diff --git a/asm/include/overlay_29_02300108.inc b/asm/include/overlay_29_0230027C.inc
similarity index 87%
rename from asm/include/overlay_29_02300108.inc
rename to asm/include/overlay_29_0230027C.inc
index 7cbd4f92..08e85c62 100644
--- a/asm/include/overlay_29_02300108.inc
+++ b/asm/include/overlay_29_0230027C.inc
@@ -3,6 +3,8 @@
 .public DUNGEON_PTR
 .public GetActiveTeamMember
 .public GetExplorerMazeMonster
+.public GetMonsterDisplayNameType
+.public GetMonsterName
 .public GetName
 .public GetNameRaw
 .public GetNameWithGender
diff --git a/asm/overlay_29_02300108.s b/asm/overlay_29_0230027C.s
similarity index 51%
rename from asm/overlay_29_02300108.s
rename to asm/overlay_29_0230027C.s
index f7e70270..506bfe09 100644
--- a/asm/overlay_29_02300108.s
+++ b/asm/overlay_29_0230027C.s
@@ -1,206 +1,8 @@
 	.include "asm/macros.inc"
-	.include "overlay_29_02300108.inc"
+	.include "overlay_29_0230027C.inc"
 
 	.text
 
-#ifndef JAPAN
-	arm_func_start GetMonsterDisplayNameType
-GetMonsterDisplayNameType: ; 0x02300108
-	ldr r1, _02300160 ; =DUNGEON_PTR
-	ldr r1, [r1]
-	add r1, r1, #0x1a000
-	ldrb r2, [r1, #0x23e]
-	cmp r2, #0
-	ldreqb r2, [r1, #0x245]
-	cmpeq r2, #0
-	bne _0230013C
-	ldrb r1, [r1, #0x244]
-	cmp r1, #0
-	ldreqb r1, [r0, #0xef]
-	cmpeq r1, #1
-	bne _0230014C
-_0230013C:
-	ldrb r1, [r0, #6]
-	cmp r1, #0
-	movne r0, #1
-	bxne lr
-_0230014C:
-	ldrb r0, [r0, #0xd8]
-	cmp r0, #2
-	moveq r0, #2
-	movne r0, #0
-	bx lr
-	.align 2, 0
-_02300160: .word DUNGEON_PTR
-	arm_func_end GetMonsterDisplayNameType
-#endif
-
-	arm_func_start GetMonsterName
-GetMonsterName: ; 0x02300164
-#ifdef JAPAN
-	stmdb sp!, {r4, lr}
-	ldr r2, _02301678 ; =DUNGEON_PTR
-	mov r4, r0
-	ldr r0, [r2]
-	add r0, r0, #0x1a000
-	ldrb r2, [r0, #0x19a]
-	cmp r2, #0
-	ldreqb r2, [r0, #0x1a1]
-	cmpeq r2, #0
-	bne _02301574
-	ldrb r0, [r0, #0x1a0]
-	cmp r0, #0
-	ldreqb r0, [r1, #0xef]
-	cmpeq r0, #1
-	bne _02300190
-_02301574:
-	ldrb r0, [r1, #6]
-	cmp r0, #0
-	beq _02300190
-	ldr r1, _02300274 ; =0x00000C34
-	mov r0, r4
-	bl CopyStringFromId
-	ldmia sp!, {r4, pc}
-_02300190:
-	ldrb r0, [r1, #0xd8]
-#else
-	stmdb sp!, {r3, r4, r5, lr}
-	mov r4, r1
-	mov r5, r0
-	mov r0, r4
-	bl GetMonsterDisplayNameType
-	cmp r0, #1
-	bne _02300190
-	ldr r1, _02300274 ; =0x00000C34
-	mov r0, r5
-	bl CopyStringFromId
-	ldmia sp!, {r3, r4, r5, pc}
-_02300190:
-#endif
-	cmp r0, #2
-	bne _023001A8
-	ldr r1, _02300278 ; =0x00000C32
-#ifdef JAPAN
-	mov r0, r4
-	bl CopyStringFromId
-	ldmia sp!, {r4, pc}
-_023001A8:
-	ldrb r0, [r1, #6]
-	cmp r0, #0
-	beq _0230025C
-	ldrb r0, [r1, #0xbc]
-#else
-	mov r0, r5
-	bl CopyStringFromId
-	ldmia sp!, {r3, r4, r5, pc}
-_023001A8:
-	ldrb r0, [r4, #6]
-	cmp r0, #0
-	beq _0230025C
-	ldrb r0, [r4, #0xbc]
-#endif
-	cmp r0, #0xb
-	bne _023001DC
-	mov r0, #0
-	bl GetExplorerMazeMonster
-	mov r1, r0
-#ifdef JAPAN
-	mov r0, r4
-	mov r2, #0x4e
-	bl sub_02056084
-	ldmia sp!, {r4, pc}
-#else
-	mov r0, r5
-	mov r2, #0x4e
-	bl sub_02056084
-	ldmia sp!, {r3, r4, r5, pc}
-#endif
-_023001DC:
-	cmp r0, #0xc
-	bne _02300200
-	mov r0, #1
-	bl GetExplorerMazeMonster
-	mov r1, r0
-#ifdef JAPAN
-	mov r0, r4
-	mov r2, #0x4e
-	bl sub_02056084
-	ldmia sp!, {r4, pc}
-#else
-	mov r0, r5
-	mov r2, #0x4e
-	bl sub_02056084
-	ldmia sp!, {r3, r4, r5, pc}
-#endif
-_02300200:
-	cmp r0, #0xd
-	bne _02300224
-	mov r0, #2
-	bl GetExplorerMazeMonster
-	mov r1, r0
-#ifdef JAPAN
-	mov r0, r4
-	mov r2, #0x4e
-	bl sub_02056084
-	ldmia sp!, {r4, pc}
-#else
-	mov r0, r5
-	mov r2, #0x4e
-	bl sub_02056084
-	ldmia sp!, {r3, r4, r5, pc}
-#endif
-_02300224:
-	cmp r0, #0xe
-	bne _02300248
-	mov r0, #3
-	bl GetExplorerMazeMonster
-	mov r1, r0
-#ifdef JAPAN
-	mov r0, r4
-	mov r2, #0x4e
-	bl sub_02056084
-	ldmia sp!, {r4, pc}
-_02300248:
-	ldrsh r1, [r1, #4]
-	mov r0, r4
-	mov r2, #0x4e
-	bl GetNameWithGender
-	ldmia sp!, {r4, pc}
-_0230025C:
-	ldrsh r0, [r1, #0xc]
-	bl GetActiveTeamMember
-	mov r1, r0
-	mov r0, r4
-	bl sub_020585B4
-	ldmia sp!, {r4, pc}
-	.align 2, 0
-_02301678: .word DUNGEON_PTR
-_02300274: .word 0x00000973
-_02300278: .word 0x00000971
-#else
-	mov r0, r5
-	mov r2, #0x4e
-	bl sub_02056084
-	ldmia sp!, {r3, r4, r5, pc}
-_02300248:
-	ldrsh r1, [r4, #4]
-	mov r0, r5
-	mov r2, #0x4e
-	bl GetNameWithGender
-	ldmia sp!, {r3, r4, r5, pc}
-_0230025C:
-	ldrsh r0, [r4, #0xc]
-	bl GetActiveTeamMember
-	mov r1, r0
-	mov r0, r5
-	bl sub_020585B4
-	ldmia sp!, {r3, r4, r5, pc}
-	.align 2, 0
-_02300274: .word 0x00000C34
-_02300278: .word 0x00000C32
-#endif
-	arm_func_end GetMonsterName
-
 	arm_func_start ov29_0230027C
 ov29_0230027C: ; 0x0230027C
 	stmdb sp!, {r4, lr}
diff --git a/include/common.h b/include/common.h
new file mode 100644
index 00000000..9b1fb887
--- /dev/null
+++ b/include/common.h
@@ -0,0 +1,88 @@
+#ifndef PMDSKY_COMMON_H
+#define PMDSKY_COMMON_H
+
+#include "item.h"
+#include "move.h"
+
+struct ground_move {
+    // 0x0: flags: 1-byte bitfield
+    // See move::flags0 for details
+    u8 f_exists : 1;
+    u8 f_subsequent_in_link_chain : 1;
+    u8 f_enabled_for_ai : 1;
+    u8 f_set : 1;
+    u8 f_last_used : 1; // unconfirmed, but probably the same as struct move
+    u8 f_disabled : 1;
+    u8 flags_unk6 : 2;
+
+    u8 field_0x1;  // Probably padding since it doesn't get initialized
+    u16 id; // 0x2
+    u8 ginseng;      // 0x4: Ginseng boost
+    u16 field_0x5;  // Probably padding since it doesn't get initialized
+};
+
+struct ground_monster {
+    u8 is_valid;            // 0x0: True if the entry is valid
+    s8 level;               // 0x1: Monster level
+    u8 joined_at;           // 0x2
+    u8 joined_at_floor;     // 0x3: See struct monster::joined_at_floor
+    u16 id;                 // 0x4: Monster ID
+    s8 level_at_first_evo;  // 0x6: Level upon first evolution, or 0 if not applicable
+    s8 level_at_second_evo; // 0x7: Level upon second evolution, or 0 if not applicable
+    u16 iq;                 // 0x8
+    u16 max_hp;             // 0xA
+    u8 offensive_stats[2];  // 0xC: {atk, sp_atk}
+    u8 defensive_stats[2];  // 0xE: {def, sp_def}
+    s32 exp;                // 0x10
+    // 0x14: Bitvector that keeps track of which IQ skills the monster has enabled.
+    // See enum iq_skill_id for the meaning of each bit.
+    u32 iq_skill_flags[3];
+    u8 tactic;     // 0x20
+    u8 field_0x21;
+    struct ground_move moves[4]; // 0x22
+    char name[10];               // 0x3A: Display name of the monster
+};
+
+// Stores information about active team members, including those from special episodes.
+// A lot of the fields seem to be analogous to fields on struct monster.
+struct team_member {
+    // 0x0: flags: 1-byte bitfield
+    u8 f_is_valid : 1;
+    u8 flags_unk1 : 7;
+
+    u8 is_leader;                // 0x1
+    u8 level;                 // 0x2
+    u8 joined_at; // 0x3
+    u8 joined_at_floor;       // 0x4
+    u8 field_0x5;
+    u16 iq;          // 0x6
+    s16 member_index; // 0x8: Index in the list of all team members (not just the active ones)
+    s16 team_index;   // 0xA: In order by team lineup
+    u16 id;    // 0xC
+    u16 current_hp;        // 0xE
+    u16 max_hp;            // 0x10
+    u8 offensive_stats[2]; // 0x12: {atk, sp_atk}
+    u8 defensive_stats[2]; // 0x14: {def, sp_def}
+    u8 field_0x16;
+    u8 field_0x17;
+    s32 exp;              // 0x18
+    struct move moves[4]; // 0x1C
+    u8 field_0x3C;
+    u8 field_0x3D;
+    struct item held_item;         // 0x3E
+    s16 belly;                 // 0x44: Integer part
+    s16 belly_thousandths;     // 0x46
+    s16 max_belly;             // 0x48: Integer part
+    s16 max_belly_thousandths; // 0x4A
+    // 0x4C: Bitvector that keeps track of which IQ skills the monster has enabled.
+    // See enum iq_skill_id for the meaning of each bit.
+    u32 iq_skill_flags[3];
+    u8 tactic; // 0x58
+    u8 field_0x59;
+    s16 hidden_power_base_power;    // 0x5A
+    u8 hidden_power_type; // 0x5C
+    u8 field_0x5D;               // Gets copied to monster->field_0x47.
+    char name[10];                      // 0x5E: Display name of the monster
+};
+
+#endif
diff --git a/include/overlay_29_023000E4.h b/include/overlay_29_023000E4.h
index 75e3e38c..af9b55b2 100644
--- a/include/overlay_29_023000E4.h
+++ b/include/overlay_29_023000E4.h
@@ -2,8 +2,21 @@
 #define PMDSKY_OVERLAY_29_023000E4_H
 
 #include "dungeon_mode.h"
+#include "dungeon.h"
+#include "common.h"
+#include "main_0202593C.h"
 
 // Checks if an entity pointer points to a valid entity (not entity type 0, which represents no entity).
 bool8 EntityIsValid__023000E4(struct entity *entity);
+#ifndef JAPAN
+// Used when determining how a monster's name should be displayed.
+enum display_name_type {
+    DISPLAY_NAME_NORMAL = 0,  // Display the name as usual
+    DISPLAY_NAME_UNKNOWN = 1, // Display "(?)"
+    DISPLAY_NAME_DECOY = 2,   // Display "Decoy"
+};
+enum display_name_type GetMonsterDisplayNameType(struct monster *monster);
+#endif
+void GetMonsterName(char *buffer, struct monster *target_info);
 
 #endif //PMDSKY_OVERLAY_29_023000E4_H
diff --git a/main.lsf b/main.lsf
index 80f8ab6f..b372da7a 100644
--- a/main.lsf
+++ b/main.lsf
@@ -352,7 +352,7 @@ Overlay OVY_29
 	Object src/overlay_29_022FFF28.o
 	Object asm/overlay_29_022FFF4C.o
 	Object src/overlay_29_023000E4.o
-	Object asm/overlay_29_02300108.o
+	Object asm/overlay_29_0230027C.o
 	Object src/dungeon_logic.o
 	Object src/dungeon_logic_1.o
 	Object asm/overlay_29_023007A8.o
diff --git a/src/overlay_29_023000E4.c b/src/overlay_29_023000E4.c
index 4eda217d..b68b36c1 100644
--- a/src/overlay_29_023000E4.c
+++ b/src/overlay_29_023000E4.c
@@ -7,3 +7,47 @@ bool8 EntityIsValid__023000E4(struct entity *entity)
 
     return entity->type != ENTITY_NOTHING;
 }
+
+extern struct dungeon *DUNGEON_PTR[];
+#ifndef JAPAN
+enum display_name_type GetMonsterDisplayNameType(struct monster *monster) {
+    struct dungeon *dungeon = DUNGEON_PTR[0];
+    if ( dungeon->display_data.blinded || dungeon->display_data.hallucinating || (!dungeon->display_data.can_see_traps && (monster->invisible_class_status.status == 1))) {
+        if (monster->is_not_team_member) return DISPLAY_NAME_UNKNOWN;
+    }
+    if (monster->curse_class_status.curse == STATUS_CURSE_DECOY) return DISPLAY_NAME_DECOY;
+    return DISPLAY_NAME_NORMAL;
+}
+#endif
+
+extern void GetNameWithGender(char *dst, s16 monster_id, char color_id);
+extern struct ground_monster *GetExplorerMazeMonster(u8 entry_number);
+extern void sub_02056084(char *dst, struct ground_monster *ground_monster, u8 unk);
+extern void sub_020585B4(char *dst, struct team_member *team_member);
+extern struct team_member *GetActiveTeamMember(int roster_idx);
+
+void GetMonsterName(char *buffer, struct monster *target_info) {
+#ifndef JAPAN
+    int display_name_type = GetMonsterDisplayNameType(target_info);
+    if (display_name_type == DISPLAY_NAME_UNKNOWN) CopyStringFromId(buffer, 3124);
+    else if (display_name_type == DISPLAY_NAME_DECOY) CopyStringFromId(buffer, 3122);
+#else
+    struct dungeon *dungeon = DUNGEON_PTR[0];
+    if ( dungeon->display_data.blinded || dungeon->display_data.hallucinating || (!dungeon->display_data.can_see_traps && (target_info->invisible_class_status.status == 1))) {
+        if (target_info->is_not_team_member) {
+            CopyStringFromId(buffer, 2419);
+            return;
+        }
+    }
+    if (target_info->curse_class_status.curse == STATUS_CURSE_DECOY) CopyStringFromId(buffer, 2417);
+#endif
+    else if (target_info->is_not_team_member) {
+        enum monster_behavior behavior = target_info->monster_behavior;
+        if (behavior == BEHAVIOR_EXPLORER_MAZE_1) sub_02056084(buffer, GetExplorerMazeMonster(0), 0x4e);
+        else if (behavior == BEHAVIOR_EXPLORER_MAZE_2) sub_02056084(buffer, GetExplorerMazeMonster(1), 0x4e);
+        else if (behavior == BEHAVIOR_EXPLORER_MAZE_3) sub_02056084(buffer, GetExplorerMazeMonster(2), 0x4e);
+        else if (behavior == BEHAVIOR_EXPLORER_MAZE_4) sub_02056084(buffer, GetExplorerMazeMonster(3), 0x4e);
+        else GetNameWithGender(buffer, target_info->apparent_id, 'N');
+    }
+    else sub_020585B4(buffer, GetActiveTeamMember(target_info->team_index));
+}