diff --git a/asm/include/main_0200CAFC.inc b/asm/include/main_0200CAFC.inc
index 7a644195..4cfcfc8a 100644
--- a/asm/include/main_0200CAFC.inc
+++ b/asm/include/main_0200CAFC.inc
@@ -16,6 +16,7 @@
 .public _020A18BC
 .public AVAILABLE_ITEMS_IN_GROUP_TABLE
 .public BAG_ITEMS_PTR_MIRROR
+.public BitstreamDebug
 .public CopyBitsFrom
 .public CopyBitsTo
 .public GetDungeonGroup
@@ -28,6 +29,8 @@
 .public GetItemPaletteId
 .public GetItemSellPrice
 .public GetThrownItemQuantityLimit
+.public InitBitstreamForRead
+.public InitBitstreamForWrite
 .public InitItem
 .public IsAuraBow
 .public IsItemValid
@@ -43,7 +46,4 @@
 .public strncpy
 .public sub_0200EB64
 .public sub_020238E0
-.public sub_02050974
-.public sub_02050990
-.public sub_020509BC
 .public vsprintf
diff --git a/asm/include/main_02010FC4.inc b/asm/include/main_02010FC4.inc
index fc07ff54..3cc2c39a 100644
--- a/asm/include/main_02010FC4.inc
+++ b/asm/include/main_02010FC4.inc
@@ -25,6 +25,7 @@
 .public _s32_div_f
 .public ApplyExclusiveItemStatBoosts
 .public BAG_ITEMS_PTR_MIRROR
+.public BitstreamDebug
 .public CALCIUM_STAT_BOOST
 .public ConvertStorageItemAtIdxToBulkItem
 .public CopyBitsFrom
@@ -62,6 +63,8 @@
 .public GINSENG_CHANCE_3
 .public GUMMI_STAT_BOOST
 .public HasMonsterBeenAttackedInDungeons
+.public InitBitstreamForRead
+.public InitBitstreamForWrite
 .public InitBulkItem
 .public IQ_GUMMI_GAIN_TABLE
 .public IRON_STAT_BOOST
@@ -95,9 +98,6 @@
 .public sub_0200D1F0
 .public sub_02010044
 .public sub_0201007C
-.public sub_02050974
-.public sub_02050990
-.public sub_020509BC
 .public sub_02054FB8
 .public sub_02054FEC
 .public sub_02055020
diff --git a/asm/include/main_0203C774.inc b/asm/include/main_0203C774.inc
index 4a416ff5..f405e996 100644
--- a/asm/include/main_0203C774.inc
+++ b/asm/include/main_0203C774.inc
@@ -159,6 +159,7 @@
 .public Arm9LoadUnkFieldNa0x2029EC8
 .public Arm9StoreUnkFieldNa0x2029ED8
 .public BAG_ITEMS_PTR_MIRROR
+.public BitstreamDebug
 .public CanMonsterUseMove
 .public CARD_Init
 .public CardBackupError
@@ -270,6 +271,8 @@
 .public GetWindowIdPageStart
 .public GetWindowIdSelectedItemOnPage
 .public HidePortraitBox
+.public InitBitstreamForRead
+.public InitBitstreamForWrite
 .public InitMenu
 .public InitMenuWithWindowExtraInfo
 .public InitMove
@@ -473,9 +476,6 @@
 .public sub_0204E154
 .public sub_0204E19C
 .public sub_0204F9B8
-.public sub_02050974
-.public sub_02050990
-.public sub_020509BC
 .public sub_02050C10
 .public sub_02050CF8
 .public sub_02050D84
diff --git a/asm/include/main_0204CDB8.inc b/asm/include/main_0204CDB8.inc
index 9ffc044c..b66b04c9 100644
--- a/asm/include/main_0204CDB8.inc
+++ b/asm/include/main_0204CDB8.inc
@@ -3,6 +3,7 @@
 .public _0209E010
 .public _0209E011
 .public ARM9_UNKNOWN_TABLE__NA_209E164
+.public BitstreamDebug
 .public CopyBitsFrom
 .public CopyBitsTo
 .public Debug_Print0
@@ -17,6 +18,8 @@
 .public GetDexNumber
 .public GetGameMode
 .public GLOBAL_PROGRESS_PTR
+.public InitBitstreamForRead
+.public InitBitstreamForWrite
 .public KAOMADO_FILEPATH
 .public KAOMADO_STREAM
 .public LoadScriptVariableValue
@@ -29,8 +32,5 @@
 .public SCENARIO_FLAG_BACKUP_DEBUG_MSG
 .public SCENARIO_FLAG_RESUME_DEBUG_MSG
 .public SetAdventureLogCompleted
-.public sub_02050974
-.public sub_02050990
-.public sub_020509BC
 .public VERSION_EXCLUSIVE_MONSTERS
 .public ZeroInitScriptVariable
diff --git a/asm/include/main_0204DB08.inc b/asm/include/main_0204DB08.inc
index 59785417..5d4870b0 100644
--- a/asm/include/main_0204DB08.inc
+++ b/asm/include/main_0204DB08.inc
@@ -1,13 +1,13 @@
 #pragma once
 .public ARM9_UNKNOWN_TABLE__NA_209E12C
+.public BitstreamDebug
 .public CopyBitsFrom
+.public InitBitstreamForRead
+.public InitBitstreamForWrite
 .public MemcpySimple
 .public sub_0204DA2C
 .public sub_0204E02C
 .public sub_0204E0A0
-.public sub_02050974
-.public sub_02050990
-.public sub_020509BC
 .public sub_0205C2A4
 .public sub_0205C548
 .public WONDER_MAIL_BITS_MAP
diff --git a/asm/include/main_0204DE7C.inc b/asm/include/main_0204DE7C.inc
index 68261d5e..5b4d198d 100644
--- a/asm/include/main_0204DE7C.inc
+++ b/asm/include/main_0204DE7C.inc
@@ -8,6 +8,7 @@
 .public _s32_div_f
 .public ApplyLevelUpBoostsToGroundMonster
 .public ARM9_UNKNOWN_TABLE__NA_209E280
+.public BitstreamDebug
 .public CLIENT_LEVEL_TABLE
 .public CopyLogFrom
 .public CopyLogTo
@@ -16,6 +17,8 @@
 .public GetGameMode
 .public GetResolvedPerformanceProgressFlag
 .public GetSosMailCount
+.public InitBitstreamForRead
+.public InitBitstreamForWrite
 .public InitDungeonInit
 .public LoadOptionsFromCtx
 .public LoadScriptVariableValue
@@ -33,9 +36,6 @@
 .public sub_0204F7A8
 .public sub_0204F9F4
 .public sub_0204FA0C
-.public sub_02050974
-.public sub_02050990
-.public sub_020509BC
 .public sub_0205633C
 .public sub_02056360
 .public sub_0205BB7C
diff --git a/asm/include/main_02059224.inc b/asm/include/main_02059224.inc
index cad09c0d..d71db7a1 100644
--- a/asm/include/main_02059224.inc
+++ b/asm/include/main_02059224.inc
@@ -1,7 +1,7 @@
 #pragma once
+.public BitstreamDebug
 .public CopyBitsFrom
+.public InitBitstreamForWrite
 .public ReadMonsterFromSave
-.public sub_02050974
-.public sub_020509BC
 .public sub_0205523C
 .public TEAM_MEMBER_TABLE_PTR
diff --git a/asm/include/main_0205956C.inc b/asm/include/main_0205956C.inc
index 9f7cf1ab..e766e272 100644
--- a/asm/include/main_0205956C.inc
+++ b/asm/include/main_0205956C.inc
@@ -1,17 +1,17 @@
 #pragma once
 .public _020A3498
 .public _020A3499
+.public BitstreamDebug
 .public Copy16BitsFrom
 .public Copy16BitsTo
 .public CopyBitsFrom
 .public CopyBitsTo
+.public InitBitstreamForRead
 .public memset
 .public sub_0200DF2C
 .public sub_0200DF74
 .public sub_02014B74
 .public sub_02014C20
-.public sub_02050990
-.public sub_020509BC
 .public sub_02051098
 .public sub_020510C0
 .public sub_020584F8
diff --git a/asm/include/main_0205EDA4.inc b/asm/include/main_0205EDA4.inc
index 43eccbcb..63f75b20 100644
--- a/asm/include/main_0205EDA4.inc
+++ b/asm/include/main_0205EDA4.inc
@@ -66,6 +66,7 @@
 .public _s32_div_f
 .public AlreadyHaveMission
 .public ARM9_UNKNOWN_TABLE__NA_20A68BC
+.public BitstreamDebug
 .public BulkItemToItem
 .public CAFE_MISSION_REWARD_TYPE_WEIGHTS
 .public CloseCollectionMenu
@@ -128,6 +129,8 @@
 .public GlobalProgressAlloc
 .public HandleSir0TranslationVeneer
 .public HasMonsterBeenAttackedInDungeons
+.public InitBitstreamForRead
+.public InitBitstreamForWrite
 .public InitKaomadoStream
 .public InitOptionsVeneer
 .public InitPreprocessorArgs
@@ -313,9 +316,6 @@
 .public sub_0204F1B4
 .public sub_0204F7A8
 .public sub_0204F9B8
-.public sub_02050974
-.public sub_02050990
-.public sub_020509BC
 .public sub_02052C3C
 .public sub_02052E2C
 .public sub_02055410
diff --git a/asm/include/overlay_01.inc b/asm/include/overlay_01.inc
index eb08ea7f..659f6fd8 100644
--- a/asm/include/overlay_01.inc
+++ b/asm/include/overlay_01.inc
@@ -7,6 +7,7 @@
 .public AllocateTemp1024ByteBufferFromPool
 .public ArrayCopy32
 .public BAG_ITEMS_PTR_MIRROR
+.public BitstreamDebug
 .public CardBackupError
 .public CheckParentMenuField0x1A0
 .public CheckSimpleMenuField0x1A0
@@ -81,6 +82,8 @@
 .public GetWindowIdSelectedItemOnPage
 .public InitAnimationControl
 .public InitAnimationControlWithSet__0201C0B0
+.public InitBitstreamForRead
+.public InitBitstreamForWrite
 .public InitMenu
 .public InitPreprocessorArgs
 .public IsAdvancedMenuActive
@@ -354,9 +357,6 @@
 .public sub_0204E644
 .public sub_0204E6A4
 .public sub_0204F9E0
-.public sub_02050974
-.public sub_02050990
-.public sub_020509BC
 .public sub_02050CD0
 .public sub_02052060
 .public sub_020547C8
diff --git a/asm/include/overlay_06.inc b/asm/include/overlay_06.inc
index cebda325..87c63365 100644
--- a/asm/include/overlay_06.inc
+++ b/asm/include/overlay_06.inc
@@ -1,6 +1,7 @@
 #pragma once
 .public AddMissionToJobList
 .public AlreadyHaveMission
+.public BitstreamDebug
 .public CanSendItem
 .public CountJobListMissions
 .public CreateJobSummary
@@ -13,6 +14,7 @@
 .public GetLanguageType
 .public GetMainTeamNameWithCheck
 .public GetReleasedStylus
+.public InitBitstreamForWrite
 .public IsMissionSuspendedAndValid
 .public IsMissionTypeSpecialEpisode
 .public IsSpecialEpisodeOpen
@@ -73,8 +75,6 @@
 .public sub_0204A018
 .public sub_0204A1CC
 .public sub_0204E210
-.public sub_02050974
-.public sub_020509BC
 .public sub_0205B440
 .public sub_0205D1F4
 .public sub_0205F5A8
diff --git a/asm/main_0200CAFC.s b/asm/main_0200CAFC.s
index 61c8a42f..94d34d40 100644
--- a/asm/main_0200CAFC.s
+++ b/asm/main_0200CAFC.s
@@ -832,7 +832,7 @@ WriteItemsToSave: ; 0x0200D95C
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050990
+	bl InitBitstreamForRead
 	mov r8, #0
 	ldr r6, _0200DC40 ; =BAG_ITEMS_PTR_MIRROR
 	mov fp, r8
@@ -1015,7 +1015,7 @@ _0200DB24:
 	add r1, r1, #0x1300
 	bl CopyBitsTo
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
 	ldmia sp!, {r3, r4, r5, r6, r7, r8, sb, sl, fp, pc}
@@ -1031,7 +1031,7 @@ ReadItemsFromSave: ; 0x0200DC44
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	mov r8, #0
 	ldr r6, _0200DF28 ; =BAG_ITEMS_PTR_MIRROR
 	mov fp, r8
@@ -1214,7 +1214,7 @@ _0200DE0C:
 	add r1, r1, #0x1300
 	bl CopyBitsFrom
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
 	ldmia sp!, {r3, r4, r5, r6, r7, r8, sb, sl, fp, pc}
diff --git a/asm/main_02010FC4.s b/asm/main_02010FC4.s
index dfbe89af..072fbe28 100644
--- a/asm/main_02010FC4.s
+++ b/asm/main_02010FC4.s
@@ -2637,7 +2637,7 @@ sub_02013190: ; 0x02013190
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	ldr r5, _020131EC ; =_022A4BD8
 	mov r7, #0
 	add r6, sp, #0
@@ -2651,7 +2651,7 @@ _020131BC:
 	cmp r7, #8
 	blt _020131BC
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
 	ldmia sp!, {r3, r4, r5, r6, r7, pc}
@@ -2667,7 +2667,7 @@ sub_020131F0: ; 0x020131F0
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050990
+	bl InitBitstreamForRead
 	ldr r5, _0201324C ; =_022A4BD8
 	mov r7, #0
 	add r6, sp, #0
@@ -2681,7 +2681,7 @@ _0201321C:
 	cmp r7, #8
 	blt _0201321C
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
 	ldmia sp!, {r3, r4, r5, r6, r7, pc}
diff --git a/asm/main_0203C774.s b/asm/main_0203C774.s
index 8de03d5b..a14b7e87 100644
--- a/asm/main_0203C774.s
+++ b/asm/main_0203C774.s
@@ -16968,7 +16968,7 @@ sub_0204A1DC: ; 0x0204A1DC
 	mov r2, r1
 	add r0, sp, #4
 	mov r1, r3
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	ldr r1, _0204A3E0 ; =_020AFF6C
 	add r0, sp, #4
 	ldr r1, [r1]
@@ -17107,7 +17107,7 @@ _0204A298:
 	moveq r2, #0
 	add r0, sp, #4
 	strb r2, [r1, #0x1ed + SUB_0204A1DC_OFFSET]
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #0xc]
 	add sp, sp, #0x14
 	ldmia sp!, {r3, r4, r5, r6, r7, r8, sb, sl, pc}
@@ -17132,7 +17132,7 @@ sub_0204A3E4: ; 0x0204A3E4
 	mov r1, r5
 	strb r4, [sp, #1]
 	strb r3, [sp]
-	bl sub_02050990
+	bl InitBitstreamForRead
 	ldr r1, _0204A5CC ; =_020AFF6C
 	add r0, sp, #4
 	ldr r1, [r1]
@@ -17260,7 +17260,7 @@ _0204A4AC:
 	add r0, sp, #4
 	bl CopyBitsTo
 	add r0, sp, #4
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #0xc]
 	add sp, sp, #0x14
 	ldmia sp!, {r4, r5, r6, r7, r8, sb, pc}
diff --git a/asm/main_0204CDB8.s b/asm/main_0204CDB8.s
index d01c6edf..1bcd0a03 100644
--- a/asm/main_0204CDB8.s
+++ b/asm/main_0204CDB8.s
@@ -634,11 +634,11 @@ CopyProgressInfoFromScratchTo: ; 0x0204D548
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050990
+	bl InitBitstreamForRead
 	add r0, sp, #0
 	bl CopyProgressInfoTo
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
 	ldmia sp!, {r3, pc}
@@ -780,11 +780,11 @@ CopyProgressInfoFromScratchFrom: ; 0x0204D748
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	add r0, sp, #0
 	bl CopyProgressInfoFrom
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
 	ldmia sp!, {r3, pc}
diff --git a/asm/main_0204DB08.s b/asm/main_0204DB08.s
index e007be34..b5f7947d 100644
--- a/asm/main_0204DB08.s
+++ b/asm/main_0204DB08.s
@@ -15,7 +15,7 @@ sub_0204DB08: ; 0x0204DB08
 	mov r5, r0
 	add r0, sp, #0x38
 	add r2, r2, r3, asr #3
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	mov sb, #0
 	add r8, sp, #0x38
 	add r7, sp, #0
@@ -31,7 +31,7 @@ _0204DB5C:
 	cmp sb, r4
 	blt _0204DB48
 	add r0, sp, #0x38
-	bl sub_020509BC
+	bl BitstreamDebug
 	mov r3, #0
 	add r2, sp, #0
 	ldr r1, _0204DB9C ; =WONDER_MAIL_BITS_MAP
@@ -111,12 +111,12 @@ _0204DC3C:
 	add r0, sp, #0
 	add r1, sp, #0x7d
 	mov r2, #0x20
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	add r0, sp, #0
 	mov r1, r5
 	bl sub_0205C2A4
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	mov r0, #1
 _0204DC94:
 	add sp, sp, #0xa0
@@ -143,12 +143,12 @@ _0204DCC0:
 	add r0, sp, #0
 	add r1, sp, #0x7d
 	mov r2, #0x20
-	bl sub_02050990
+	bl InitBitstreamForRead
 	add r0, sp, #0
 	mov r1, r6
 	bl sub_0205C548
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	mov r3, #1
 	add r2, sp, #0x7c
 _0204DCFC:
diff --git a/asm/main_0204DE7C.s b/asm/main_0204DE7C.s
index b4f725bb..73635d44 100644
--- a/asm/main_0204DE7C.s
+++ b/asm/main_0204DE7C.s
@@ -20,13 +20,13 @@ _0204DE98:
 	add r0, sp, #0
 	add r1, sp, #0x58
 	mov r2, #0x11
-	bl sub_02050990
+	bl InitBitstreamForRead
 	add r0, sp, #0
 	mov r1, r5
 	mov r2, #1
 	bl sub_0205FE80
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	add r0, sp, #0x58
 	mov r1, #0x11
 	bl sub_02004F80
@@ -251,7 +251,7 @@ sub_0204E154: ; 0x0204E154
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050990
+	bl InitBitstreamForRead
 	add r0, sp, #0
 	bl SaveOptionsToCtx
 	add r0, sp, #0
@@ -259,7 +259,7 @@ sub_0204E154: ; 0x0204E154
 	add r0, sp, #0
 	bl CopyLogTo
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
 	ldmia sp!, {r3, pc}
@@ -273,7 +273,7 @@ sub_0204E19C: ; 0x0204E19C
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	add r0, sp, #0
 	bl LoadOptionsFromCtx
 	add r0, sp, #0
@@ -281,7 +281,7 @@ sub_0204E19C: ; 0x0204E19C
 	add r0, sp, #0
 	bl CopyLogFrom
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
 	ldmia sp!, {r3, pc}
diff --git a/asm/main_0204FE58.s b/asm/main_0204FE58.s
index b025808c..6d0ec574 100644
--- a/asm/main_0204FE58.s
+++ b/asm/main_0204FE58.s
@@ -888,8 +888,8 @@ GetConversion2ConvertToType: ; 0x02050964
 _02050970: .word _020A192C
 	arm_func_end GetConversion2ConvertToType
 
-	arm_func_start sub_02050974
-sub_02050974: ; 0x02050974
+	arm_func_start InitBitstreamForWrite
+InitBitstreamForWrite: ; 0x02050974
 	str r1, [r0]
 	mov r3, #0
 	str r3, [r0, #8]
@@ -897,10 +897,10 @@ sub_02050974: ; 0x02050974
 	add r1, r1, r2
 	str r1, [r0, #4]
 	bx lr
-	arm_func_end sub_02050974
+	arm_func_end InitBitstreamForWrite
 
-	arm_func_start sub_02050990
-sub_02050990: ; 0x02050990
+	arm_func_start InitBitstreamForRead
+InitBitstreamForRead: ; 0x02050990
 	str r1, [r0]
 	mov r3, #0
 	str r3, [r0, #8]
@@ -913,12 +913,12 @@ sub_02050990: ; 0x02050990
 	bx ip
 	.align 2, 0
 _020509B8: .word MemZero
-	arm_func_end sub_02050990
+	arm_func_end InitBitstreamForRead
 
-	arm_func_start sub_020509BC
-sub_020509BC: ; 0x020509BC
+	arm_func_start BitstreamDebug
+BitstreamDebug: ; 0x020509BC
 	bx lr
-	arm_func_end sub_020509BC
+	arm_func_end BitstreamDebug
 
 	arm_func_start CopyBitsTo
 CopyBitsTo: ; 0x020509C0
@@ -1249,7 +1249,7 @@ sub_02050CF8: ; 0x02050CF8
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050990
+	bl InitBitstreamForRead
 	ldr r1, _02050D70 ; =TEAM_NAME
 	add r0, sp, #0
 #ifdef JAPAN
@@ -1277,7 +1277,7 @@ sub_02050CF8: ; 0x02050CF8
 	mov r2, #1
 	bl CopyBitsTo
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
 	ldmia sp!, {r3, pc}
@@ -1297,7 +1297,7 @@ sub_02050D84: ; 0x02050D84
 	mov r2, r1
 	add r0, sp, #4
 	mov r1, r3
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	ldr r1, _02050DFC ; =TEAM_NAME
 	add r0, sp, #4
 #ifdef JAPAN
@@ -1325,7 +1325,7 @@ sub_02050D84: ; 0x02050D84
 #else
 	strb r2, [r1, #0x10]
 #endif
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #0xc]
 	add sp, sp, #0x14
 	ldmia sp!, {pc}
diff --git a/asm/main_02059224.s b/asm/main_02059224.s
index 474844f5..5b558f04 100644
--- a/asm/main_02059224.s
+++ b/asm/main_02059224.s
@@ -11,7 +11,7 @@ ReadMonsterInfoFromSave: ; 0x02059224
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	ldr r6, _0205932C ; =TEAM_MEMBER_TABLE_PTR
 	ldr r5, _02059330 ; =0x0000022B
 	mov r8, #0
@@ -68,7 +68,7 @@ _020592F0:
 	cmp r7, #4
 	blt _020592F0
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	bl sub_0205523C
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
diff --git a/asm/main_0205956C.s b/asm/main_0205956C.s
index 4d18aa13..2e7ed72f 100644
--- a/asm/main_0205956C.s
+++ b/asm/main_0205956C.s
@@ -163,7 +163,7 @@ sub_020597B0: ; 0x020597B0
 	mov r2, r1
 	add r0, sp, #8
 	mov r1, r3
-	bl sub_02050990
+	bl InitBitstreamForRead
 	add r0, sp, #8
 	mov r1, #0
 	bl sub_0205956C
@@ -174,7 +174,7 @@ sub_020597B0: ; 0x020597B0
 	mov r1, #2
 	bl sub_0205956C
 	add r0, sp, #8
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r1, _02059820 ; =_020A3498
 	add r0, sp, #0
 	ldr r2, [r1, #0x10]
diff --git a/asm/main_0205EDA4.s b/asm/main_0205EDA4.s
index 82cbee3c..9755902c 100644
--- a/asm/main_0205EDA4.s
+++ b/asm/main_0205EDA4.s
@@ -1054,7 +1054,7 @@ sub_0205FAB0: ; 0x0205FAB0
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	mov r7, #0
 	ldr r4, _0205FC1C ; =MISSION_DELIVER_LIST_PTR
 	add r6, sp, #0
@@ -1137,7 +1137,7 @@ _0205FBAC:
 	cmp r8, #0x10
 	blt _0205FBAC
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	bl Rand16Bit
 	bl sub_020634F4
 	ldr r0, [sp, #8]
@@ -1155,7 +1155,7 @@ sub_0205FC20: ; 0x0205FC20
 	mov r2, r1
 	add r0, sp, #0
 	mov r1, r3
-	bl sub_02050990
+	bl InitBitstreamForRead
 	mov r7, #0
 	ldr r4, _0205FD84 ; =MISSION_DELIVER_LIST_PTR
 	add r6, sp, #0
@@ -1238,7 +1238,7 @@ _0205FD1C:
 	cmp r8, #0x10
 	blt _0205FD1C
 	add r0, sp, #0
-	bl sub_020509BC
+	bl BitstreamDebug
 	ldr r0, [sp, #8]
 	add sp, sp, #0x10
 	ldmia sp!, {r4, r5, r6, r7, r8, sb, sl, pc}
diff --git a/asm/overlay_01.s b/asm/overlay_01.s
index 16a9ea2d..4747dd0f 100644
--- a/asm/overlay_01.s
+++ b/asm/overlay_01.s
@@ -5087,7 +5087,7 @@ ov01_0232D3C4: ; 0x0232D3C4
 	orr r7, r7, ip
 	orr r3, r3, r7
 	str r3, [r6, #0x24]
-	bl sub_02050990
+	bl InitBitstreamForRead
 	cmp r4, #0
 	add r0, sp, #4
 	beq _0232D4E0
@@ -5109,7 +5109,7 @@ _0232D4E0:
 	bl CopyBitsTo
 _0232D4F4:
 	add r0, sp, #4
-	bl sub_020509BC
+	bl BitstreamDebug
 	add r0, r6, #0x68
 	add r1, r5, #0x32
 	mov r2, #0x12
@@ -5183,7 +5183,7 @@ ov01_0232D5C4: ; 0x0232D5C4
 	add r0, sp, #4
 	add r1, r6, #0x50
 	mov r2, #0x40
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	add r0, sp, #4
 	add r1, sp, #0
 	mov r2, #1
@@ -5213,7 +5213,7 @@ ov01_0232D5C4: ; 0x0232D5C4
 	bl ov01_0232E58C
 _0232D650:
 	add r0, sp, #4
-	bl sub_020509BC
+	bl BitstreamDebug
 	mov r0, r4
 	add sp, sp, #0x14
 	ldmia sp!, {r3, r4, r5, r6, pc}
@@ -5520,7 +5520,7 @@ ov01_0232DA1C: ; 0x0232DA1C
 	add r1, r7, #0xc
 	add r0, sp, #0xc
 	mov r2, #0x100
-	bl sub_02050990
+	bl InitBitstreamForRead
 	add r0, sp, #2
 	mov r1, #0
 	bl sub_02057030
@@ -5528,7 +5528,7 @@ ov01_0232DA1C: ; 0x0232DA1C
 	tst r0, #0xff
 	add r0, sp, #0xc
 	bne _0232DADC
-	bl sub_020509BC
+	bl BitstreamDebug
 	mov r0, #0
 	b _0232DB8C
 _0232DADC:
@@ -5579,7 +5579,7 @@ _0232DB74:
 	blt _0232DAFC
 _0232DB80:
 	add r0, sp, #0xc
-	bl sub_020509BC
+	bl BitstreamDebug
 	mov r0, r4
 _0232DB8C:
 	add sp, sp, #0x68
@@ -5758,7 +5758,7 @@ _0232DD2C:
 	add r1, sl, #0x24
 	add r0, sp, #4
 	mov r2, #0x100
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	add r0, sp, #4
 	add r1, sp, #0
 	mov r2, #3
@@ -5788,7 +5788,7 @@ _0232DE50:
 	cmp r3, #4
 	blt _0232DE44
 	add r0, sp, #4
-	bl sub_020509BC
+	bl BitstreamDebug
 	add sb, sb, #1
 _0232DE64:
 	cmp sb, r5
@@ -5898,7 +5898,7 @@ ov01_0232DF18: ; 0x0232DF18
 	add r0, sp, #4
 	add r1, r5, #0x24
 	mov r2, #0x100
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	add r0, sp, #4
 	add r1, sp, #0
 	mov r2, #3
@@ -5929,7 +5929,7 @@ _0232E020:
 	cmp r3, #4
 	blt _0232E014
 	add r0, sp, #4
-	bl sub_020509BC
+	bl BitstreamDebug
 	add sp, sp, #0x14
 	ldmia sp!, {r3, r4, r5, r6, r7, r8, pc}
 	arm_func_end ov01_0232DF18
@@ -6017,7 +6017,7 @@ ov01_0232E0A4: ; 0x0232E0A4
 	add r0, sp, #4
 	add r1, r5, #0x24
 	mov r2, #0x100
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	add r0, sp, #4
 	add r1, sp, #0
 	mov r2, #3
@@ -6048,7 +6048,7 @@ _0232E1AC:
 	cmp r3, #4
 	blt _0232E1A0
 	add r0, sp, #4
-	bl sub_020509BC
+	bl BitstreamDebug
 	add sp, sp, #0x14
 	ldmia sp!, {r3, r4, r5, r6, r7, r8, pc}
 	arm_func_end ov01_0232E0A4
diff --git a/asm/overlay_06.s b/asm/overlay_06.s
index a8ed66d5..75a7f40b 100644
--- a/asm/overlay_06.s
+++ b/asm/overlay_06.s
@@ -1712,7 +1712,7 @@ _0233E07C:
 	ldr r2, [sp, #8]
 	add r1, r7, #0x20
 	add r0, sp, #0x30
-	bl sub_02050974
+	bl InitBitstreamForWrite
 	ldr r1, [r4]
 	add r0, sp, #0x30
 	add r1, r1, #0x18
@@ -1721,7 +1721,7 @@ _0233E07C:
 	mov r2, #0
 	bl sub_0205FD88
 	add r0, sp, #0x30
-	bl sub_020509BC
+	bl BitstreamDebug
 	mov r0, r7
 	bl IsMissionTypeSpecialEpisode
 	cmp r0, #0
diff --git a/src/main_0204DA2C.c b/src/main_0204DA2C.c
index cc035c7b..91d3fa3a 100644
--- a/src/main_0204DA2C.c
+++ b/src/main_0204DA2C.c
@@ -3,9 +3,9 @@
 
 extern u8 ARM9_UNKNOWN_TABLE__NA_209E164[];
 
-extern void sub_02050990(u8*, u8*, s32);
+extern void InitBitstreamForRead(u8*, u8*, s32);
 extern void CopyBitsTo(u8* write_info, void* buf_write, s32 nbits);
-extern void sub_020509BC(u8*);
+extern void BitstreamDebug(u8*);
 
 s32 sub_0204DA2C(u8* arg0, void* arg1, u8 arg2)
 {
@@ -28,13 +28,13 @@ s32 sub_0204DA2C(u8* arg0, void* arg1, u8 arg2)
 
     s32 v1 = arg2 * 5;
     s32 v2 = (v1 & 7) + 7;
-    sub_02050990(tmp3, tmp1, (v1 >> 3) + (v2 >> 3));
+    InitBitstreamForRead(tmp3, tmp1, (v1 >> 3) + (v2 >> 3));
 
     for (int i = 0; i < arg2; i++) {
         CopyBitsTo(tmp3, &tmp2[i], 5);
     }
 
-    sub_020509BC(tmp3);
+    BitstreamDebug(tmp3);
     MemcpySimple(arg1, tmp1, (v1 >> 3) + (v2 >> 3));
     return 1;
 }
diff --git a/src/main_0204DD80.c b/src/main_0204DD80.c
index b621ec81..9549c07c 100644
--- a/src/main_0204DD80.c
+++ b/src/main_0204DD80.c
@@ -8,9 +8,9 @@ extern u8 _0209E264[];
 extern u8 sub_0204DA2C(u8(*)[34], UnkStruct_WonderMailPasswordToMission*, s32);
 extern void sub_0204E0A0(u8, u8*, s32);
 extern s32 sub_02004F80(u8*, s32);
-extern void sub_02050974(u8*, u8*, s32);
+extern void InitBitstreamForWrite(u8*, u8*, s32);
 extern void sub_0205FD88(u8*, u32, s32);
-extern void sub_020509BC(u8*);
+extern void BitstreamDebug(u8*);
 
 s32 WonderMailPasswordToMission(u8* param_1, u32 param_2)
 {
@@ -41,9 +41,9 @@ s32 WonderMailPasswordToMission(u8* param_1, u32 param_2)
 		s32 uVar2 = sub_02004F80(ctx.auStack_20, 0x11);
 		Debug_Print0(_0209E264, uVar2, ctx.y);
 		if (ctx.x == uVar2) {
-			sub_02050974(auStack_78, ctx.auStack_20, 0x11);
+			InitBitstreamForWrite(auStack_78, ctx.auStack_20, 0x11);
 			sub_0205FD88(auStack_78, param_2, 1);
-			sub_020509BC(auStack_78);
+			BitstreamDebug(auStack_78);
 			ret = 1;
 		} else {
 			ret = 0;
diff --git a/src/main_02059060.c b/src/main_02059060.c
index 8ce15a4a..1aa4e121 100644
--- a/src/main_02059060.c
+++ b/src/main_02059060.c
@@ -7,10 +7,10 @@ extern struct team_member_table *TEAM_MEMBER_TABLE_PTR;
 
 extern s32 GetLanguageType(void);
 extern void StrncpySimpleNoPadSafe(u8* dest, const u8* src, u32 n);
-extern void sub_02050990(struct WriteMonsterInfoToSave_struct *ptr, void *start_addr, u32 total_len);
+extern void InitBitstreamForRead(struct WriteMonsterInfoToSave_struct *ptr, void *start_addr, u32 total_len);
 extern void WriteMonsterToSave(struct WriteMonsterInfoToSave_struct *write_info, struct ground_monster *monster);
 extern void CopyBitsTo(void *ctx, void *src, s32 nbits);
-extern void sub_020509BC(struct WriteMonsterInfoToSave_struct *ptr);
+extern void BitstreamDebug(struct WriteMonsterInfoToSave_struct *ptr);
 
 void GetExplorerMazeTeamName(u8 *dest)
 {
@@ -55,7 +55,7 @@ s32 WriteMonsterInfoToSave(void* start_addr, u32 total_len)
 {
     struct WriteMonsterInfoToSave_struct local_struct;
 
-    sub_02050990(&local_struct, start_addr, total_len);
+    InitBitstreamForRead(&local_struct, start_addr, total_len);
 
     for (s32 i = 0; i < MAX_GROUND_TEAM_MEMBERS; i++)
     {
@@ -72,7 +72,7 @@ s32 WriteMonsterInfoToSave(void* start_addr, u32 total_len)
         WriteMonsterToSave(&local_struct, &TEAM_MEMBER_TABLE_PTR->explorer_maze_monsters[i]);
     }
 
-    sub_020509BC(&local_struct);
+    BitstreamDebug(&local_struct);
 
     return local_struct.result;
 }
diff --git a/src/main_02059A74.c b/src/main_02059A74.c
index 4a81fa5c..8ab9eff0 100644
--- a/src/main_02059A74.c
+++ b/src/main_02059A74.c
@@ -3,9 +3,9 @@
 
 extern u32 _020A3498[];
 
-extern void sub_02050974(void *v0, u32 v1, u32 v2);
+extern void InitBitstreamForWrite(void *v0, u32 v1, u32 v2);
 extern void sub_02059824(void *v0, u32 v1);
-extern void sub_020509BC(void *v0);
+extern void BitstreamDebug(void *v0);
 extern void sub_020584F8(void *v0);
 extern void CopyBitsFrom(void *read_info, void *buf_read, s32 nbits);
 extern void CopyBitsTo(void *ctx, void *src, s32 nbits);
@@ -15,11 +15,11 @@ u32 sub_02059A74(u32 a, u32 b)
     u32 obj1[4];
     u32 obj2[2];
 
-    sub_02050974(obj1, a, b);
+    InitBitstreamForWrite(obj1, a, b);
     sub_02059824(obj1, 0);
     sub_02059824(obj1, 1);
     sub_02059824(obj1, 2);
-    sub_020509BC(obj1);
+    BitstreamDebug(obj1);
 
     obj2[1] = _020A3498[2];
     obj2[0] = _020A3498[1];
diff --git a/src/main_0205BD14.c b/src/main_0205BD14.c
index fad75ca1..14ea5e2f 100644
--- a/src/main_0205BD14.c
+++ b/src/main_0205BD14.c
@@ -9,14 +9,14 @@
 extern union unkStruct_020B0A54_union _020B0A54;
 extern u32 _022B57BC;
 
-extern void sub_02050974(void *v0, u32 v1, u32 v2);
+extern void InitBitstreamForWrite(void *v0, u32 v1, u32 v2);
 extern void CopyBitsFrom(void *read_info, void *buf_read, s32 nbits);
 extern void* memset(void *s, s32 c, u32 n);
 extern void Copy16BitsFrom(void *read_info, void *buf_read);
 extern void CopyMovesetFrom(struct WriteMonsterInfoToSave_struct *read_info, void *dst);
-extern void sub_020509BC(struct WriteMonsterInfoToSave_struct *write_info);
+extern void BitstreamDebug(struct WriteMonsterInfoToSave_struct *write_info);
 extern void sub_020634F4(void);
-extern void sub_02050990(struct WriteMonsterInfoToSave_struct *write_info, u32 p1, u32 p2);
+extern void InitBitstreamForRead(struct WriteMonsterInfoToSave_struct *write_info, u32 p1, u32 p2);
 extern void CopyBitsTo(void *write_info, void* buf_write, s32 nbits);
 extern void Copy16BitsTo(void *write_info, void *buf_write);
 extern void CopyMovesetTo(struct WriteMonsterInfoToSave_struct *write_info, void *buffer_write);
@@ -55,7 +55,7 @@ u32 sub_0205BD9C(u32 arg0, u32 arg1)
 {
     struct WriteMonsterInfoToSave_struct temp;
 
-    sub_02050974(&temp, arg0, arg1);
+    InitBitstreamForWrite(&temp, arg0, arg1);
     CopyBitsFrom(&temp, &_022B57BC, 32);
 
     for (s32 i = 0; i < 32; i++)
@@ -96,7 +96,7 @@ u32 sub_0205BD9C(u32 arg0, u32 arg1)
         CopyBitsFrom(&temp, _020B0A54.fp[1] + 4 + (i * 8), 64);
     }
 
-    sub_020509BC(&temp);
+    BitstreamDebug(&temp);
     Rand16Bit();
     sub_020634F4();
 
@@ -107,7 +107,7 @@ u32 sub_0205BFB0(u32 p0, u32 p1)
 {
     struct WriteMonsterInfoToSave_struct stack_var;
 
-    sub_02050990(&stack_var, p0, p1);
+    InitBitstreamForRead(&stack_var, p0, p1);
     CopyBitsTo(&stack_var, &_022B57BC, 32);
 
     for (s32 i = 0; i < 32; i++)
@@ -145,7 +145,7 @@ u32 sub_0205BFB0(u32 p0, u32 p1)
         CopyBitsTo(&stack_var, _020B0A54.fp[1] + 4 + (i * 8), 64);
     }
 
-    sub_020509BC(&stack_var);
+    BitstreamDebug(&stack_var);
 
     return stack_var.result;
 }