UNOWNWORD_{d:x}}")
+		DEF n = CHARLEN(#UNOWNWORD_{d:x})
 		db MENU_BACKUP_TILES ; flags
 		menu_coords 9 - n, 4, 10 + n, 9
 	endr
--- a/data/maps/attributes.asm
+++ b/data/maps/attributes.asm
@ -37,7 +37,7 @@ MACRO connection
 			DEF _tgt = 0
 		endc

-		if !STRCMP("\1", "north")
+		if "\1" === "north"
 			DEF _blk = \3_WIDTH * (\3_HEIGHT - MAP_CONNECTION_PADDING_WIDTH) + _src
 			DEF _map = _tgt
 			DEF _win = (\3_WIDTH + MAP_CONNECTION_PADDING_WIDTH * 2) * \3_HEIGHT + 1
@ -48,7 +48,7 @@ MACRO connection
 				DEF _len = \3_WIDTH
 			endc

-		elif !STRCMP("\1", "south")
+		elif "\1" === "south"
 			DEF _blk = _src
 			DEF _map = (CURRENT_MAP_WIDTH + MAP_CONNECTION_PADDING_WIDTH * 2) * (CURRENT_MAP_HEIGHT + MAP_CONNECTION_PADDING_WIDTH) + _tgt
 			DEF _win = \3_WIDTH + MAP_CONNECTION_PADDING_WIDTH * 2 + 1
@ -59,7 +59,7 @@ MACRO connection
 				DEF _len = \3_WIDTH
 			endc

-		elif !STRCMP("\1", "west")
+		elif "\1" === "west"
 			DEF _blk = (\3_WIDTH * _src) + \3_WIDTH - MAP_CONNECTION_PADDING_WIDTH
 			DEF _map = (CURRENT_MAP_WIDTH + MAP_CONNECTION_PADDING_WIDTH * 2) * _tgt
 			DEF _win = (\3_WIDTH + MAP_CONNECTION_PADDING_WIDTH * 2) * 2 - MAP_CONNECTION_PADDING_WIDTH * 2
@ -70,7 +70,7 @@ MACRO connection
 				DEF _len = \3_HEIGHT
 			endc

-		elif !STRCMP("\1", "east")
+		elif "\1" === "east"
 			DEF _blk = (\3_WIDTH * _src)
 			DEF _map = (CURRENT_MAP_WIDTH + MAP_CONNECTION_PADDING_WIDTH * 2) * _tgt + CURRENT_MAP_WIDTH + MAP_CONNECTION_PADDING_WIDTH
 			DEF _win = \3_WIDTH + MAP_CONNECTION_PADDING_WIDTH * 2 + 1
--- a/data/pokemon/unown_words.asm
+++ b/data/pokemon/unown_words.asm
@ -1,6 +1,6 @@
 MACRO unownword
 for n, CHARLEN(\1)
-	db STRCHAR(\1, n) - "A" + FIRST_UNOWN_CHAR
+	db CHARVAL(STRCHAR(\1, n)) - 'A' + FIRST_UNOWN_CHAR
 endr
 	db -1
 ENDM
--- a/engine/battle/anim_hp_bar.asm
+++ b/engine/battle/anim_hp_bar.asm
@ -257,7 +257,7 @@ HPBarAnim_UpdateHPRemaining:
 .loaded_de
 	push hl
 	add hl, de
-	ld a, " "
+	ld a, ' '
 	ld [hli], a
 	ld [hli], a
 	ld [hld], a
--- a/engine/battle/battle_transition.asm
+++ b/engine/battle/battle_transition.asm
@ -5,8 +5,8 @@ DEF BATTLETRANSITION_NO_CAVE          EQU $10
 DEF BATTLETRANSITION_NO_CAVE_STRONGER EQU $18
 DEF BATTLETRANSITION_FINISH           EQU $20

-DEF BATTLETRANSITION_SQUARE EQU "8" ; $fe
-DEF BATTLETRANSITION_BLACK  EQU "9" ; $ff
+DEF BATTLETRANSITION_SQUARE EQU '8' ; $fe
+DEF BATTLETRANSITION_BLACK  EQU '9' ; $ff

 DoBattleTransition:
 	call .InitGFX
--- a/engine/battle/core.asm
+++ b/engine/battle/core.asm
@ -4685,11 +4685,11 @@ PrintPlayerHUD:
 	ld a, TEMPMON
 	ld [wMonType], a
 	callfar GetGender
-	ld a, " "
+	ld a, ' '
 	jr c, .got_gender_char
-	ld a, "♂"
+	ld a, '♂'
 	jr nz, .got_gender_char
-	ld a, "♀"
+	ld a, '♀'

 .got_gender_char
 	hlcoord 17, 8
@ -4703,7 +4703,7 @@ PrintPlayerHUD:
 	pop bc
 	ret nz
 	ld a, b
-	cp " "
+	cp ' '
 	jr nz, .copy_level ; male or female
 	dec hl ; genderless

@ -4761,11 +4761,11 @@ DrawEnemyHUD:
 	ld a, TEMPMON
 	ld [wMonType], a
 	callfar GetGender
-	ld a, " "
+	ld a, ' '
 	jr c, .got_gender
-	ld a, "♂"
+	ld a, '♂'
 	jr nz, .got_gender
-	ld a, "♀"
+	ld a, '♀'

 .got_gender
 	hlcoord 9, 1
@ -4780,7 +4780,7 @@ DrawEnemyHUD:
 	pop bc
 	jr nz, .skip_level
 	ld a, b
-	cp " "
+	cp ' '
 	jr nz, .print_level
 	dec hl
 .print_level
@ -5443,7 +5443,7 @@ MoveSelectionScreen:
 	ld bc, SCREEN_WIDTH
 	dec a
 	call AddNTimes
-	ld [hl], "▷"
+	ld [hl], '▷'

 .interpret_joypad
 	ld a, $1
@ -5694,7 +5694,7 @@ MoveInfoBox:
 	call PlaceString

 	hlcoord 7, 11
-	ld [hl], "/"
+	ld [hl], '/'

 	callfar UpdateMoveData
 	ld a, [wPlayerMoveStruct + MOVE_ANIM]
@ -5724,7 +5724,7 @@ MoveInfoBox:
 	pop hl
 	inc hl
 	inc hl
-	ld [hl], "/"
+	ld [hl], '/'
 	inc hl
 	ld de, wNamedObjectIndex
 	lb bc, 1, 2
@ -8492,7 +8492,7 @@ ReadAndPrintLinkBattleRecord:
 	ld de, wLinkBattleRecordName
 	ld bc, NAME_LENGTH - 1
 	call CopyBytes
-	ld a, "@"
+	ld a, '@'
 	ld [de], a
 	inc de ; wLinkBattleRecordWins
 	ld bc, 6
@ -8958,7 +8958,7 @@ InitBattleDisplay:

 	ld hl, wDecompressScratch
 	ld bc, TILEMAP_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill

 	ld de, wDecompressScratch
--- a/engine/battle/effect_commands.asm
+++ b/engine/battle/effect_commands.asm
@ -4605,7 +4605,7 @@ BattleCommand_StatDownFailText:

 GetStatName:
 	ld hl, StatNames
-	ld c, "@"
+	ld c, '@'
 .CheckName:
 	dec b
 	jr z, .Copy
--- a/engine/battle/getgen1trainerclassname.asm
+++ b/engine/battle/getgen1trainerclassname.asm
@ -14,7 +14,7 @@ GetGen1TrainerClassName: ; unreferenced
 	ld a, [hli]
 	ld [de], a
 	inc de
-	cp "@"
+	cp '@'
 	jr nz, .copy
 	ret

--- a/engine/battle/read_trainer_party.asm
+++ b/engine/battle/read_trainer_party.asm
@ -51,7 +51,7 @@ ReadTrainerParty:

 .skip_name
 	ld a, [hli]
-	cp "@"
+	cp '@'
 	jr nz, .skip_name

 	ld a, [hli]
--- a/engine/battle/trainer_huds.asm
+++ b/engine/battle/trainer_huds.asm
@ -246,9 +246,9 @@ _ShowLinkBattleParticipants:
 	ld de, wOTPlayerName
 	call PlaceString
 	hlcoord 9, 8
-	ld a, "<BOLD_V>"
+	ld a, '<BOLD_V>'
 	ld [hli], a
-	ld [hl], "<BOLD_S>"
+	ld [hl], '<BOLD_S>'
 	farcall LinkBattle_TrainerHuds ; no need to farcall
 	ld b, SCGB_DIPLOMA
 	call GetSGBLayout
--- a/engine/debug/color_picker.asm
+++ b/engine/debug/color_picker.asm
@ -1010,7 +1010,7 @@ DebugColor_PlaceCursor:
 	hlcoord 1, 11
 	ld bc, 2 * SCREEN_WIDTH
 	call AddNTimes
-	ld [hl], "▶"
+	ld [hl], '▶'

 .place_cursor
 	ld a, [wDebugColorCurColor]
@ -1022,7 +1022,7 @@ DebugColor_PlaceCursor:
 .light
 	hlcoord 10, 0
 .place
-	ld [hl], "▶"
+	ld [hl], '▶'

 	ld b, $70 ; initial tile id
 	ld c, 5 ; initial palette
--- a/engine/debug/debug_room.asm
+++ b/engine/debug/debug_room.asm
@ -41,7 +41,7 @@ _DebugRoom:
 .loop
 	ld hl, wTilemap
 	ld bc, wTilemapEnd - wTilemap
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	call DebugRoom_PrintStackBottomTop
 	call DebugRoom_PrintWindowStackBottomTop
@ -429,9 +429,9 @@ DebugRoom_PrintGender:
 	ld a, [sCrystalData + (wPlayerGender - wCrystalData)]
 	call CloseSRAM
 	or a
-	ld a, "♂"
+	ld a, '♂'
 	jr z, .ok
-	ld a, "♀"
+	ld a, '♀'
 .ok
 	hlcoord 19, 1
 	ld [hl], a
@ -591,7 +591,7 @@ DebugRoom_EditPagedValues:
 	call DebugRoom_InitializePagedValues
 	xor a
 	call DebugRoom_PrintPage
-	ld a, "▶"
+	ld a, '▶'
 	call DebugRoom_ShowHideCursor
 	xor a
 	ldh [hJoyLast], a
@ -717,7 +717,7 @@ DebugRoom_NextPage:
 	dec a
 	ld [wDebugRoomCurValue], a
 .skip
-	ld a, "▶"
+	ld a, '▶'
 	call DebugRoom_ShowHideCursor
 	ret

@ -739,12 +739,12 @@ DebugRoom_PrevPage:
 	dec a
 	ld [wDebugRoomCurValue], a
 .skip
-	ld a, "▶"
+	ld a, '▶'
 	call DebugRoom_ShowHideCursor
 	ret

 DebugRoom_NextPagedValue:
-	ld a, " "
+	ld a, ' '
 	call DebugRoom_ShowHideCursor
 	ld a, [wDebugRoomCurPage]
 	call DebugRoom_GetNthPagePointer
@ -758,12 +758,12 @@ DebugRoom_NextPagedValue:

 DebugRoom_UpdateValueCursor:
 	ld [wDebugRoomCurValue], a
-	ld a, "▶"
+	ld a, '▶'
 	call DebugRoom_ShowHideCursor
 	ret

 DebugRoom_PrevPagedValue:
-	ld a, " "
+	ld a, ' '
 	call DebugRoom_ShowHideCursor
 	ld a, [wDebugRoomCurValue]
 	or a ; pre-decremented value > 0?
@ -887,7 +887,7 @@ DebugRoom_InitializePagedValues:
 DebugRoom_PrintPage:
 	push af
 	hlcoord 10, 17
-	add "1"
+	add '1'
 	ld [hl], a
 	hlcoord 1, 1
 	lb bc, SCREEN_HEIGHT - 2, SCREEN_WIDTH - 2
@ -978,7 +978,7 @@ DebugRoom_PrintPagedValue:
 .hex
 	ld c, 1
 	call PrintHexNumber
-	ld [hl], "H"
+	ld [hl], 'H'
 	inc hl
 .printed
 	ld bc, 6
@ -1403,12 +1403,12 @@ DebugRoomMenu_RTCEdit_UpdateClock:
 	ld de, wDebugRoomRTCCurHour
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
 	call PrintNum
-	ld [hl], ":"
+	ld [hl], ':'
 	inc hl
 	ld de, wDebugRoomRTCCurMin
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
 	call PrintNum
-	ld [hl], ":"
+	ld [hl], ':'
 	inc hl
 	ld de, wDebugRoomRTCCurSec
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
@ -1593,7 +1593,7 @@ ComputeROMChecksum:
 	hlcoord 16, 16
 	ld c, 1
 	call PrintHexNumber
-	ld [hl], "h"
+	ld [hl], 'h'
 	pop de
 	pop bc
 	call ComputeROMXChecksum
@ -1661,7 +1661,7 @@ DebugRoomMenu_ROMChecksum:
 	ld de, wDebugRoomROMChecksum
 	ld c, 2
 	call PrintHexNumber
-	ld [hl], "h"
+	ld [hl], 'h'
 	call DebugRoom_JoyWaitABSelect
 	call CloseWindow
 	ret
@ -1701,7 +1701,7 @@ DebugRoomMenu_BTBugPoke:
 	ld de, sIsBugMon
 	ld c, 1
 	call PrintHexNumber
-	ld [hl], "h"
+	ld [hl], 'h'
 	call YesNoBox
 	jr c, .done
 	xor a
--- a/engine/events/battle_tower/battle_tower.asm
+++ b/engine/events/battle_tower/battle_tower.asm
@ -244,9 +244,9 @@ RunBattleTowerTrainer:
 	call CloseSRAM
 	ld hl, wStringBuffer3
 	ld a, [wNrOfBeatenBattleTowerTrainers]
-	add "1"
+	add '1'
 	ld [hli], a
-	ld a, "@"
+	ld a, '@'
 	ld [hl], a

 .lost
@ -308,7 +308,7 @@ ReadBTTrainerParty:

 .skip_mon_3
 ; Add the terminator character to each of these names
-	ld a, "@"
+	ld a, '@'
 	ld [wBT_OTTempMon1Name + MON_NAME_LENGTH - 1], a
 	ld [wBT_OTTempMon2Name + MON_NAME_LENGTH - 1], a
 	ld [wBT_OTTempMon3Name + MON_NAME_LENGTH - 1], a
@ -329,7 +329,7 @@ ReadBTTrainerParty:
 	ld de, wOTPlayerName
 	ld bc, NAME_LENGTH - 1
 	call CopyBytes
-	ld a, "@"
+	ld a, '@'
 	ld [de], a

 	ld hl, wBT_OTTempTrainerClass
@ -703,39 +703,39 @@ Function1704e1:

 .DrawBorder:
 	hlcoord 0, 4
-	ld a, "┌"
+	ld a, '┌'
 	ld [hli], a
 	ld c, SCREEN_WIDTH - 2
 .top_border_loop
-	ld a, "─"
+	ld a, '─'
 	ld [hli], a
 	dec c
 	jr nz, .top_border_loop
-	ld a, "┐"
+	ld a, '┐'
 	ld [hli], a
 	ld de, SCREEN_WIDTH
 	ld c, 12
 .left_border_loop
-	ld a, "│"
+	ld a, '│'
 	ld [hl], a
 	add hl, de
 	dec c
 	jr nz, .left_border_loop
-	ld a, "└"
+	ld a, '└'
 	ld [hli], a
 	ld c, SCREEN_WIDTH - 2
 .bottom_border_loop
-	ld a, "─"
+	ld a, '─'
 	ld [hli], a
 	dec c
 	jr nz, .bottom_border_loop
-	ld a, "┘"
+	ld a, '┘'
 	ld [hl], a
 	ld de, -SCREEN_WIDTH
 	add hl, de
 	ld c, 12
 .right_border_loop
-	ld a, "│"
+	ld a, '│'
 	ld [hl], a
 	add hl, de
 	dec c
@ -831,7 +831,7 @@ Function1704e1:
 	and a
 	jr z, .nope
 	hlcoord 18, 5
-	ld a, "▲"
+	ld a, '▲'
 	ld [hl], a

 .nope
@ -839,7 +839,7 @@ Function1704e1:
 	cp 60
 	ret z
 	hlcoord 18, 16
-	ld a, "▼"
+	ld a, '▼'
 	ld [hl], a
 	ret

@ -1281,7 +1281,7 @@ BattleTowerAction_EggTicket:
 rept 4
 	dec hl
 endr
-	ld a, "@"
+	ld a, '@'
 	ld [hli], a
 	ld [hli], a
 	pop hl
--- a/engine/events/battle_tower/rules.asm
+++ b/engine/events/battle_tower/rules.asm
@ -26,9 +26,9 @@ CheckForMobileBattleRules:

 _CheckForBattleTowerRules:
 	ld hl, wStringBuffer2
-	ld [hl], "3"
+	ld [hl], '3'
 	inc hl
-	ld [hl], "@"
+	ld [hl], '@'
 	ld de, .PointerTables
 	call BattleTower_ExecuteJumptable
 	ret z
--- a/engine/events/buena.asm
+++ b/engine/events/buena.asm
@ -194,7 +194,7 @@ PrintBlueCardBalance:
 	ld h, b
 	ld l, c
 	inc hl
-	ld a, " "
+	ld a, ' '
 	ld [hli], a
 	ld [hld], a
 	pop de
@ -283,7 +283,7 @@ endr
 	call Buena_GetPrize
 	inc hl
 	ld a, [hl]
-	ld c, "0"
+	ld c, '0'
 	add c
 	ld [de], a
 	ret
--- a/engine/events/bug_contest/judging.asm
+++ b/engine/events/bug_contest/judging.asm
@ -96,10 +96,10 @@ LoadContestantName:
 ; Delete the trailing terminator and replace it with a space.
 .next
 	ld a, [hli]
-	cp "@"
+	cp '@'
 	jr nz, .next
 	dec hl
-	ld [hl], " "
+	ld [hl], ' '
 	inc hl
 	ld d, h
 	ld e, l
--- a/engine/events/diploma.asm
+++ b/engine/events/diploma.asm
@ -52,7 +52,7 @@ PlaceDiplomaOnScreen:
 PrintDiplomaPage2:
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	ld hl, DiplomaPage2Tilemap
 	decoord 0, 0
--- a/engine/events/halloffame.asm
+++ b/engine/events/halloffame.asm
@ -238,7 +238,7 @@ AnimateHOFMonEntrance:
 	predef GetUnownLetter
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	ld de, vTiles2 tile $31
 	predef GetMonBackpic
@ -262,7 +262,7 @@ AnimateHOFMonEntrance:
 	ld [wBoxAlignment], a
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 6, 5
 	call _PrepMonFrontpic
@ -449,11 +449,11 @@ DisplayHOFMon:
 	ld de, wStringBuffer2
 	ld bc, MON_NAME_LENGTH - 1
 	call CopyBytes
-	ld a, "@"
+	ld a, '@'
 	ld [wStringBuffer2 + MON_NAME_LENGTH - 1], a
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 0, 0
 	lb bc, 3, SCREEN_WIDTH - 2
@ -474,9 +474,9 @@ DisplayHOFMon:
 	cp EGG
 	jr z, .print_id_no
 	hlcoord 1, 13
-	ld a, "№"
+	ld a, '№'
 	ld [hli], a
-	ld [hl], "<DOT>"
+	ld [hl], '<DOT>'
 	hlcoord 3, 13
 	ld de, wTextDecimalByte
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 3
@ -487,17 +487,17 @@ DisplayHOFMon:
 	ld a, TEMPMON
 	ld [wMonType], a
 	farcall GetGender
-	ld a, " "
+	ld a, ' '
 	jr c, .got_gender
-	ld a, "♂"
+	ld a, '♂'
 	jr nz, .got_gender
-	ld a, "♀"
+	ld a, '♀'

 .got_gender
 	hlcoord 18, 13
 	ld [hli], a
 	hlcoord 8, 14
-	ld a, "/"
+	ld a, '/'
 	ld [hli], a
 	ld de, wStringBuffer2
 	call PlaceString
@ -506,11 +506,11 @@ DisplayHOFMon:

 .print_id_no
 	hlcoord 7, 16
-	ld a, "<ID>"
+	ld a, '<ID>'
 	ld [hli], a
-	ld a, "№"
+	ld a, '№'
 	ld [hli], a
-	ld [hl], "/"
+	ld [hl], '/'
 	hlcoord 10, 16
 	ld de, wTempMonID
 	lb bc, PRINTNUM_LEADINGZEROS | 2, 5
@ -525,7 +525,7 @@ HOF_AnimatePlayerPic:
 	call Request2bpp
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	farcall GetPlayerBackpic
 	ld a, $31
@ -549,7 +549,7 @@ HOF_AnimatePlayerPic:
 	ld [wBoxAlignment], a
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	farcall HOF_LoadTrainerFrontpic
 	xor a
@ -576,11 +576,11 @@ HOF_AnimatePlayerPic:
 	ld de, wPlayerName
 	call PlaceString
 	hlcoord 1, 6
-	ld a, "<ID>"
+	ld a, '<ID>'
 	ld [hli], a
-	ld a, "№"
+	ld a, '№'
 	ld [hli], a
-	ld [hl], "/"
+	ld [hl], '/'
 	hlcoord 4, 6
 	ld de, wPlayerID
 	lb bc, PRINTNUM_LEADINGZEROS | 2, 5
--- a/engine/events/kurt.asm
+++ b/engine/events/kurt.asm
@ -165,7 +165,7 @@ PlaceApricornQuantity:
 	call MenuBoxCoord2Tile
 	ld de, 2 * SCREEN_WIDTH + 10
 	add hl, de
-	ld [hl], "×"
+	ld [hl], '×'
 	inc hl
 	ld de, wItemQuantityChange
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
--- a/engine/events/lucky_number.asm
+++ b/engine/events/lucky_number.asm
@ -211,6 +211,6 @@ PrintTodaysLuckyNumber:
 	ld de, wLuckyIDNumber
 	lb bc, PRINTNUM_LEADINGZEROS | 2, 5
 	call PrintNum
-	ld a, "@"
+	ld a, '@'
 	ld [wStringBuffer3 + 5], a
 	ret
--- a/engine/events/magikarp.asm
+++ b/engine/events/magikarp.asm
@ -76,7 +76,7 @@ CheckMagikarpLength:
 	text_end

 Magikarp_LoadFeetInchesChars:
-	ld hl, vTiles2 tile "′" ; $6e
+	ld hl, vTiles2 tile '′' ; $6e
 	ld de, .feetinchchars
 	lb bc, BANK(.feetinchchars), 2
 	call Request2bpp
@ -91,14 +91,14 @@ PrintMagikarpLength:
 	ld de, wMagikarpLength
 	lb bc, PRINTNUM_LEFTALIGN | 1, 2
 	call PrintNum
-	ld [hl], "′"
+	ld [hl], '′'
 	inc hl
 	ld de, wMagikarpLength + 1
 	lb bc, PRINTNUM_LEFTALIGN | 1, 2
 	call PrintNum
-	ld [hl], "″"
+	ld [hl], '″'
 	inc hl
-	ld [hl], "@"
+	ld [hl], '@'
 	ret

 CalcMagikarpLength:
--- a/engine/events/map_name_sign.asm
+++ b/engine/events/map_name_sign.asm
@ -161,9 +161,9 @@ PlaceMapNameCenterAlign:
 	ld hl, wStringBuffer1
 .loop
 	ld a, [hli]
-	cp "@"
+	cp '@'
 	jr z, .stop
-	cp "<WBR>"
+	cp '<WBR>'
 	jr z, .loop
 	inc c
 	jr .loop
--- a/engine/events/mom.asm
+++ b/engine/events/mom.asm
@ -461,7 +461,7 @@ Mom_WithdrawDepositMenuJoypad:
 	ldh [hBGMapMode], a
 	hlcoord 12, 6
 	ld bc, 7
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 12, 6
 	ld de, wStringBuffer2
@ -475,7 +475,7 @@ Mom_WithdrawDepositMenuJoypad:
 	ld c, a
 	ld b, 0
 	add hl, bc
-	ld [hl], " "
+	ld [hl], ' '

 .skip
 	call WaitBGMap
--- a/engine/events/name_rater.asm
+++ b/engine/events/name_rater.asm
@ -116,9 +116,9 @@ IsNewNameEmpty:
 	ld c, MON_NAME_LENGTH - 1
 .loop
 	ld a, [hli]
-	cp "@"
+	cp '@'
 	jr z, .terminator
-	cp " "
+	cp ' '
 	jr nz, .nonspace
 	dec c
 	jr nz, .loop
@ -149,7 +149,7 @@ CompareNewToOld:
 	ld de, wStringBuffer2
 .loop
 	ld a, [de]
-	cp "@"
+	cp '@'
 	jr z, .terminator
 	cp [hl]
 	jr nz, .different
@ -170,7 +170,7 @@ GetNicknamenameLength:
 	ld c, 0
 .loop
 	ld a, [hli]
-	cp "@"
+	cp '@'
 	ret z
 	inc c
 	ld a, c
--- a/engine/events/npc_trade.asm
+++ b/engine/events/npc_trade.asm
@ -316,14 +316,14 @@ CopyTradeName:
 Trade_CopyFourCharString: ; unreferenced
 	ld bc, 4
 	call CopyBytes
-	ld a, "@"
+	ld a, '@'
 	ld [de], a
 	ret

 Trade_CopyThreeCharString: ; unreferenced
 	ld bc, 3
 	call CopyBytes
-	ld a, "@"
+	ld a, '@'
 	ld [de], a
 	ret

@ -363,7 +363,7 @@ GetTradeMonNames:
 	ld hl, wStringBuffer1
 .loop
 	ld a, [hli]
-	cp "@"
+	cp '@'
 	jr nz, .loop

 	dec hl
@ -375,13 +375,13 @@ GetTradeMonNames:
 	and a ; TRADE_GENDER_EITHER
 	ret z
 	cp TRADE_GENDER_MALE
-	ld a, "♂"
+	ld a, '♂'
 	jr z, .done
 	; TRADE_GENDER_FEMALE
-	ld a, "♀"
+	ld a, '♀'
 .done
 	ld [hli], a
-	ld [hl], "@"
+	ld [hl], '@'
 	ret

 INCLUDE "data/events/npc_trades.asm"
--- a/engine/events/poke_seer.asm
+++ b/engine/events/poke_seer.asm
@ -146,7 +146,7 @@ GetCaughtName:
 	ret

 GetCaughtLevel:
-	ld a, "@"
+	ld a, '@'
 	ld hl, wSeerCaughtLevelString
 	ld bc, 4
 	call ByteFill
@ -265,7 +265,7 @@ GetCaughtOT:

 .got_grammar
 	ld de, wSeerOTGrammar
-	ld a, "@"
+	ld a, '@'
 	ld [de], a
 	ret

--- a/engine/events/print_unown.asm
+++ b/engine/events/print_unown.asm
@ -1,5 +1,5 @@
-DEF UNOWNSTAMP_BOLD_A EQU "♂" ; $ef
-DEF UNOWNSTAMP_BOLD_B EQU "♀" ; $f5
+DEF UNOWNSTAMP_BOLD_A EQU '♂' ; $ef
+DEF UNOWNSTAMP_BOLD_B EQU '♀' ; $f5

 _UnownPrinter:
 	ld a, [wUnownDex]
@ -226,7 +226,7 @@ INCBIN "gfx/printer/bold_b.1bpp"
 PlaceUnownPrinterFrontpic:
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 7, 11
 	ld a, $31
--- a/engine/events/prof_oaks_pc.asm
+++ b/engine/events/prof_oaks_pc.asm
@ -66,7 +66,7 @@ Rate:

 .UpdateRatingBuffer:
 	push hl
-	ld a, "@"
+	ld a, '@'
 	ld bc, ITEM_NAME_LENGTH
 	call ByteFill
 	pop hl
--- a/engine/events/shuckle.asm
+++ b/engine/events/shuckle.asm
@ -101,7 +101,7 @@ ReturnShuckie:
 	ld a, [de]
 	cp [hl]
 	jr nz, .DontReturn
-	cp "@"
+	cp '@'
 	jr z, .done
 	inc de
 	inc hl
--- a/engine/events/unown_walls.asm
+++ b/engine/events/unown_walls.asm
@ -154,9 +154,9 @@ INCLUDE "data/events/unown_walls.asm"

 _DisplayUnownWords_FillAttr:
 	ld a, [de]
-	cp "@"
+	cp '@'
 	ret z
-	cp "Y"
+	cp 'Y'
 	ld a, OAM_BANK1 | PAL_BG_BROWN
 	jr c, .got_pal
 	ld a, PAL_BG_BROWN
@ -184,7 +184,7 @@ _DisplayUnownWords_CopyWord:
 	push de
 .word_loop
 	ld a, [de]
-	cp "@"
+	cp '@'
 	jr z, .word_done
 	ld c, a
 	call .ConvertChar
@ -201,11 +201,11 @@ _DisplayUnownWords_CopyWord:
 .ConvertChar:
 	push hl
 	ld a, c
-	cp "Y"
+	cp 'Y'
 	jr z, .YChar
-	cp "Z"
+	cp 'Z'
 	jr z, .ZChar
-	cp "-"
+	cp '-'
 	jr z, .DashChar
 	ld [hli], a
 	inc a
--- a/engine/games/card_flip.asm
+++ b/engine/games/card_flip.asm
@ -1,5 +1,5 @@
-DEF CARDFLIP_LIGHT_OFF EQU "♂" ; $ef
-DEF CARDFLIP_LIGHT_ON  EQU "♀" ; $f5
+DEF CARDFLIP_LIGHT_OFF EQU '♂' ; $ef
+DEF CARDFLIP_LIGHT_ON  EQU '♀' ; $f5

 MemoryGameGFX:
 ; Graphics for an unused Game Corner
@ -580,11 +580,11 @@ CardFlip_CopyOAM:
 CardFlip_ShiftDigitsUpOnePixel:
 ; The top rows of digits 1-9 become the bottom rows of 0-8,
 ; so this routine relies on the top rows being blank.
-	ld de, vTiles0 tile "0"
-	ld hl, vTiles0 tile "0" + 2
+	ld de, vTiles0 tile '0'
+	ld hl, vTiles0 tile '0' + 2
 	ld bc, 10 tiles - 2
 	call CopyBytes
-	ld hl, vTiles0 tile "9" + 1 tiles - 2
+	ld hl, vTiles0 tile '9' + 1 tiles - 2
 	xor a
 	ld [hli], a
 	ld [hl], a
--- a/engine/games/memory_game.asm
+++ b/engine/games/memory_game.asm
@ -120,7 +120,7 @@ endr
 .CheckTriesRemaining:
 	ld a, [wMemoryGameNumberTriesRemaining]
 	hlcoord 17, 0
-	add "0"
+	add '0'
 	ld [hl], a
 	ld hl, wMemoryGameNumberTriesRemaining
 	ld a, [hl]
--- a/engine/games/slot_machine.asm
+++ b/engine/games/slot_machine.asm
@ -110,7 +110,7 @@ _SlotMachine:
 	call DisableLCD
 	hlbgcoord 0, 0
 	ld bc, vBGMap1 - vBGMap0
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	ld b, SCGB_SLOT_MACHINE
 	call GetSGBLayout
@ -242,13 +242,13 @@ DebugPrintSlotBias: ; unreferenced
 	daa
 	ld e, a
 	and $f
-	add "0"
+	add '0'
 	hlcoord 1, 0
 	ld [hl], a
 	ld a, e
 	swap a
 	and $f
-	add "0"
+	add '0'
 	hlcoord 0, 0
 	ld [hl], a
 	ret
@ -1914,7 +1914,7 @@ Slots_PayoutText:
 	inc a
 	ldcoord_a 3, 14
 	hlcoord 18, 17
-	ld [hl], "▼"
+	ld [hl], '▼'
 	ld hl, .SlotsLinedUpText
 rept 4
 	inc bc
--- a/engine/gfx/dma_transfer.asm
+++ b/engine/gfx/dma_transfer.asm
@ -406,7 +406,7 @@ _LoadHDMAParameters:
 	ret

 PadTilemapForHDMATransfer:
-	ld c, " "
+	ld c, ' '
 	jr PadMapForHDMATransfer

 PadAttrmapForHDMATransfer:
--- a/engine/gfx/load_font.asm
+++ b/engine/gfx/load_font.asm
@ -18,47 +18,47 @@ Get2bppOptionalHDMA: ; unreferenced
 _LoadStandardFont::
 	ld de, Font
 	ld hl, vTiles1
-	lb bc, BANK(Font), 128 ; "A" to "9"
+	lb bc, BANK(Font), 128 ; 'A' to '9'
 	ldh a, [rLCDC]
 	bit B_LCDC_ENABLE, a
 	jp z, Copy1bpp

 	ld de, Font
 	ld hl, vTiles1
-	lb bc, BANK(Font), 32 ; "A" to "]"
+	lb bc, BANK(Font), 32 ; 'A' to ']'
 	call Get1bppViaHDMA
 	ld de, Font + 32 * TILE_1BPP_SIZE
 	ld hl, vTiles1 tile $20
-	lb bc, BANK(Font), 32 ; "a" to $bf
+	lb bc, BANK(Font), 32 ; 'a' to $bf
 	call Get1bppViaHDMA
 	ld de, Font + 64 * TILE_1BPP_SIZE
 	ld hl, vTiles1 tile $40
-	lb bc, BANK(Font), 32 ; "Ä" to "←"
+	lb bc, BANK(Font), 32 ; 'Ä' to '←'
 	call Get1bppViaHDMA
 	ld de, Font + 96 * TILE_1BPP_SIZE
 	ld hl, vTiles1 tile $60
-	lb bc, BANK(Font), 32 ; "'" to "9"
+	lb bc, BANK(Font), 32 ; '\'' to '9'
 	call Get1bppViaHDMA
 	ret

 _LoadFontsExtra1::
 	ld de, FontsExtra_SolidBlackGFX
-	ld hl, vTiles2 tile "■" ; $60
+	ld hl, vTiles2 tile '■' ; $60
 	lb bc, BANK(FontsExtra_SolidBlackGFX), 1
 	call Get1bppViaHDMA
 	ld de, PokegearPhoneIconGFX
-	ld hl, vTiles2 tile "☎" ; $62
+	ld hl, vTiles2 tile '☎' ; $62
 	lb bc, BANK(PokegearPhoneIconGFX), 1
 	call Get2bppViaHDMA
-	ld de, FontExtra + 3 tiles ; "<BOLD_D>"
-	ld hl, vTiles2 tile "<BOLD_D>"
-	lb bc, BANK(FontExtra), 22 ; "<BOLD_D>" to "ぉ"
+	ld de, FontExtra + 3 tiles ; '<BOLD_D>'
+	ld hl, vTiles2 tile '<BOLD_D>'
+	lb bc, BANK(FontExtra), 22 ; '<BOLD_D>' to 'ぉ'
 	call Get2bppViaHDMA
 	jr LoadFrame

 _LoadFontsExtra2::
 	ld de, FontsExtra2_UpArrowGFX
-	ld hl, vTiles2 tile "▲" ; $61
+	ld hl, vTiles2 tile '▲' ; $61
 	ld b, BANK(FontsExtra2_UpArrowGFX)
 	ld c, 1
 	call Get2bppViaHDMA
@ -79,10 +79,10 @@ LoadFrame:
 	call AddNTimes
 	ld d, h
 	ld e, l
-	ld hl, vTiles2 tile "┌" ; $79
-	lb bc, BANK(Frames), TEXTBOX_FRAME_TILES ; "┌" to "┘"
+	ld hl, vTiles2 tile '┌' ; $79
+	lb bc, BANK(Frames), TEXTBOX_FRAME_TILES ; '┌' to '┘'
 	call Get1bppViaHDMA
-	ld hl, vTiles2 tile " " ; $7f
+	ld hl, vTiles2 tile ' ' ; $7f
 	ld de, TextboxSpaceGFX
 	lb bc, BANK(TextboxSpaceGFX), 1
 	call Get1bppViaHDMA
@ -94,8 +94,8 @@ LoadBattleFontsHPBar:
 	lb bc, BANK(FontBattleExtra), 12
 	call Get2bppViaHDMA
 	ld hl, vTiles2 tile $70
-	ld de, FontBattleExtra + 16 tiles ; "<DO>"
-	lb bc, BANK(FontBattleExtra), 3 ; "<DO>" to "『"
+	ld de, FontBattleExtra + 16 tiles ; '<DO>'
+	lb bc, BANK(FontBattleExtra), 3 ; '<DO>' to '『'
 	call Get2bppViaHDMA
 	call LoadFrame

--- a/engine/gfx/load_overworld_font.asm
+++ b/engine/gfx/load_overworld_font.asm
@ -4,7 +4,7 @@ LoadOverworldFont::
 	lb bc, BANK(.OverworldFontGFX), $80
 	call Get2bpp
 	ld de, .OverworldFontSpaceGFX
-	ld hl, vTiles2 tile " "
+	ld hl, vTiles2 tile ' '
 	lb bc, BANK(.OverworldFontSpaceGFX), 1
 	call Get2bpp
 	ret
--- a/engine/items/buy_sell_toss.asm
+++ b/engine/items/buy_sell_toss.asm
@ -128,7 +128,7 @@ BuySellToss_UpdateQuantityDisplay:
 	call MenuBoxCoord2Tile
 	ld de, SCREEN_WIDTH + 1
 	add hl, de
-	ld [hl], "×"
+	ld [hl], '×'
 	inc hl
 	ld de, wItemQuantityChange
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
--- a/engine/items/item_effects.asm
+++ b/engine/items/item_effects.asm
@ -795,7 +795,7 @@ HeavyBallMultiplier:
 	call HeavyBall_GetDexEntryBank
 	call GetFarByte
 	inc hl
-	cp "@"
+	cp '@'
 	jr nz, .SkipText

 	call HeavyBall_GetDexEntryBank
@ -1759,7 +1759,7 @@ ItemActionTextWaitButton:
 	ldh [hBGMapMode], a
 	hlcoord 0, 0
 	ld bc, wTilemapEnd - wTilemap
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	ld a, [wPartyMenuActionText]
 	call ItemActionText
--- a/engine/items/mart.asm
+++ b/engine/items/mart.asm
@ -283,12 +283,12 @@ GetMartPrice:
 .CharToNybble:
 	ld a, [de]
 	inc de
-	cp " "
+	cp ' '
 	jr nz, .not_space
-	ld a, "0"
+	ld a, '0'

 .not_space
-	sub "0"
+	sub '0'
 	ret

 ReadMart:
--- a/engine/items/pack.asm
+++ b/engine/items/pack.asm
@ -1426,7 +1426,7 @@ Pack_GetItemName:
 Pack_ClearTilemap: ; unreferenced
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	ret

--- a/engine/items/tmhm.asm
+++ b/engine/items/tmhm.asm
@ -336,7 +336,7 @@ TMHM_DisplayPocketItems:

 	hlcoord 5, 2
 	lb bc, 10, 15
-	ld a, " "
+	ld a, ' '
 	call ClearBox
 	call TMHM_GetCurrentPocketPosition
 	ld d, $5
@ -368,7 +368,7 @@ TMHM_DisplayPocketItems:
 	push af
 	sub NUM_TMS
 	ld [wTempTMHM], a
-	ld [hl], "H"
+	ld [hl], 'H'
 	inc hl
 	ld de, wTempTMHM
 	lb bc, PRINTNUM_LEFTALIGN | 1, 2
@ -393,9 +393,9 @@ TMHM_DisplayPocketItems:
 	jr nc, .hm2
 	ld bc, SCREEN_WIDTH + 9
 	add hl, bc
-	ld [hl], "×"
+	ld [hl], '×'
 	inc hl
-	ld a, "0" ; why are we doing this?
+	ld a, '0' ; why are we doing this?
 	pop bc
 	push bc
 	ld a, b
--- a/engine/link/link.asm
+++ b/engine/link/link.asm
@ -1315,7 +1315,7 @@ LinkTradeOTPartymonMenuLoop:
 	push bc
 	ld bc, NAME_LENGTH
 	add hl, bc
-	ld [hl], " "
+	ld [hl], ' '
 	pop bc
 	pop hl
 	ld a, [wPartyCount]
@ -1376,7 +1376,7 @@ LinkTradePartymonMenuLoop:
 	push bc
 	ld bc, NAME_LENGTH
 	add hl, bc
-	ld [hl], " "
+	ld [hl], ' '
 	pop bc
 	pop hl
 	ld a, 1
@ -1396,7 +1396,7 @@ LinkTradePartymonMenuLoop:
 	push bc
 	ld bc, NAME_LENGTH
 	add hl, bc
-	ld [hl], " "
+	ld [hl], ' '
 	pop bc
 	pop hl
 	jp LinkTradePartymonMenuCheckCancel
@ -1421,7 +1421,7 @@ LinkTrade_TradeStatsMenu:
 	farcall Link_WaitBGMap

 .joy_loop
-	ld a, " "
+	ld a, ' '
 	ldcoord_a 11, 16
 	ld a, PAD_A | PAD_B | PAD_RIGHT
 	ld [wMenuJoypadFilter], a
@ -1453,7 +1453,7 @@ LinkTrade_TradeStatsMenu:
 	jp LinkTrade_PlayerPartyMenu

 .d_right
-	ld a, " "
+	ld a, ' '
 	ldcoord_a 1, 16
 	ld a, PAD_A | PAD_B | PAD_LEFT
 	ld [wMenuJoypadFilter], a
@ -1490,11 +1490,11 @@ LinkTrade_TradeStatsMenu:
 	call SafeLoadTempTilemapToTilemap
 	hlcoord 6, 1
 	lb bc, 6, 1
-	ld a, " "
+	ld a, ' '
 	call LinkEngine_FillBox
 	hlcoord 17, 1
 	lb bc, 6, 1
-	ld a, " "
+	ld a, ' '
 	call LinkEngine_FillBox
 	jp LinkTrade_PlayerPartyMenu

@ -1587,14 +1587,14 @@ LinkTradeOTPartymonMenuCheckCancel:
 	push bc
 	ld bc, NAME_LENGTH
 	add hl, bc
-	ld [hl], " "
+	ld [hl], ' '
 	pop bc
 	pop hl
 	; fallthrough

 LinkTradePartymonMenuCheckCancel:
 .loop1
-	ld a, "▶"
+	ld a, '▶'
 	ldcoord_a 9, 17
 .loop2
 	call JoyTextDelay
@ -1604,7 +1604,7 @@ LinkTradePartymonMenuCheckCancel:
 	bit B_PAD_A, a
 	jr nz, .a_button
 	push af
-	ld a, " "
+	ld a, ' '
 	ldcoord_a 9, 17
 	pop af
 	bit B_PAD_UP, a
@ -1619,7 +1619,7 @@ LinkTradePartymonMenuCheckCancel:
 	jp LinkTrade_PlayerPartyMenu

 .a_button
-	ld a, "▷"
+	ld a, '▷'
 	ldcoord_a 9, 17
 	ld a, $f
 	ld [wPlayerLinkAction], a
@ -1655,7 +1655,7 @@ GSPlaceTradeScreenFooter: ; unreferenced
 	call ByteFill
 ; Clear out area for cancel string
 	hlcoord 1, 16
-	ld a, " "
+	ld a, ' '
 	ld bc, SCREEN_WIDTH - 2
 	call ByteFill
 ; Place the string
@ -1672,7 +1672,7 @@ LinkTradePlaceArrow:
 	hlcoord 6, 9
 	ld bc, SCREEN_WIDTH
 	call AddNTimes
-	ld [hl], "▷"
+	ld [hl], '▷'
 	ret

 LinkEngine_FillBox:
--- a/engine/link/link_2.asm
+++ b/engine/link/link_2.asm
@ -68,7 +68,7 @@ LinkTextbox2:
 	push hl
 	ld a, $79
 	ld [hli], a
-	ld a, " "
+	ld a, ' '
 	call .PlaceRow
 	ld [hl], $7a
 	pop hl
--- a/engine/link/link_trade.asm
+++ b/engine/link/link_trade.asm
@ -88,7 +88,7 @@ _LinkTextbox:
 	push hl
 	ld a, $33
 	ld [hli], a
-	ld a, " "
+	ld a, ' '
 	call .PlaceRow
 	ld [hl], $34
 	pop hl
--- a/engine/math/print_num.asm
+++ b/engine/math/print_num.asm
@ -19,7 +19,7 @@ _PrintNum::
 	jr z, .main

 .moneyflag ; 101xxxxx or 011xxxxx
-	ld a, "¥"
+	ld a, '¥'
 	ld [hli], a
 	res PRINTNUM_MONEY_F, b ; 100xxxxx or 010xxxxx

@ -133,7 +133,7 @@ _PrintNum::
 .two
 	dec e
 	jr nz, .two_skip
-	ld a, "0"
+	ld a, '0'
 	ldh [hPrintNumBuffer + 0], a
 .two_skip

@ -157,7 +157,7 @@ _PrintNum::
 .money
 	call .PrintYen
 	push af
-	ld a, "0"
+	ld a, '0'
 	add c
 	ld [hl], a
 	pop af
@ -166,12 +166,12 @@ _PrintNum::
 	dec e
 	jr nz, .money_leading_zero
 	inc hl
-	ld [hl], "<DOT>"
+	ld [hl], '<DOT>'

 .money_leading_zero
 	call .AdvancePointer
 	call .PrintYen
-	ld a, "0"
+	ld a, '0'
 	add b
 	ld [hli], a

@ -186,7 +186,7 @@ _PrintNum::
 	jr nz, .stop
 	bit PRINTNUM_MONEY_F, d
 	jr z, .stop
-	ld a, "¥"
+	ld a, '¥'
 	ld [hli], a
 	res PRINTNUM_MONEY_F, d

@ -197,7 +197,7 @@ _PrintNum::
 .PrintDigit:
 	dec e
 	jr nz, .ok
-	ld a, "0"
+	ld a, '0'
 	ldh [hPrintNumBuffer + 0], a
 .ok
 	ld c, 0
@ -264,11 +264,11 @@ _PrintNum::
 	jr nz, .done
 	bit PRINTNUM_MONEY_F, d
 	jr z, .done
-	ld a, "¥"
+	ld a, '¥'
 	ld [hli], a
 	res PRINTNUM_MONEY_F, d
 .done
-	ld a, "0"
+	ld a, '0'
 	add c
 	ld [hl], a
 	ldh [hPrintNumBuffer + 0], a
@ -276,14 +276,14 @@ _PrintNum::
 	dec e
 	ret nz
 	inc hl
-	ld [hl], "<DOT>"
+	ld [hl], '<DOT>'
 	ret

 .PrintLeadingZero:
 ; prints a leading zero unless they are turned off in the flags
 	bit PRINTNUM_LEADINGZEROS_F, d
 	ret z
-	ld [hl], "0"
+	ld [hl], '0'
 	ret

 .AdvancePointer:
--- a/engine/menus/intro_menu.asm
+++ b/engine/menus/intro_menu.asm
@ -245,13 +245,13 @@ SetDefaultBoxNames:
 	cp 10
 	jr c, .less
 	sub 10
-	ld [hl], "1"
+	ld [hl], '1'
 	inc hl

 .less
-	add "0"
+	add '0'
 	ld [hli], a
-	ld [hl], "@"
+	ld [hl], '@'
 	pop hl
 	ld de, 9
 	add hl, de
@ -622,7 +622,7 @@ Continue_DisplayGameTime:
 	ld de, wGameTimeHours
 	lb bc, 2, 3
 	call PrintNum
-	ld [hl], "<COLON>"
+	ld [hl], '<COLON>'
 	inc hl
 	ld de, wGameTimeMinutes
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
@ -794,7 +794,7 @@ GSShowPlayerNamingChoices: ; unreferenced
 	ret

 StorePlayerName:
-	ld a, "@"
+	ld a, '@'
 	ld bc, NAME_LENGTH
 	ld hl, wPlayerName
 	call ByteFill
--- a/engine/menus/main_menu.asm
+++ b/engine/menus/main_menu.asm
@ -309,7 +309,7 @@ MainMenu_PrintCurrentTimeAndDay:
 	ldh a, [hHours]
 	ld c, a
 	farcall PrintHour
-	ld [hl], ":"
+	ld [hl], ':'
 	inc hl
 	ld de, hMinutes
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
--- a/engine/menus/menu.asm
+++ b/engine/menus/menu.asm
@ -498,7 +498,7 @@ Move2DMenuCursor:
 	ld h, [hl]
 	ld l, a
 	ld a, [hl]
-	cp "▶"
+	cp '▶'
 	jr nz, Place2DMenuCursor
 	ld a, [wCursorOffCharacter]
 	ld [hl], a
@ -542,10 +542,10 @@ Place2DMenuCursor:
 	ld c, a
 	add hl, bc
 	ld a, [hl]
-	cp "▶"
+	cp '▶'
 	jr z, .cursor_on
 	ld [wCursorOffCharacter], a
-	ld [hl], "▶"
+	ld [hl], '▶'

 .cursor_on
 	ld a, l
--- a/engine/menus/menu_2.asm
+++ b/engine/menus/menu_2.asm
@ -18,7 +18,7 @@ PlaceMenuItemQuantity:
 	jr nz, .done
 	ld de, $15
 	add hl, de
-	ld [hl], "×"
+	ld [hl], '×'
 	inc hl
 	ld de, wMenuSelectionQuantity
 	lb bc, 1, 2
--- a/engine/menus/naming_screen.asm
+++ b/engine/menus/naming_screen.asm
@ -1,8 +1,8 @@
 DEF NAMINGSCREEN_CURSOR     EQU $7e

-DEF NAMINGSCREEN_BORDER     EQU "■" ; $60
-DEF NAMINGSCREEN_MIDDLELINE EQU "→" ; $eb
-DEF NAMINGSCREEN_UNDERLINE  EQU "<DOT>" ; $f2
+DEF NAMINGSCREEN_BORDER     EQU '■' ; $60
+DEF NAMINGSCREEN_MIDDLELINE EQU '→' ; $eb
+DEF NAMINGSCREEN_UNDERLINE  EQU '<DOT>' ; $f2

 _NamingScreen:
 	call DisableSpriteUpdates
@ -106,9 +106,9 @@ NamingScreenJumptable:
 	call PlaceString
 	farcall GetGender
 	jr c, .genderless
-	ld a, "♂"
+	ld a, '♂'
 	jr nz, .place_gender
-	ld a, "♀"
+	ld a, '♀'
 .place_gender
 	hlcoord 1, 2
 	ld [hl], a
@ -683,7 +683,7 @@ NamingScreen_AdvanceCursor_CheckEndOfString:
 	inc [hl]
 	call NamingScreen_GetTextCursorPosition
 	ld a, [hl]
-	cp "@"
+	cp '@'
 	jr z, .end_of_string
 	ld [hl], NAMINGSCREEN_UNDERLINE
 	and a
@ -763,7 +763,7 @@ NamingScreen_InitNameEntry:
 	ld [hli], a
 	dec c
 	jr nz, .loop
-	ld [hl], "@"
+	ld [hl], '@'
 	ret

 NamingScreen_StoreEntry:
@ -780,7 +780,7 @@ NamingScreen_StoreEntry:
 	cp NAMINGSCREEN_UNDERLINE
 	jr nz, .not_terminator
 .terminator
-	ld [hl], "@"
+	ld [hl], '@'
 .not_terminator
 	inc hl
 	dec c
@ -959,7 +959,7 @@ _ComposeMailMessage:
 	ld d, [hl]
 	ld hl, MAIL_LINE_LENGTH
 	add hl, de
-	ld [hl], "<NEXT>"
+	ld [hl], '<NEXT>'
 	ret

 .MailIcon:
@ -981,7 +981,7 @@ INCBIN "gfx/naming_screen/mail.2bpp"
 	call ByteFill
 	hlcoord 0, 6
 	ld bc, 12 * SCREEN_WIDTH
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 1, 1
 	lb bc, 4, SCREEN_WIDTH - 2
@ -1104,7 +1104,7 @@ INCBIN "gfx/naming_screen/mail.2bpp"
 	call NamingScreen_GetTextCursorPosition
 	ld [hl], NAMINGSCREEN_UNDERLINE
 	dec hl
-	ld [hl], "<NEXT>"
+	ld [hl], '<NEXT>'
 	ret

 .start
@ -1130,7 +1130,7 @@ INCBIN "gfx/naming_screen/mail.2bpp"
 	call NamingScreen_GetTextCursorPosition
 	ld [hl], NAMINGSCREEN_UNDERLINE
 	inc hl
-	ld [hl], "<NEXT>"
+	ld [hl], '<NEXT>'
 	ret

 .finished
--- a/engine/menus/options_menu.asm
+++ b/engine/menus/options_menu.asm
@ -478,7 +478,7 @@ Options_Frame:
 UpdateFrame:
 	ld a, [wTextboxFrame]
 	hlcoord 16, 15 ; where on the screen the number is drawn
-	add "1"
+	add '1'
 	ld [hl], a
 	call LoadFontsExtra
 	and a
@ -548,7 +548,7 @@ Options_UpdateCursorPosition:
 	ld de, SCREEN_WIDTH
 	ld c, SCREEN_HEIGHT - 2
 .loop
-	ld [hl], " "
+	ld [hl], ' '
 	add hl, de
 	dec c
 	jr nz, .loop
@ -556,5 +556,5 @@ Options_UpdateCursorPosition:
 	ld bc, 2 * SCREEN_WIDTH
 	ld a, [wJumptableIndex]
 	call AddNTimes
-	ld [hl], "▶"
+	ld [hl], '▶'
 	ret
--- a/engine/menus/scrolling_menu.asm
+++ b/engine/menus/scrolling_menu.asm
@ -201,7 +201,7 @@ ScrollingMenu_ClearLeftColumn:
 	ld de, 2 * SCREEN_WIDTH
 	ld a, [wMenuData_ScrollingMenuHeight]
 .loop
-	ld [hl], " "
+	ld [hl], ' '
 	add hl, de
 	dec a
 	jr nz, .loop
@ -355,7 +355,7 @@ ScrollingMenu_UpdateDisplay:
 	ld a, [wMenuBorderRightCoord]
 	ld c, a
 	call Coord2Tile
-	ld [hl], "▲"
+	ld [hl], '▲'

 .okay
 	call MenuBoxCoord2Tile
@ -392,7 +392,7 @@ ScrollingMenu_UpdateDisplay:
 	ld a, [wMenuBorderRightCoord]
 	ld c, a
 	call Coord2Tile
-	ld [hl], "▼"
+	ld [hl], '▼'

 .done
 	ret
@ -461,7 +461,7 @@ ScrollingMenu_PlaceCursor:
 	add $0
 	ld c, a
 	call Coord2Tile
-	ld [hl], "▷"
+	ld [hl], '▷'

 .done
 	ret
--- a/engine/menus/trainer_card.asm
+++ b/engine/menus/trainer_card.asm
@ -359,7 +359,7 @@ TrainerCard_InitBorder:
 	ld [hli], a

 	ld e, SCREEN_WIDTH - 3
-	ld a, " "
+	ld a, ' '
 .loop2
 	ld [hli], a
 	dec e
@ -375,7 +375,7 @@ TrainerCard_InitBorder:
 	ld [hli], a

 	ld e, SCREEN_WIDTH - 2
-	ld a, " "
+	ld a, ' '
 .loop4
 	ld [hli], a
 	dec e
@ -393,7 +393,7 @@ TrainerCard_InitBorder:
 	ld [hli], a

 	ld e, SCREEN_WIDTH - 3
-	ld a, " "
+	ld a, ' '
 .loop5
 	ld [hli], a
 	dec e
@ -455,7 +455,7 @@ TrainerCard_Page1_PrintGameTime:
 	ret nz
 	hlcoord 15, 12
 	ld a, [hl]
-	xor " " ^ $2e ; alternate between space and small colon ($2e) tiles
+	xor ' ' ^ $2e ; alternate between space and small colon ($2e) tiles
 	ld [hl], a
 	ret

--- a/engine/movie/credits.asm
+++ b/engine/movie/credits.asm
@ -248,7 +248,7 @@ ParseCredits:
 	ldh [hBGMapMode], a
 	hlcoord 0, 5
 	ld bc, SCREEN_WIDTH * 12
-	ld a, " "
+	ld a, ' '
 	call ByteFill

 ; Then read the script.
--- a/engine/movie/init_hof_credits.asm
+++ b/engine/movie/init_hof_credits.asm
@ -7,7 +7,7 @@ InitDisplayForHallOfFame:
 	call LoadFontsBattleExtra
 	hlbgcoord 0, 0
 	ld bc, vBGMap1 - vBGMap0
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 0, 0, wAttrmap
 	ld bc, SCREEN_AREA
@ -36,7 +36,7 @@ InitDisplayForRedCredits:
 	call LoadFontsBattleExtra
 	hlbgcoord 0, 0
 	ld bc, vBGMap1 - vBGMap0
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 0, 0, wAttrmap
 	ld bc, SCREEN_AREA
@ -66,7 +66,7 @@ ResetDisplayBetweenHallOfFameMons:
 	ldh [rWBK], a
 	ld hl, wDecompressScratch
 	ld bc, wScratchAttrmap - wDecompressScratch
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlbgcoord 0, 0
 	ld de, wDecompressScratch
--- a/engine/movie/title.asm
+++ b/engine/movie/title.asm
@ -101,7 +101,7 @@ _TitleScreen:
 ; Clear screen tiles
 	hlbgcoord 0, 0
 	ld bc, 64 * TILEMAP_WIDTH
-	ld a, " "
+	ld a, ' '
 	call ByteFill

 ; Draw Pokemon logo
--- a/engine/movie/trade_animation.asm
+++ b/engine/movie/trade_animation.asm
@ -1,5 +1,5 @@
-DEF TRADEANIM_RIGHT_ARROW EQU "▶" ; $ed
-DEF TRADEANIM_LEFT_ARROW  EQU "▼" ; $ee
+DEF TRADEANIM_RIGHT_ARROW EQU '▶' ; $ed
+DEF TRADEANIM_LEFT_ARROW  EQU '▼' ; $ee

 ; TradeAnim_TubeAnimJumptable.Jumptable indexes
 	const_def
@ -177,7 +177,7 @@ RunTradeAnimScript:
 .NotCGB:
 	hlbgcoord 0, 0
 	ld bc, STARTOF(VRAM) + SIZEOF(VRAM) - vBGMap0
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	ld hl, TradeGameBoyLZ
 	ld de, vTiles2 tile $31
@ -471,7 +471,7 @@ TradeAnim_TubeToPlayer8:
 	callfar ClearSpriteAnims
 	hlbgcoord 0, 0
 	ld bc, STARTOF(VRAM) + SIZEOF(VRAM) - vBGMap0
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	xor a
 	ldh [hSCX], a
@ -595,7 +595,7 @@ TradeAnim_PlaceTrademonStatsOnTubeAnim:
 	call ClearTilemap
 	hlcoord 0, 0
 	ld bc, SCREEN_WIDTH
-	ld a, "─"
+	ld a, '─'
 	call ByteFill
 	hlcoord 0, 1
 	ld de, wLinkPlayer1Name
@ -604,7 +604,7 @@ TradeAnim_PlaceTrademonStatsOnTubeAnim:
 	ld de, 0
 .find_name_end_loop
 	ld a, [hli]
-	cp "@"
+	cp '@'
 	jr z, .done
 	dec de
 	jr .find_name_end_loop
@ -973,7 +973,7 @@ TrademonStats_PrintSpeciesNumber:
 	hlcoord 10, 0
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 3
 	call PrintNum
-	ld [hl], " "
+	ld [hl], ' '
 	ret

 TrademonStats_PrintSpeciesName:
@ -1218,7 +1218,7 @@ TradeAnim_TakeCareOfText:
 	call WaitTop
 	hlcoord 0, 10
 	ld bc, 8 * SCREEN_WIDTH
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	call WaitBGMap
 	ld hl, .TakeGoodCareOfMonText
@ -1279,7 +1279,7 @@ TradeAnim_Wait80Frames:
 TradeAnim_BlankTilemap:
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	ret

--- a/engine/overworld/init_map.asm
+++ b/engine/overworld/init_map.asm
@ -83,7 +83,7 @@ HDMATransfer_FillBGMap0WithBlack:
 	ld a, BANK(wDecompressScratch)
 	ldh [rWBK], a

-	ld a, "■"
+	ld a, '■'
 	ld hl, wDecompressScratch
 	ld bc, wScratchAttrmap - wDecompressScratch
 	call ByteFill
--- a/engine/overworld/player_object.asm
+++ b/engine/overworld/player_object.asm
@ -6,7 +6,7 @@ BlankScreen:
 	call ClearSprites
 	hlcoord 0, 0
 	ld bc, wTilemapEnd - wTilemap
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 0, 0, wAttrmap
 	ld bc, wAttrmapEnd - wAttrmap
--- a/engine/overworld/scripting.asm
+++ b/engine/overworld/scripting.asm
@ -1676,7 +1676,7 @@ Script_getnum:
 ResetStringBuffer1:
 	ld hl, wStringBuffer1
 	ld bc, NAME_LENGTH
-	ld a, "@"
+	ld a, '@'
 	call ByteFill
 	ret

--- a/engine/overworld/warp_connection.asm
+++ b/engine/overworld/warp_connection.asm
@ -259,7 +259,7 @@ LoadMapTimeOfDay:
 	pop af
 	ldh [rVBK], a

-	ld a, "■"
+	ld a, '■'
 	ld bc, vBGMap1 - vBGMap0
 	hlbgcoord 0, 0
 	call ByteFill
--- a/engine/overworld/wildmons.asm
+++ b/engine/overworld/wildmons.asm
@ -908,7 +908,7 @@ RandomPhoneMon:
 	ld a, BANK(Trainers)
 	call GetFarByte
 	inc hl
-	cp "@"
+	cp '@'
 	jr nz, .skip_name

 	ld a, BANK(Trainers)
--- a/engine/phone/phone.asm
+++ b/engine/phone/phone.asm
@ -495,7 +495,7 @@ PhoneCall::
 .CallerTextboxWithName:
 	call Phone_CallerTextbox
 	hlcoord 1, 2
-	ld [hl], "☎"
+	ld [hl], '☎'
 	inc hl
 	inc hl
 ; BUG: The unused phonecall script command may crash (see docs/bugs_and_glitches.md)
@ -582,7 +582,7 @@ Phone_TextboxWithName:
 	push bc
 	call Phone_CallerTextbox
 	hlcoord 1, 1
-	ld [hl], "☎"
+	ld [hl], '☎'
 	inc hl
 	inc hl
 	ld d, h
@ -640,7 +640,7 @@ GetCallerName:
 	push hl
 	push bc
 	call PlaceString
-	ld a, ":"
+	ld a, ':'
 	ld [bc], a
 	pop bc
 	pop hl
--- a/engine/pokedex/pokedex.asm
+++ b/engine/pokedex/pokedex.asm
@ -884,7 +884,7 @@ Pokedex_UnownModeHandleDPadInput:
 	ret

 Pokedex_UnownModeEraseCursor:
-	ld c, " "
+	ld c, ' '
 	jr Pokedex_UnownModeUpdateCursorGfx

 Pokedex_UnownModePlaceCursor:
@ -1144,7 +1144,7 @@ Pokedex_DrawDexEntryScreenBG:
 	hlcoord 19, 0
 	ld [hl], $34
 	hlcoord 19, 1
-	ld a, " "
+	ld a, ' '
 	ld b, 15
 	call Pokedex_FillColumn
 	ld [hl], $39
@ -1154,7 +1154,7 @@ Pokedex_DrawDexEntryScreenBG:
 	call ByteFill
 	hlcoord 1, 17
 	ld bc, 18
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 9, 7
 	ld de, .Height
@ -1299,7 +1299,7 @@ Pokedex_PlaceSearchResultsTypeStrings:
 	hlcoord 2, 15
 	call Pokedex_PlaceTypeString
 	hlcoord 1, 15
-	ld [hl], "/"
+	ld [hl], '/'
 .done
 	ret

@ -1478,7 +1478,7 @@ Pokedex_PrintListing:
 	add a
 	inc a
 	ld b, a
-	ld a, " "
+	ld a, ' '
 	call Pokedex_FillBox

 ; Load de with wPokedexOrder + [wDexListingScrollOffset]
@ -1846,7 +1846,7 @@ Pokedex_PlaceSearchScreenTypeStrings:
 	ldh [hBGMapMode], a
 	hlcoord 9, 3
 	lb bc, 4, 8
-	ld a, " "
+	ld a, ' '
 	call Pokedex_FillBox
 	ld a, [wDexSearchMonType1]
 	hlcoord 9, 4
@ -2226,7 +2226,7 @@ Pokedex_MoveArrowCursor:
 	and a
 	jr z, .no_action
 	call Pokedex_GetArrowCursorPos
-	ld [hl], " "
+	ld [hl], ' '
 	ld hl, wDexArrowCursorPosIndex
 	dec [hl]
 	jr .update_cursor_pos
@ -2236,13 +2236,13 @@ Pokedex_MoveArrowCursor:
 	cp c
 	jr nc, .no_action
 	call Pokedex_GetArrowCursorPos
-	ld [hl], " "
+	ld [hl], ' '
 	ld hl, wDexArrowCursorPosIndex
 	inc [hl]

 .update_cursor_pos
 	call Pokedex_GetArrowCursorPos
-	ld [hl], "▶"
+	ld [hl], '▶'
 	ld a, 12
 	ld [wDexArrowCursorDelayCounter], a
 	xor a
@ -2256,7 +2256,7 @@ Pokedex_MoveArrowCursor:

 .select
 	call Pokedex_GetArrowCursorPos
-	ld [hl], " "
+	ld [hl], ' '
 	ld a, [wDexArrowCursorPosIndex]
 	cp c
 	jr c, .update
@ -2284,12 +2284,12 @@ Pokedex_BlinkArrowCursor:
 	and $8
 	jr z, .blink_on
 	call Pokedex_GetArrowCursorPos
-	ld [hl], " "
+	ld [hl], ' '
 	ret

 .blink_on
 	call Pokedex_GetArrowCursorPos
-	ld [hl], "▶"
+	ld [hl], '▶'
 	ret

 Pokedex_ArrowCursorDelay:
@ -2535,7 +2535,7 @@ _NewPokedexEntry:
 	ld [hl], $3b
 	inc hl
 	ld bc, 19
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	farcall DisplayDexEntry
 	call EnableLCD
--- a/engine/pokedex/pokedex_2.asm
+++ b/engine/pokedex/pokedex_2.asm
@ -259,7 +259,7 @@ GetDexEntryPagePointer:
 	ld a, b
 	call GetFarByte
 	inc hl
-	cp "@"
+	cp '@'
 	jr nz, .loop1
 ; skip height and weight
 rept 4
@ -273,7 +273,7 @@ endr
 	ld a, b
 	call GetFarByte
 	inc hl
-	cp "@"
+	cp '@'
 	jr nz, .loop2

 .done
--- a/engine/pokedex/unown_dex.asm
+++ b/engine/pokedex/unown_dex.asm
@ -21,7 +21,7 @@ UpdateUnownDex:
 PrintUnownWord:
 	hlcoord 4, 15
 	ld bc, 12
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	ld a, [wDexCurUnownIndex]
 	ld e, a
--- a/engine/pokegear/pokegear.asm
+++ b/engine/pokegear/pokegear.asm
@ -873,7 +873,7 @@ PokegearPhone_Joypad:
 	ld a, [wPokegearPhoneCursorPosition]
 	ld bc, SCREEN_WIDTH * 2
 	call AddNTimes
-	ld [hl], "▷"
+	ld [hl], '▷'
 	call PokegearPhoneContactSubmenu
 	jr c, .quit_submenu
 	ld hl, wJumptableIndex
@ -1003,7 +1003,7 @@ PokegearPhone_GetDPad:
 	ret

 PokegearPhone_UpdateCursor:
-	ld a, " "
+	ld a, ' '
 for y, PHONE_DISPLAY_HEIGHT
 	hlcoord 1, 4 + y * 2
 	ld [hl], a
@ -1012,13 +1012,13 @@ endr
 	ld a, [wPokegearPhoneCursorPosition]
 	ld bc, 2 * SCREEN_WIDTH
 	call AddNTimes
-	ld [hl], "▶"
+	ld [hl], '▶'
 	ret

 PokegearPhone_UpdateDisplayList:
 	hlcoord 1, 3
 	ld b, PHONE_DISPLAY_HEIGHT * 2 + 1
-	ld a, " "
+	ld a, ' '
 .row
 	ld c, SCREEN_WIDTH - 2
 .col
@ -1230,7 +1230,7 @@ PokegearPhoneContactSubmenu:
 	ld a, [de]
 	ld c, a
 	push hl
-	ld a, " "
+	ld a, ' '
 	ld de, SCREEN_WIDTH * 2
 .clear_column
 	ld [hl], a
@ -1241,7 +1241,7 @@ PokegearPhoneContactSubmenu:
 	ld a, [wPokegearPhoneSubmenuCursor]
 	ld bc, SCREEN_WIDTH  * 2
 	call AddNTimes
-	ld [hl], "▶"
+	ld [hl], '▶'
 	pop de
 	ret

@ -1972,13 +1972,13 @@ PlayRadio:
 	lb bc, 4, 18
 	call Textbox
 	hlcoord 1, 14
-	ld [hl], "“"
+	ld [hl], '“'
 	pop de
 	hlcoord 2, 14
 	call PlaceString
 	ld h, b
 	ld l, c
-	ld [hl], "”"
+	ld [hl], '”'
 	call WaitBGMap
 	ret

@ -2141,7 +2141,7 @@ TownMapBubble:
 	ld [hli], a
 ; Top row
 	ld bc, 16
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 ; Top-right corner
 	ld a, $31
@ -2150,7 +2150,7 @@ TownMapBubble:

 ; Middle row
 	ld bc, SCREEN_WIDTH - 2
-	ld a, " "
+	ld a, ' '
 	call ByteFill

 ; Bottom-left corner
@ -2159,7 +2159,7 @@ TownMapBubble:
 	ld [hli], a
 ; Bottom row
 	ld bc, 16
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 ; Bottom-right corner
 	ld a, $33
@ -2450,7 +2450,7 @@ Pokedex_GetArea:
 .PlaceString_MonsNest:
 	hlcoord 0, 0
 	ld bc, SCREEN_WIDTH
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 0, 1
 	ld a, $06
--- a/engine/pokegear/radio.asm
+++ b/engine/pokegear/radio.asm
@ -149,9 +149,9 @@ ReplacePeriodsWithSpaces: ; unreferenced
 	ld b, SCREEN_WIDTH * 2
 .loop
 	ld a, [hl]
-	cp "."
+	cp '.'
 	jr nz, .next
-	ld [hl], " "
+	ld [hl], ' '
 .next
 	inc hl
 	dec b
@ -633,11 +633,11 @@ CopyBottomLineToTopLine:
 ClearBottomLine:
 	hlcoord 1, 15
 	ld bc, SCREEN_WIDTH - 2
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 1, 16
 	ld bc, SCREEN_WIDTH - 2
-	ld a, " "
+	ld a, ' '
 	jp ByteFill

 PokedexShow_GetDexEntryBank:
@ -699,7 +699,7 @@ PokedexShow2:
 	push hl
 	call CopyDexEntryPart1
 	dec hl
-	ld [hl], "<DONE>"
+	ld [hl], '<DONE>'
 	ld hl, wPokedexShowPointerAddr
 	call CopyRadioTextToRAM
 	pop hl
@ -755,7 +755,7 @@ CopyDexEntry:
 	push hl
 	call CopyDexEntryPart1
 	dec hl
-	ld [hl], "<DONE>"
+	ld [hl], '<DONE>'
 	ld hl, wPokedexShowPointerAddr
 	call CopyRadioTextToRAM
 	pop hl
@ -770,15 +770,15 @@ CopyDexEntryPart1:
 	ld hl, wPokedexShowPointerAddr
 	ld [hl], TX_START
 	inc hl
-	ld [hl], "<LINE>"
+	ld [hl], '<LINE>'
 	inc hl
 .loop
 	ld a, [hli]
-	cp "@"
+	cp '@'
 	ret z
-	cp "<NEXT>"
+	cp '<NEXT>'
 	ret z
-	cp "<DEXEND>"
+	cp '<DEXEND>'
 	ret z
 	jr .loop

@ -788,11 +788,11 @@ CopyDexEntryPart2:
 	ld a, d
 	call GetFarByte
 	inc hl
-	cp "@"
+	cp '@'
 	jr z, .okay
-	cp "<NEXT>"
+	cp '<NEXT>'
 	jr z, .okay
-	cp "<DEXEND>"
+	cp '<DEXEND>'
 	jr nz, .loop
 .okay
 	ld a, l
@ -959,7 +959,7 @@ LuckyNumberShow8:
 	ld de, wLuckyIDNumber
 	lb bc, PRINTNUM_LEADINGZEROS | 2, 5
 	call PrintNum
-	ld a, "@"
+	ld a, '@'
 	ld [wStringBuffer1 + 5], a
 	ld hl, LC_Text8
 	ld a, LUCKY_NUMBER_SHOW_9
@ -1571,7 +1571,7 @@ GetBuenasPassword:
 .read_loop
 	ld a, [de]
 	inc de
-	cp "@"
+	cp '@'
 	jr nz, .read_loop
 	dec c
 	jr nz, .read_loop
@ -1582,7 +1582,7 @@ GetBuenasPassword:
 	ld a, [de]
 	inc de
 	ld [hli], a
-	cp "@"
+	cp '@'
 	jr nz, .copy_loop
 	ld de, wStringBuffer1
 	ret
--- a/engine/pokegear/townmap_convertlinebreakcharacters.asm
+++ b/engine/pokegear/townmap_convertlinebreakcharacters.asm
@ -2,17 +2,17 @@ TownMap_ConvertLineBreakCharacters:
 	ld hl, wStringBuffer1
 .loop
 	ld a, [hl]
-	cp "@"
+	cp '@'
 	jr z, .end
-	cp "<WBR>"
+	cp '<WBR>'
 	jr z, .line_feed
-	cp "<BSP>"
+	cp '<BSP>'
 	jr z, .line_feed
 	inc hl
 	jr .loop

 .line_feed
-	ld [hl], "<LF>"
+	ld [hl], '<LF>'

 .end
 	ld de, wStringBuffer1
--- a/engine/pokemon/bills_pc.asm
+++ b/engine/pokemon/bills_pc.asm
@ -1083,9 +1083,9 @@ PCMonInfo:
 	ld [wMonType], a
 	farcall GetGender
 	jr c, .skip_gender
-	ld a, "♂"
+	ld a, '♂'
 	jr nz, .printgender
-	ld a, "♀"
+	ld a, '♀'
 .printgender
 	hlcoord 5, 12
 	ld [hl], a
@ -1222,9 +1222,9 @@ BillsPC_RefreshTextboxes:
 	call Textbox

 	hlcoord 8, 2
-	ld [hl], "└"
+	ld [hl], '└'
 	hlcoord 19, 2
-	ld [hl], "┘"
+	ld [hl], '┘'

 	ld a, [wBillsPC_ScrollPosition]
 	ld e, a
@ -1799,7 +1799,7 @@ DepositPokemon:
 	ld h, b
 	ld de, wStringBuffer1
 	call PlaceString
-	ld a, "!"
+	ld a, '!'
 	ld [bc], a
 	ld c, 50
 	call DelayFrames
@ -1854,7 +1854,7 @@ TryWithdrawPokemon:
 	ld h, b
 	ld de, wStringBuffer1
 	call PlaceString
-	ld a, "!"
+	ld a, '!'
 	ld [bc], a
 	ld c, 50
 	call DelayFrames
@ -1913,7 +1913,7 @@ ReleasePKMN_ByePKMN:
 	call PlaceString
 	ld l, c
 	ld h, b
-	ld [hl], "!"
+	ld [hl], '!'
 	ld c, 50
 	call DelayFrames
 	ret
@ -2252,7 +2252,7 @@ BillsPC_ClearTilemap:
 	ldh [hBGMapMode], a
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	ret

--- a/engine/pokemon/bills_pc_top.asm
+++ b/engine/pokemon/bills_pc_top.asm
@ -236,7 +236,7 @@ ClearPCItemScreen:
 	call ClearSprites
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 0, 0
 	lb bc, 10, 18
--- a/engine/pokemon/breeding.asm
+++ b/engine/pokemon/breeding.asm
@ -647,7 +647,7 @@ Hatch_UpdateFrontpicBGMapCenter:
 	push bc
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	pop bc
 	pop hl
--- a/engine/pokemon/correct_nick_errors.asm
+++ b/engine/pokemon/correct_nick_errors.asm
@ -11,7 +11,7 @@ CorrectNickErrors::
 .checkchar
 ; end of nick?
 	ld a, [de]
-	cp "@" ; terminator
+	cp '@' ; terminator
 	jr z, .end

 ; check if this char is a text command
@ -34,8 +34,8 @@ CorrectNickErrors::
 	cp [hl]
 	jr nc, .loop

-; replace it with a "?"
-	ld a, "?"
+; replace it with a '?'
+	ld a, '?'
 	ld [de], a
 	jr .loop

@ -49,10 +49,10 @@ CorrectNickErrors::
 ; change nick to "?@"
 	pop de
 	push de
-	ld a, "?"
+	ld a, '?'
 	ld [de], a
 	inc de
-	ld a, "@"
+	ld a, '@'
 	ld [de], a
 .end
 ; if the nick has any errors at this point it's out of our hands
@ -64,11 +64,11 @@ CorrectNickErrors::
 ; table defining which characters are actually text commands
 ; format:
 	;      ≥           <
-	db "<NULL>",   "ガ"
-	db "<PLAY_G>", "<JP_18>" + 1
-	db "<NI>",     "<NO>"    + 1
-	db "<ROUTE>",  "<GREEN>" + 1
-	db "<ENEMY>",  "<ENEMY>" + 1
-	db "<MOM>",    "<TM>"    + 1
-	db "<ROCKET>", "┘"       + 1
+	db '<NULL>',   'ガ'
+	db '<PLAY_G>', '<JP_18>' + 1
+	db '<NI>',     '<NO>'    + 1
+	db '<ROUTE>',  '<GREEN>' + 1
+	db '<ENEMY>',  '<ENEMY>' + 1
+	db '<MOM>',    '<TM>'    + 1
+	db '<ROCKET>', '┘'       + 1
 	db -1 ; end
--- a/engine/pokemon/correct_party_errors.asm
+++ b/engine/pokemon/correct_party_errors.asm
@ -211,7 +211,7 @@ CorrectPartyErrors: ; unreferenced
 	ld b, NAME_LENGTH_JAPANESE
 .search_loop
 	ld a, [de]
-	cp "@"
+	cp '@'
 	jr z, .done
 	inc de
 	inc c
@ -219,7 +219,7 @@ CorrectPartyErrors: ; unreferenced
 	jr nz, .search_loop
 	dec c
 	dec de
-	ld a, "@"
+	ld a, '@'
 	ld [de], a
 .done
 	pop de
--- a/engine/pokemon/european_mail.asm
+++ b/engine/pokemon/european_mail.asm
@ -3,24 +3,24 @@ ParseMailLanguage:
 	ld hl, sPartyMon1MailNationality - sPartyMon1Mail
 	add hl, de
 	ld a, [hli]
-	cp "E"
+	cp 'E'
 	ret nz
 	ld a, [hli]
 	assert MAIL_LANG_ENGLISH + 1 == MAIL_LANG_FRENCH
 	inc c
-	cp "F"
+	cp 'F'
 	ret z
 	assert MAIL_LANG_FRENCH + 1 == MAIL_LANG_GERMAN
 	inc c
-	cp "G"
+	cp 'G'
 	ret z
 	assert MAIL_LANG_GERMAN + 1 == MAIL_LANG_ITALIAN
 	inc c
-	cp "I"
+	cp 'I'
 	ret z
 	assert MAIL_LANG_ITALIAN + 1 == MAIL_LANG_SPANISH
 	inc c
-	cp "S"
+	cp 'S'
 	ret z
 	ld c, MAIL_LANG_ENGLISH
 	ret
@ -48,13 +48,13 @@ ConvertFrenchGermanMailToEnglish:
 	ld a, [hl]
 	cp $dc ; 's in French/German font
 	jr nz, .check_intermediate_chars
-	ld a, "'s"
+	ld a, '\'s'
 	jr .replace

 .check_intermediate_chars
-	sub "'s"
+	sub '\'s'
 	jr c, .dont_replace
-	cp "'v" - "'s" + 1
+	cp '\'v' - '\'s' + 1
 	jr nc, .dont_replace
 	add $cd

@ -76,7 +76,7 @@ ConvertEnglishMailToFrenchGerman:
 	ld l, e
 .loop
 	ld a, [hl]
-	cp "'s"
+	cp '\'s'
 	jr nz, .check_intermediate_chars
 	ld a, $dc ; 's in French/German font
 	jr .replace
@ -84,9 +84,9 @@ ConvertEnglishMailToFrenchGerman:
 .check_intermediate_chars
 	sub $cd
 	jr c, .dont_replace
-	cp "'v" - "'s" + 1
+	cp '\'v' - '\'s' + 1
 	jr nc, .dont_replace
-	add "'s"
+	add '\'s'

 .replace
 	ld [hl], a
--- a/engine/pokemon/evolve.asm
+++ b/engine/pokemon/evolve.asm
@ -360,7 +360,7 @@ UpdateSpeciesNameIfNotNicknamed:
 	cp [hl]
 	inc hl
 	ret nz
-	cp "@"
+	cp '@'
 	jr nz, .loop

 	ld a, [wCurPartyMon]
--- a/engine/pokemon/mail.asm
+++ b/engine/pokemon/mail.asm
@ -155,7 +155,7 @@ CheckPokeMail::
 	ld c, a
 	ld a, b
 	call GetFarByte
-	cp "@"
+	cp '@'
 	jr z, .done
 	cp c
 	ld a, POKEMAIL_WRONG_MAIL
@ -354,7 +354,7 @@ MailboxPC_GetMailAuthor:
 	push de
 	ld bc, NAME_LENGTH - 1
 	call CopyBytes
-	ld a, "@"
+	ld a, '@'
 	ld [de], a
 	call CloseSRAM
 	pop de
--- a/engine/pokemon/mail_2.asm
+++ b/engine/pokemon/mail_2.asm
@ -711,7 +711,7 @@ MailGFX_PlaceMessage:
 	ld de, wMonOrItemNameBuffer
 	ld bc, NAME_LENGTH - 1
 	call CopyBytes
-	ld a, "@"
+	ld a, '@'
 	ld [wTempMailAuthor], a
 	ld [wMonOrItemNameBuffer + NAME_LENGTH - 1], a
 	ld de, wTempMailMessage
--- a/engine/pokemon/mon_menu.asm
+++ b/engine/pokemon/mon_menu.asm
@ -171,7 +171,7 @@ SwitchPartyMons:
 	ld a, [wSwitchMon]
 	dec a
 	call AddNTimes
-	ld [hl], "▷"
+	ld [hl], '▷'
 	call WaitBGMap
 	call SetDefaultBGPAndOBP
 	call DelayFrame
@ -907,7 +907,7 @@ MoveScreenLoop:
 	jp .joy_loop

 .moving_move
-	ld a, " "
+	ld a, ' '
 	hlcoord 1, 11
 	ld bc, 5
 	call ByteFill
@ -1261,7 +1261,7 @@ PlaceMoveScreenLeftArrow:

 .legal
 	hlcoord 16, 0
-	ld [hl], "◀"
+	ld [hl], '◀'
 	ret

 PlaceMoveScreenRightArrow:
@ -1292,5 +1292,5 @@ PlaceMoveScreenRightArrow:

 .legal
 	hlcoord 18, 0
-	ld [hl], "▶"
+	ld [hl], '▶'
 	ret
--- a/engine/pokemon/mon_stats.asm
+++ b/engine/pokemon/mon_stats.asm
@ -71,7 +71,7 @@ DrawHP:
 	lb bc, 2, 3
 	call PrintNum

-	ld a, "/"
+	ld a, '/'
 	ld [hli], a

 ; Print max HP
@ -251,7 +251,7 @@ ListMovePP:
 	and a
 	jr z, .skip
 	ld c, a
-	ld a, "-"
+	ld a, '-'
 	call .load_loop

 .skip
@ -293,7 +293,7 @@ ListMovePP:
 	ld de, wStringBuffer1 + 4
 	lb bc, 1, 2
 	call PrintNum
-	ld a, "/"
+	ld a, '/'
 	ld [hli], a
 	ld de, wTempPP
 	lb bc, 1, 2
@ -472,7 +472,7 @@ ListMoves:
 	ld a, b
 .nonmove_loop
 	push af
-	ld [hl], "-"
+	ld [hl], '-'
 	ld a, [wListMovesLineSpacing]
 	ld c, a
 	ld b, 0
--- a/engine/pokemon/move_mon.asm
+++ b/engine/pokemon/move_mon.asm
@ -1717,7 +1717,7 @@ GivePoke::
 	ld [de], a
 	inc hl
 	inc de
-	cp "@"
+	cp '@'
 	jr nz, .otnameloop
 	ld a, [wScriptBank]
 	call GetFarByte
@ -1744,7 +1744,7 @@ GivePoke::
 	ld [de], a
 	inc hl
 	inc de
-	cp "@"
+	cp '@'
 	jr nz, .loop
 	ld a, [wScriptBank]
 	call GetFarByte
--- a/engine/pokemon/party_menu.asm
+++ b/engine/pokemon/party_menu.asm
@ -49,7 +49,7 @@ WritePartyMenuTilemap:
 	ldh [hBGMapMode], a
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill ; blank the tilemap
 	call GetPartyMenuQualityIndexes
 .loop
@ -204,7 +204,7 @@ PlacePartyMenuHPDigits:
 	lb bc, 2, 3
 	call PrintNum
 	pop de
-	ld a, "/"
+	ld a, '/'
 	ld [hli], a
 	inc de
 	inc de
@ -244,7 +244,7 @@ PlacePartyMonLevel:
 	ld a, [de]
 	cp 100 ; This is distinct from MAX_LEVEL.
 	jr nc, .ThreeDigits
-	ld a, "<LV>"
+	ld a, '<LV>'
 	ld [hli], a
 	lb bc, PRINTNUM_LEFTALIGN | 1, 2
 	; jr .okay
--- a/engine/pokemon/search_owned.asm
+++ b/engine/pokemon/search_owned.asm
@ -227,7 +227,7 @@ rept NAME_LENGTH_JAPANESE - 2
 	ld a, [de]
 	cp [hl]
 	jr nz, .notfound
-	cp "@"
+	cp '@'
 	jr z, .found
 	inc hl
 	inc de
--- a/engine/pokemon/stats_screen.asm
+++ b/engine/pokemon/stats_screen.asm
@ -425,9 +425,9 @@ StatsScreen_InitUpperHalf:
 	ld [wTextDecimalByte], a
 	ld [wCurSpecies], a
 	hlcoord 8, 0
-	ld [hl], "№"
+	ld [hl], '№'
 	inc hl
-	ld [hl], "."
+	ld [hl], '.'
 	inc hl
 	hlcoord 10, 0
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 3
@ -443,7 +443,7 @@ StatsScreen_InitUpperHalf:
 	hlcoord 18, 0
 	call .PlaceGenderChar
 	hlcoord 9, 4
-	ld a, "/"
+	ld a, '/'
 	ld [hli], a
 	ld a, [wBaseDexNo]
 	ld [wNamedObjectIndex], a
@ -476,9 +476,9 @@ StatsScreen_InitUpperHalf:
 	farcall GetGender
 	pop hl
 	ret c
-	ld a, "♂"
+	ld a, '♂'
 	jr nz, .got_gender
-	ld a, "♀"
+	ld a, '♀'
 .got_gender
 	ld [hl], a
 	ret
@ -514,9 +514,9 @@ StatsScreen_PlaceHorizontalDivider:

 StatsScreen_PlacePageSwitchArrows:
 	hlcoord 12, 6
-	ld [hl], "◀"
+	ld [hl], '◀'
 	hlcoord 19, 6
-	ld [hl], "▶"
+	ld [hl], '▶'
 	ret

 StatsScreen_PlaceShinyIcon:
@ -524,7 +524,7 @@ StatsScreen_PlaceShinyIcon:
 	farcall CheckShininess
 	ret nc
 	hlcoord 19, 0
-	ld [hl], "⁂"
+	ld [hl], '⁂'
 	ret

 StatsScreen_LoadGFX:
@ -599,7 +599,7 @@ LoadPinkPage:
 	and $f0
 	jr z, .NotImmuneToPkrs
 	hlcoord 8, 8
-	ld [hl], "." ; Pokérus immunity dot
+	ld [hl], '.' ; Pokérus immunity dot
 .NotImmuneToPkrs:
 	ld a, [wMonType]
 	cp BOXMON
@ -808,9 +808,9 @@ LoadBluePage:
 	cp $7f
 	jr z, .done
 	and CAUGHT_GENDER_MASK
-	ld a, "♂"
+	ld a, '♂'
 	jr z, .got_gender
-	ld a, "♀"
+	ld a, '♀'
 .got_gender
 	hlcoord 9, 13
 	ld [hl], a
@ -980,7 +980,7 @@ StatsScreen_LoadTextboxSpaceGFX:
 	ldh [rVBK], a
 	ld de, TextboxSpaceGFX
 	lb bc, BANK(TextboxSpaceGFX), 1
-	ld hl, vTiles2 tile " "
+	ld hl, vTiles2 tile ' '
 	call Get2bpp
 	pop af
 	ldh [rVBK], a
--- a/engine/pokemon/switchpartymons.asm
+++ b/engine/pokemon/switchpartymons.asm
@ -22,7 +22,7 @@ _SwitchPartyMons:
 	ld bc, 2 * SCREEN_WIDTH
 	call AddNTimes
 	ld bc, 2 * SCREEN_WIDTH
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	pop af
 	ld hl, wShadowOAMSprite00
--- a/engine/pokemon/types.asm
+++ b/engine/pokemon/types.asm
@ -29,7 +29,7 @@ PrintMonTypes:
 .hide_type_2
 	; Erase any type name that was here before.
 	; Seems to be pointless in localized versions.
-	ld a, " "
+	ld a, ' '
 	ld bc, SCREEN_WIDTH - 3
 	add hl, bc
 	ld [hl], a
--- a/engine/printer/print_party.asm
+++ b/engine/printer/print_party.asm
@ -1,4 +1,4 @@
-DEF PRINTPARTY_HP EQU "◀" ; $71
+DEF PRINTPARTY_HP EQU '◀' ; $71

 PrintPage1:
 	hlcoord 0, 0
@ -16,7 +16,7 @@ PrintPage1:
 	inc a ; $65
 	ld [hl], a
 	hlcoord 1, 9, wPrinterTilemapBuffer
-	ld a, " "
+	ld a, ' '
 	ld [hli], a
 	ld [hl], a
 	hlcoord 1, 10, wPrinterTilemapBuffer
@ -54,7 +54,7 @@ PrintPage1:
 PrintPage2:
 	hlcoord 0, 0, wPrinterTilemapBuffer
 	ld bc, 8 * SCREEN_WIDTH
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 0, 0, wPrinterTilemapBuffer
 	ld a, $36
@ -144,12 +144,12 @@ PrintPartyMonPage1:
 	call Request1bpp

 	ld de, GBPrinterLvIcon
-	ld hl, vTiles2 tile "<LV>"
+	ld hl, vTiles2 tile '<LV>'
 	lb bc, BANK(GBPrinterLvIcon), 1
 	call Request1bpp

 	ld de, StatsScreenPageTilesGFX + 14 tiles ; shiny icon
-	ld hl, vTiles2 tile "⁂"
+	ld hl, vTiles2 tile '⁂'
 	lb bc, BANK(StatsScreenPageTilesGFX), 1
 	call Get2bpp

@ -177,14 +177,14 @@ PrintPartyMonPage1:
 	hlcoord 8, 4
 	call PlaceString
 	hlcoord 9, 6
-	ld [hl], "/"
+	ld [hl], '/'
 	call GetPokemonName
 	hlcoord 10, 6
 	call PlaceString
 	hlcoord 8, 0
-	ld [hl], "№"
+	ld [hl], '№'
 	inc hl
-	ld [hl], "."
+	ld [hl], '.'
 	inc hl
 	ld de, wNamedObjectIndex
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 3
@ -309,11 +309,11 @@ PlaceMoveNameString:

 PlaceGenderAndShininess:
 	farcall GetGender
-	ld a, " "
+	ld a, ' '
 	jr c, .got_gender
-	ld a, "♂"
+	ld a, '♂'
 	jr nz, .got_gender
-	ld a, "♀"
+	ld a, '♀'

 .got_gender
 	hlcoord 17, 2
@ -322,7 +322,7 @@ PlaceGenderAndShininess:
 	farcall CheckShininess
 	ret nc
 	hlcoord 18, 2
-	ld [hl], "⁂"
+	ld [hl], '⁂'
 	ret

 PrintParty_OTString:
--- a/engine/printer/printer.asm
+++ b/engine/printer/printer.asm
@ -635,13 +635,13 @@ PrintPCBox_Page1:
 	ld [wWhichBoxMonToPrint], a
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	call Printer_PlaceEmptyBoxSlotString

 	hlcoord 0, 0
 	ld bc, 9 * SCREEN_WIDTH
-	ld a, " "
+	ld a, ' '
 	call ByteFill

 	call Printer_PlaceSideBorders
@ -672,7 +672,7 @@ PrintPCBox_Page1:
 PrintPCBox_Page2:
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	call Printer_PlaceEmptyBoxSlotString
 	call Printer_PlaceSideBorders
@ -689,7 +689,7 @@ PrintPCBox_Page2:
 PrintPCBox_Page3:
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	call Printer_PlaceEmptyBoxSlotString
 	call Printer_PlaceSideBorders
@ -706,7 +706,7 @@ PrintPCBox_Page3:
 PrintPCBox_Page4:
 	hlcoord 0, 0
 	ld bc, SCREEN_AREA
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	call Printer_PlaceEmptyBoxSlotString
 	hlcoord 1, 15
@ -744,7 +744,7 @@ Printer_PrintBoxListSegment:

 	push hl
 	ld bc, 16
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	pop hl

@ -764,12 +764,12 @@ Printer_PrintBoxListSegment:
 	call Printer_GetMonGender
 	ld bc, SCREEN_WIDTH - MON_NAME_LENGTH
 	add hl, bc
-	ld a, "/"
+	ld a, '/'
 	ld [hli], a

 	push hl
 	ld bc, 14
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	pop hl

@ -846,11 +846,11 @@ Printer_GetMonGender:
 	ld a, TEMPMON
 	ld [wMonType], a
 	farcall GetGender
-	ld a, " "
+	ld a, ' '
 	jr c, .got_gender
-	ld a, "♂"
+	ld a, '♂'
 	jr nz, .got_gender
-	ld a, "♀"
+	ld a, '♀'
 .got_gender
 	pop hl
 	ld [hli], a
@ -872,15 +872,15 @@ Printer_GetBoxMonSpecies:

 Printer_PlaceTopBorder:
 	hlcoord 0, 0
-	ld a, "┌"
+	ld a, '┌'
 	ld [hli], a
-	ld a, "─"
+	ld a, '─'
 	ld c, SCREEN_WIDTH - 2
 .loop
 	ld [hli], a
 	dec c
 	jr nz, .loop
-	ld a, "┐"
+	ld a, '┐'
 	ld [hl], a
 	ret

@ -889,10 +889,10 @@ Printer_PlaceSideBorders:
 	ld de, SCREEN_WIDTH - 1
 	ld c, SCREEN_HEIGHT
 .loop
-	ld a, "│"
+	ld a, '│'
 	ld [hl], a
 	add hl, de
-	ld a, "│"
+	ld a, '│'
 	ld [hli], a
 	dec c
 	jr nz, .loop
@ -900,15 +900,15 @@ Printer_PlaceSideBorders:

 Printer_PlaceBottomBorders:
 	hlcoord 0, 17
-	ld a, "└"
+	ld a, '└'
 	ld [hli], a
-	ld a, "─"
+	ld a, '─'
 	ld c, SCREEN_WIDTH - 2
 .loop
 	ld [hli], a
 	dec c
 	jr nz, .loop
-	ld a, "┘"
+	ld a, '┘'
 	ld [hl], a
 	ret

--- a/engine/rtc/print_hours_mins.asm
+++ b/engine/rtc/print_hours_mins.asm
@ -37,10 +37,10 @@ PrintHoursMins:
 	push hl
 	pop de
 	pop hl
-	ld [hl], " "
+	ld [hl], ' '
 	lb bc, 1, 2
 	call PrintNum
-	ld [hl], ":"
+	ld [hl], ':'
 	inc hl
 	ld d, h
 	ld e, l
--- a/engine/rtc/reset_password.asm
+++ b/engine/rtc/reset_password.asm
@ -108,21 +108,21 @@ ClockResetPassword:
 	ld c, 5
 .loop3
 	ld a, [de]
-	add "0"
+	add '0'
 	ld [hli], a
 	inc de
 	dec c
 	jr nz, .loop3
 	hlcoord 14, 16
 	ld bc, 5
-	ld a, " "
+	ld a, ' '
 	call ByteFill
 	hlcoord 14, 16
 	ld a, [wStringBuffer2 + 5]
 	ld e, a
 	ld d, 0
 	add hl, de
-	ld [hl], "▲"
+	ld [hl], '▲'
 	ret

 .dpadinput
@ -243,7 +243,7 @@ ClockResetPassword:

 .ComponentFromString:
 	ld a, [hli]
-	cp "@"
+	cp '@'
 	ret z
 	add e
 	ld e, a
--- a/engine/rtc/restart_clock.asm
+++ b/engine/rtc/restart_clock.asm
@ -205,10 +205,10 @@ RestartClock:
 	decoord 11, 8
 	farcall PrintHoursMins
 	ld a, [wRestartClockPrevDivision]
-	lb de, " ", " "
+	lb de, ' ', ' '
 	call .PlaceChars
 	ld a, [wRestartClockCurDivision]
-	lb de, "▲", "▼"
+	lb de, '▲', '▼'
 	call .PlaceChars
 	ld a, [wRestartClockCurDivision]
 	ld [wRestartClockPrevDivision], a
--- a/engine/rtc/timeset.asm
+++ b/engine/rtc/timeset.asm
@ -1,5 +1,5 @@
-DEF TIMESET_UP_ARROW   EQU "♂" ; $ef
-DEF TIMESET_DOWN_ARROW EQU "♀" ; $f5
+DEF TIMESET_UP_ARROW   EQU '♂' ; $ef
+DEF TIMESET_DOWN_ARROW EQU '♀' ; $f5

 InitClock:
 ; Ask the player to set the time.
@ -170,7 +170,7 @@ SetHour:

 .okay
 	hlcoord 4, 9
-	ld a, " "
+	ld a, ' '
 	ld bc, 15
 	call ByteFill
 	hlcoord 4, 9
@ -204,7 +204,7 @@ DisplayHoursMinutesWithMinString: ; unreferenced
 	pop de
 	inc de
 	inc de
-	ld a, ":"
+	ld a, ':'
 	ld [de], a
 	inc de
 	push de
@ -259,7 +259,7 @@ SetMinutes:
 	ld [hl], a
 .finish_dpad
 	hlcoord 12, 9
-	ld a, " "
+	ld a, ' '
 	ld bc, 7
 	call ByteFill
 	hlcoord 12, 9
@ -281,7 +281,7 @@ DisplayMinutesWithMinString:

 PrintTwoDigitNumberLeftAlign:
 	push hl
-	ld a, " "
+	ld a, ' '
 	ld [hli], a
 	ld [hl], a
 	pop hl
@ -339,7 +339,7 @@ OakText_ResponseToSetTime:
 	ld a, [wInitHourBuffer]
 	ld c, a
 	call PrintHour
-	ld [hl], ":"
+	ld [hl], ':'
 	inc hl
 	ld de, wInitMinuteBuffer
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
@ -606,46 +606,46 @@ MrChrono: ; unreferenced
 	call UpdateTime

 	hlcoord 1, 14
-	ld [hl], "R"
+	ld [hl], 'R'
 	inc hl
-	ld [hl], "T"
+	ld [hl], 'T'
 	inc hl
-	ld [hl], " "
+	ld [hl], ' '
 	inc hl

 	ld de, hRTCDayLo
 	call .PrintTime

 	hlcoord 1, 16
-	ld [hl], "D"
+	ld [hl], 'D'
 	inc hl
-	ld [hl], "F"
+	ld [hl], 'F'
 	inc hl
-	ld [hl], " "
+	ld [hl], ' '
 	inc hl

 	ld de, wStartDay
 	call .PrintTime

-	ld [hl], " "
+	ld [hl], ' '
 	inc hl

 	ld a, [wDST]
 	bit DST_F, a
 	jr z, .off

-	ld [hl], "O"
+	ld [hl], 'O'
 	inc hl
-	ld [hl], "N"
+	ld [hl], 'N'
 	inc hl
 	jr .done

 .off
-	ld [hl], "O"
+	ld [hl], 'O'
 	inc hl
-	ld [hl], "F"
+	ld [hl], 'F'
 	inc hl
-	ld [hl], "F"
+	ld [hl], 'F'
 	inc hl

 .done
@ -660,12 +660,12 @@ MrChrono: ; unreferenced
 .PrintTime:
 	lb bc, 1, 3
 	call PrintNum
-	ld [hl], "."
+	ld [hl], '.'
 	inc hl
 	inc de
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
 	call PrintNum
-	ld [hl], ":"
+	ld [hl], ':'
 	inc hl
 	inc de
 	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
--- a/home/audio.asm
+++ b/home/audio.asm
@ -487,16 +487,16 @@ PlaceBCDNumberSprite:: ; unreferenced
 	ld b, a
 	swap a
 	and $f
-	add "0"
+	add '0'
 	ld [wShadowOAMSprite38TileID], a
 	ld a, b
 	and $f
-	add "0"
+	add '0'
 	ld [wShadowOAMSprite39TileID], a
 	ret

 .max
-	ld a, "9"
+	ld a, '9'
 	ld [wShadowOAMSprite38TileID], a
 	ld [wShadowOAMSprite39TileID], a
 	ret
--- a/home/copy_name.asm
+++ b/home/copy_name.asm
@ -8,6 +8,6 @@ CopyName2::
 	ld a, [de]
 	inc de
 	ld [hli], a
-	cp "@"
+	cp '@'
 	jr nz, .loop
 	ret
--- a/home/joypad.asm
+++ b/home/joypad.asm
@ -429,7 +429,7 @@ PromptButton::
 	ldh a, [hVBlankCounter]
 	and 1 << 4 ; blink every 2**4 = 16 frames
 	jr z, .cursor_off
-	ld a, "▼"
+	ld a, '▼'
 	jr .load_cursor_state

 .cursor_off
@ -443,7 +443,7 @@ BlinkCursor::
 	push bc
 	ld a, [hl]
 	ld b, a
-	ld a, "▼"
+	ld a, '▼'
 	cp b
 	pop bc
 	jr nz, .place_arrow
@ -455,7 +455,7 @@ BlinkCursor::
 	dec a
 	ldh [hObjectStructIndex], a
 	ret nz
-	ld a, "─"
+	ld a, '─'
 	ld [hl], a
 	ld a, -1
 	ldh [hMapObjectIndex], a
@ -478,6 +478,6 @@ BlinkCursor::
 	ret nz
 	ld a, 6
 	ldh [hObjectStructIndex], a
-	ld a, "▼"
+	ld a, '▼'
 	ld [hl], a
 	ret
--- a/Show More
+++ b/Show More
 @ -1 +1 @@
 .9.3
 .0.0