diff --git a/asm/include/overlay_29_02311C28.inc b/asm/include/overlay_29_02311C28.inc
index 21fa9403..8aa65120 100644
--- a/asm/include/overlay_29_02311C28.inc
+++ b/asm/include/overlay_29_02311C28.inc
@@ -4,20 +4,29 @@
 .public CalcStatusDuration
 .public ChangeShayminForme
 .public CopyStringFromId
-.public DefenderAbilityIsActive__02311B94
 .public DIRECTIONS_XY
 .public DUNGEON_PTR
+.public DefenderAbilityIsActive__02311B94
 .public EntityIsValid__023118B4
 .public ExclusiveItemEffectIsActiveWithLogging
 .public GetMessageLogPreprocessorArgs
 .public GetTile
 .public GetTileAtEntity
+.public GetTreatmentBetweenMonstersIgnoreStatus
 .public IsProtectedFromNegativeStatus
 .public IsProtectedFromSleepClassStatus
 .public IsProtectedFromStatDrops
 .public ItemIsActive__02311BF8
 .public LogMessageByIdWithPopupCheckUserTarget
 .public MonsterIsType
+.public SECONDARY_TERRAIN_TYPES
+.public SafeguardIsActive
+.public SetMessageLogPreprocessorArgsString
+.public SetPreprocessorArgsIdVal
+.public SetPreprocessorArgsStringToName
+.public SubstitutePlaceholderStringTags
+.public TryActivateQuickFeet
+.public UpdateStatusIconFlags
 .public ov10_022C4728
 .public ov10_022C479C
 .public ov10_022C47A0
@@ -45,18 +54,6 @@
 .public ov29_022E4C4C
 .public ov29_022E4D24
 .public ov29_022E4D28
-.public ov29_022E4DCC
-.public ov29_022E4E74
-.public ov29_022E4F1C
 .public ov29_022E53EC
-.public GetTreatmentBetweenMonstersIgnoreStatus
 .public ov29_02304A48
 .public ov29_02304A84
-.public SafeguardIsActive
-.public SECONDARY_TERRAIN_TYPES
-.public SetMessageLogPreprocessorArgsString
-.public SetPreprocessorArgsIdVal
-.public SetPreprocessorArgsStringToName
-.public SubstitutePlaceholderStringTags
-.public TryActivateQuickFeet
-.public UpdateStatusIconFlags
diff --git a/asm/include/overlay_29_0231399C.inc b/asm/include/overlay_29_0231399C.inc
new file mode 100644
index 00000000..716d03fe
--- /dev/null
+++ b/asm/include/overlay_29_0231399C.inc
@@ -0,0 +1,11 @@
+#pragma once
+.public AbilityIsActiveVeneer
+.public AllocateTemp1024ByteBufferFromPool
+.public CopyStringFromId
+.public EntityIsValid__023118B4
+.public LogMessageByIdWithPopupCheckUserTarget
+.public SetMessageLogPreprocessorArgsString
+.public SubstitutePlaceholderStringTags
+.public UpdateStatusIconFlags
+.public ov29_022E4E74
+.public ov29_022E4F1C
diff --git a/asm/overlay_29_02311C28.s b/asm/overlay_29_02311C28.s
index 0bdcb544..af5ef563 100644
--- a/asm/overlay_29_02311C28.s
+++ b/asm/overlay_29_02311C28.s
@@ -2135,336 +2135,3 @@ _02313808: .word 0x00000DCC + LOWER_OFFENSIVE_STAT_OFFSET
 _0231380C: .word 0x00000D91 + LOWER_OFFENSIVE_STAT_OFFSET
 _02313810: .word 0x00000DD9 + LOWER_OFFENSIVE_STAT_OFFSET
 	arm_func_end LowerOffensiveStat
-
-	arm_func_start LowerDefensiveStat
-LowerDefensiveStat: ; 0x02313814
-#ifdef JAPAN
-#define LOWER_DEFENSIVE_STAT_OFFSET -0x2C0
-#else
-#define LOWER_DEFENSIVE_STAT_OFFSET 0
-#endif
-	stmdb sp!, {r0, r1, r2, r3}
-	stmdb sp!, {r4, r5, r6, r7, r8, lr}
-	mov r7, r1
-	mov r5, r3
-	mov r8, r0
-	bl AllocateTemp1024ByteBufferFromPool
-	mov r6, r0
-	bl AllocateTemp1024ByteBufferFromPool
-	mov r4, r0
-	mov r1, r5, lsl #0x10
-	mov r0, r7
-	mov r5, r1, asr #0x10
-	bl EntityIsValid__023118B4
-	cmp r0, #0
-	beq _0231397C
-	ldr r0, [sp, #0x20]
-	cmp r0, #0
-	beq _02313878
-	ldr r1, _02313988 ; =0x00000DC9
-	mov r0, r6
-	bl CopyStringFromId
-	mov r1, r6
-	mov r0, #1
-	bl SetMessageLogPreprocessorArgsString
-	b _02313890
-_02313878:
-	ldr r1, _0231398C ; =0x00000DC8
-	mov r0, r6
-	bl CopyStringFromId
-	mov r1, r6
-	mov r0, #1
-	bl SetMessageLogPreprocessorArgsString
-_02313890:
-	ldrb r0, [sp, #0x28]
-	cmp r0, #0
-	beq _023138B4
-	ldrb r2, [sp, #0x2c]
-	mov r0, r8
-	mov r1, r7
-	bl IsProtectedFromStatDrops
-	cmp r0, #0
-	bne _0231397C
-_023138B4:
-	mov r0, #0
-	mov r1, r7
-	mov r2, r0
-	ldr r6, [r7, #0xb4]
-	bl SubstitutePlaceholderStringTags
-	add r1, sp, #0x20
-	ldr r1, [r1]
-	mov r0, r7
-	bl ov29_022E4DCC
-	mov r0, r7
-	mov r1, #0x61
-	bl AbilityIsActiveVeneer
-	cmp r0, #0
-	movne r0, r5, lsl #0x11
-	movne r5, r0, asr #0x10
-	cmp r5, #1
-	bne _02313914
-	ldr r1, _02313990 ; =0x00000DCD
-	mov r0, r4
-	bl CopyStringFromId
-	mov r1, r4
-	mov r0, #2
-	bl SetMessageLogPreprocessorArgsString
-	b _0231392C
-_02313914:
-	ldr r1, _02313994 ; =0x00000DCC
-	mov r0, r4
-	bl CopyStringFromId
-	mov r1, r4
-	mov r0, #2
-	bl SetMessageLogPreprocessorArgsString
-_0231392C:
-	ldr r1, [sp, #0x20]
-	add r0, r6, r1, lsl #1
-	ldrsh r0, [r0, #0x28]
-	subs r4, r0, r5
-	movmi r4, #0
-	cmp r4, r0
-	beq _02313964
-	add r3, r6, r1, lsl #1
-	mov r0, r8
-	mov r1, r7
-	mov r2, #0xd90 + LOWER_DEFENSIVE_STAT_OFFSET
-	strh r4, [r3, #0x28]
-	bl LogMessageByIdWithPopupCheckUserTarget
-	b _02313974
-_02313964:
-	ldr r2, _02313998 ; =0x00000DD7
-	mov r0, r8
-	mov r1, r7
-	bl LogMessageByIdWithPopupCheckUserTarget
-_02313974:
-	mov r0, r7
-	bl UpdateStatusIconFlags
-_0231397C:
-	ldmia sp!, {r4, r5, r6, r7, r8, lr}
-	add sp, sp, #0x10
-	bx lr
-	.align 2, 0
-_02313988: .word 0x00000DC9 + LOWER_DEFENSIVE_STAT_OFFSET
-_0231398C: .word 0x00000DC8 + LOWER_DEFENSIVE_STAT_OFFSET
-_02313990: .word 0x00000DCD + LOWER_DEFENSIVE_STAT_OFFSET
-_02313994: .word 0x00000DCC + LOWER_DEFENSIVE_STAT_OFFSET
-_02313998: .word 0x00000DD7 + LOWER_DEFENSIVE_STAT_OFFSET
-	arm_func_end LowerDefensiveStat
-
-	arm_func_start BoostOffensiveStat
-BoostOffensiveStat: ; 0x0231399C
-	stmdb sp!, {r0, r1, r2, r3}
-	stmdb sp!, {r3, r4, r5, r6, r7, r8, sb, lr}
-	mov r8, r1
-	mov r6, r3
-	mov sb, r0
-	bl AllocateTemp1024ByteBufferFromPool
-	mov r4, r0
-	bl AllocateTemp1024ByteBufferFromPool
-	mov r5, r0
-	mov r1, r6, lsl #0x10
-	mov r0, r8
-	mov r6, r1, asr #0x10
-	bl EntityIsValid__023118B4
-	cmp r0, #0
-	beq _02313AE4
-	mov r0, #0
-	mov r1, r8
-	mov r2, r0
-	ldr r7, [r8, #0xb4]
-	bl SubstitutePlaceholderStringTags
-	add r1, sp, #0x28
-	ldr r1, [r1]
-	mov r0, r8
-	bl ov29_022E4E74
-	ldr r0, [sp, #0x28]
-	cmp r0, #0
-	beq _02313A24
-	ldr r1, _02313AF0 ; =0x00000DCB
-	mov r0, r4
-	bl CopyStringFromId
-	mov r1, r4
-	mov r0, #1
-	bl SetMessageLogPreprocessorArgsString
-	b _02313A3C
-_02313A24:
-	ldr r1, _02313AF4 ; =0x00000DCA
-	mov r0, r4
-	bl CopyStringFromId
-	mov r1, r4
-	mov r0, #1
-	bl SetMessageLogPreprocessorArgsString
-_02313A3C:
-	mov r0, r8
-	mov r1, #0x61
-	bl AbilityIsActiveVeneer
-	cmp r0, #0
-	movne r0, r6, lsl #0x11
-	movne r6, r0, asr #0x10
-	cmp r6, #1
-	bne _02313A78
-	ldr r1, _02313AF8 ; =0x00000DCD
-	mov r0, r5
-	bl CopyStringFromId
-	mov r1, r5
-	mov r0, #2
-	bl SetMessageLogPreprocessorArgsString
-	b _02313A90
-_02313A78:
-	ldr r1, _02313AFC ; =0x00000DCC
-	mov r0, r5
-	bl CopyStringFromId
-	mov r1, r5
-	mov r0, #2
-	bl SetMessageLogPreprocessorArgsString
-_02313A90:
-	ldr r1, [sp, #0x28]
-	add r0, r7, r1, lsl #1
-	ldrsh r0, [r0, #0x24]
-	add r4, r0, r6
-	cmp r4, #0x14
-	movge r4, #0x14
-	cmp r4, r0
-	beq _02313ACC
-	ldr r2, _02313B00 ; =0x00000D8F
-	add r3, r7, r1, lsl #1
-	mov r0, sb
-	mov r1, r8
-	strh r4, [r3, #0x24]
-	bl LogMessageByIdWithPopupCheckUserTarget
-	b _02313ADC
-_02313ACC:
-	ldr r2, _02313B04 ; =0x00000DD8
-	mov r0, sb
-	mov r1, r8
-	bl LogMessageByIdWithPopupCheckUserTarget
-_02313ADC:
-	mov r0, r8
-	bl UpdateStatusIconFlags
-_02313AE4:
-	ldmia sp!, {r3, r4, r5, r6, r7, r8, sb, lr}
-	add sp, sp, #0x10
-	bx lr
-	.align 2, 0
-#ifdef JAPAN
-#define BOOST_OFFENSIVE_STAT_OFFSET -0x2C0
-#else
-#define BOOST_OFFENSIVE_STAT_OFFSET 0
-#endif
-_02313AF0: .word 0x00000DCB + BOOST_OFFENSIVE_STAT_OFFSET
-_02313AF4: .word 0x00000DCA + BOOST_OFFENSIVE_STAT_OFFSET
-_02313AF8: .word 0x00000DCD + BOOST_OFFENSIVE_STAT_OFFSET
-_02313AFC: .word 0x00000DCC + BOOST_OFFENSIVE_STAT_OFFSET
-_02313B00: .word 0x00000D8F + BOOST_OFFENSIVE_STAT_OFFSET
-_02313B04: .word 0x00000DD8 + BOOST_OFFENSIVE_STAT_OFFSET
-	arm_func_end BoostOffensiveStat
-
-; https://decomp.me/scratch/90P8f
-	arm_func_start BoostDefensiveStat
-BoostDefensiveStat: ; 0x02313B08
-	stmdb sp!, {r0, r1, r2, r3}
-	stmdb sp!, {r3, r4, r5, r6, r7, r8, sb, lr}
-	mov r8, r1
-	mov r6, r3
-	mov sb, r0
-	bl AllocateTemp1024ByteBufferFromPool
-	mov r4, r0
-	bl AllocateTemp1024ByteBufferFromPool
-	mov r5, r0
-	mov r1, r6, lsl #0x10
-	mov r0, r8
-	mov r6, r1, asr #0x10
-	bl EntityIsValid__023118B4
-	cmp r0, #0
-	beq _02313C50
-	mov r0, #0
-	mov r1, r8
-	mov r2, r0
-	ldr r7, [r8, #0xb4]
-	bl SubstitutePlaceholderStringTags
-	add r1, sp, #0x28
-	ldr r1, [r1]
-	mov r0, r8
-	bl ov29_022E4F1C
-	ldr r0, [sp, #0x28]
-	cmp r0, #0
-	beq _02313B90
-	ldr r1, _02313C5C ; =0x00000DC9
-	mov r0, r4
-	bl CopyStringFromId
-	mov r1, r4
-	mov r0, #1
-	bl SetMessageLogPreprocessorArgsString
-	b _02313BA8
-_02313B90:
-	ldr r1, _02313C60 ; =0x00000DC8
-	mov r0, r4
-	bl CopyStringFromId
-	mov r1, r4
-	mov r0, #1
-	bl SetMessageLogPreprocessorArgsString
-_02313BA8:
-	mov r0, r8
-	mov r1, #0x61
-	bl AbilityIsActiveVeneer
-	cmp r0, #0
-	movne r0, r6, lsl #0x11
-	movne r6, r0, asr #0x10
-	cmp r6, #1
-	bne _02313BE4
-	ldr r1, _02313C64 ; =0x00000DCD
-	mov r0, r5
-	bl CopyStringFromId
-	mov r1, r5
-	mov r0, #2
-	bl SetMessageLogPreprocessorArgsString
-	b _02313BFC
-_02313BE4:
-	ldr r1, _02313C68 ; =0x00000DCC
-	mov r0, r5
-	bl CopyStringFromId
-	mov r1, r5
-	mov r0, #2
-	bl SetMessageLogPreprocessorArgsString
-_02313BFC:
-	ldr r1, [sp, #0x28]
-	add r0, r7, r1, lsl #1
-	ldrsh r0, [r0, #0x28]
-	add r4, r0, r6
-	cmp r4, #0x14
-	movge r4, #0x14
-	cmp r4, r0
-	beq _02313C38
-	ldr r2, _02313C6C ; =0x00000D8E
-	add r3, r7, r1, lsl #1
-	mov r0, sb
-	mov r1, r8
-	strh r4, [r3, #0x28]
-	bl LogMessageByIdWithPopupCheckUserTarget
-	b _02313C48
-_02313C38:
-	ldr r2, _02313C70 ; =0x00000DD6
-	mov r0, sb
-	mov r1, r8
-	bl LogMessageByIdWithPopupCheckUserTarget
-_02313C48:
-	mov r0, r8
-	bl UpdateStatusIconFlags
-_02313C50:
-	ldmia sp!, {r3, r4, r5, r6, r7, r8, sb, lr}
-	add sp, sp, #0x10
-	bx lr
-	.align 2, 0
-#ifdef JAPAN
-#define BOOST_DEFENSIVE_STAT_OFFSET -0x2C0
-#else
-#define BOOST_DEFENSIVE_STAT_OFFSET 0
-#endif
-_02313C5C: .word 0x00000DC9 + BOOST_DEFENSIVE_STAT_OFFSET
-_02313C60: .word 0x00000DC8 + BOOST_DEFENSIVE_STAT_OFFSET
-_02313C64: .word 0x00000DCD + BOOST_DEFENSIVE_STAT_OFFSET
-_02313C68: .word 0x00000DCC + BOOST_DEFENSIVE_STAT_OFFSET
-_02313C6C: .word 0x00000D8E + BOOST_DEFENSIVE_STAT_OFFSET
-_02313C70: .word 0x00000DD6 + BOOST_DEFENSIVE_STAT_OFFSET
-	arm_func_end BoostDefensiveStat
diff --git a/asm/overlay_29_0231399C.s b/asm/overlay_29_0231399C.s
new file mode 100644
index 00000000..292ce09b
--- /dev/null
+++ b/asm/overlay_29_0231399C.s
@@ -0,0 +1,221 @@
+	.include "asm/macros.inc"
+	.include "overlay_29_0231399C.inc"
+
+	.text
+
+	arm_func_start BoostOffensiveStat
+BoostOffensiveStat: ; 0x0231399C
+	stmdb sp!, {r0, r1, r2, r3}
+	stmdb sp!, {r3, r4, r5, r6, r7, r8, sb, lr}
+	mov r8, r1
+	mov r6, r3
+	mov sb, r0
+	bl AllocateTemp1024ByteBufferFromPool
+	mov r4, r0
+	bl AllocateTemp1024ByteBufferFromPool
+	mov r5, r0
+	mov r1, r6, lsl #0x10
+	mov r0, r8
+	mov r6, r1, asr #0x10
+	bl EntityIsValid__023118B4
+	cmp r0, #0
+	beq _02313AE4
+	mov r0, #0
+	mov r1, r8
+	mov r2, r0
+	ldr r7, [r8, #0xb4]
+	bl SubstitutePlaceholderStringTags
+	add r1, sp, #0x28
+	ldr r1, [r1]
+	mov r0, r8
+	bl ov29_022E4E74
+	ldr r0, [sp, #0x28]
+	cmp r0, #0
+	beq _02313A24
+	ldr r1, _02313AF0 ; =0x00000DCB
+	mov r0, r4
+	bl CopyStringFromId
+	mov r1, r4
+	mov r0, #1
+	bl SetMessageLogPreprocessorArgsString
+	b _02313A3C
+_02313A24:
+	ldr r1, _02313AF4 ; =0x00000DCA
+	mov r0, r4
+	bl CopyStringFromId
+	mov r1, r4
+	mov r0, #1
+	bl SetMessageLogPreprocessorArgsString
+_02313A3C:
+	mov r0, r8
+	mov r1, #0x61
+	bl AbilityIsActiveVeneer
+	cmp r0, #0
+	movne r0, r6, lsl #0x11
+	movne r6, r0, asr #0x10
+	cmp r6, #1
+	bne _02313A78
+	ldr r1, _02313AF8 ; =0x00000DCD
+	mov r0, r5
+	bl CopyStringFromId
+	mov r1, r5
+	mov r0, #2
+	bl SetMessageLogPreprocessorArgsString
+	b _02313A90
+_02313A78:
+	ldr r1, _02313AFC ; =0x00000DCC
+	mov r0, r5
+	bl CopyStringFromId
+	mov r1, r5
+	mov r0, #2
+	bl SetMessageLogPreprocessorArgsString
+_02313A90:
+	ldr r1, [sp, #0x28]
+	add r0, r7, r1, lsl #1
+	ldrsh r0, [r0, #0x24]
+	add r4, r0, r6
+	cmp r4, #0x14
+	movge r4, #0x14
+	cmp r4, r0
+	beq _02313ACC
+	ldr r2, _02313B00 ; =0x00000D8F
+	add r3, r7, r1, lsl #1
+	mov r0, sb
+	mov r1, r8
+	strh r4, [r3, #0x24]
+	bl LogMessageByIdWithPopupCheckUserTarget
+	b _02313ADC
+_02313ACC:
+	ldr r2, _02313B04 ; =0x00000DD8
+	mov r0, sb
+	mov r1, r8
+	bl LogMessageByIdWithPopupCheckUserTarget
+_02313ADC:
+	mov r0, r8
+	bl UpdateStatusIconFlags
+_02313AE4:
+	ldmia sp!, {r3, r4, r5, r6, r7, r8, sb, lr}
+	add sp, sp, #0x10
+	bx lr
+	.align 2, 0
+#ifdef JAPAN
+#define BOOST_OFFENSIVE_STAT_OFFSET -0x2C0
+#else
+#define BOOST_OFFENSIVE_STAT_OFFSET 0
+#endif
+_02313AF0: .word 0x00000DCB + BOOST_OFFENSIVE_STAT_OFFSET
+_02313AF4: .word 0x00000DCA + BOOST_OFFENSIVE_STAT_OFFSET
+_02313AF8: .word 0x00000DCD + BOOST_OFFENSIVE_STAT_OFFSET
+_02313AFC: .word 0x00000DCC + BOOST_OFFENSIVE_STAT_OFFSET
+_02313B00: .word 0x00000D8F + BOOST_OFFENSIVE_STAT_OFFSET
+_02313B04: .word 0x00000DD8 + BOOST_OFFENSIVE_STAT_OFFSET
+	arm_func_end BoostOffensiveStat
+
+; https://decomp.me/scratch/90P8f
+	arm_func_start BoostDefensiveStat
+BoostDefensiveStat: ; 0x02313B08
+	stmdb sp!, {r0, r1, r2, r3}
+	stmdb sp!, {r3, r4, r5, r6, r7, r8, sb, lr}
+	mov r8, r1
+	mov r6, r3
+	mov sb, r0
+	bl AllocateTemp1024ByteBufferFromPool
+	mov r4, r0
+	bl AllocateTemp1024ByteBufferFromPool
+	mov r5, r0
+	mov r1, r6, lsl #0x10
+	mov r0, r8
+	mov r6, r1, asr #0x10
+	bl EntityIsValid__023118B4
+	cmp r0, #0
+	beq _02313C50
+	mov r0, #0
+	mov r1, r8
+	mov r2, r0
+	ldr r7, [r8, #0xb4]
+	bl SubstitutePlaceholderStringTags
+	add r1, sp, #0x28
+	ldr r1, [r1]
+	mov r0, r8
+	bl ov29_022E4F1C
+	ldr r0, [sp, #0x28]
+	cmp r0, #0
+	beq _02313B90
+	ldr r1, _02313C5C ; =0x00000DC9
+	mov r0, r4
+	bl CopyStringFromId
+	mov r1, r4
+	mov r0, #1
+	bl SetMessageLogPreprocessorArgsString
+	b _02313BA8
+_02313B90:
+	ldr r1, _02313C60 ; =0x00000DC8
+	mov r0, r4
+	bl CopyStringFromId
+	mov r1, r4
+	mov r0, #1
+	bl SetMessageLogPreprocessorArgsString
+_02313BA8:
+	mov r0, r8
+	mov r1, #0x61
+	bl AbilityIsActiveVeneer
+	cmp r0, #0
+	movne r0, r6, lsl #0x11
+	movne r6, r0, asr #0x10
+	cmp r6, #1
+	bne _02313BE4
+	ldr r1, _02313C64 ; =0x00000DCD
+	mov r0, r5
+	bl CopyStringFromId
+	mov r1, r5
+	mov r0, #2
+	bl SetMessageLogPreprocessorArgsString
+	b _02313BFC
+_02313BE4:
+	ldr r1, _02313C68 ; =0x00000DCC
+	mov r0, r5
+	bl CopyStringFromId
+	mov r1, r5
+	mov r0, #2
+	bl SetMessageLogPreprocessorArgsString
+_02313BFC:
+	ldr r1, [sp, #0x28]
+	add r0, r7, r1, lsl #1
+	ldrsh r0, [r0, #0x28]
+	add r4, r0, r6
+	cmp r4, #0x14
+	movge r4, #0x14
+	cmp r4, r0
+	beq _02313C38
+	ldr r2, _02313C6C ; =0x00000D8E
+	add r3, r7, r1, lsl #1
+	mov r0, sb
+	mov r1, r8
+	strh r4, [r3, #0x28]
+	bl LogMessageByIdWithPopupCheckUserTarget
+	b _02313C48
+_02313C38:
+	ldr r2, _02313C70 ; =0x00000DD6
+	mov r0, sb
+	mov r1, r8
+	bl LogMessageByIdWithPopupCheckUserTarget
+_02313C48:
+	mov r0, r8
+	bl UpdateStatusIconFlags
+_02313C50:
+	ldmia sp!, {r3, r4, r5, r6, r7, r8, sb, lr}
+	add sp, sp, #0x10
+	bx lr
+	.align 2, 0
+#ifdef JAPAN
+#define BOOST_DEFENSIVE_STAT_OFFSET -0x2C0
+#else
+#define BOOST_DEFENSIVE_STAT_OFFSET 0
+#endif
+_02313C5C: .word 0x00000DC9 + BOOST_DEFENSIVE_STAT_OFFSET
+_02313C60: .word 0x00000DC8 + BOOST_DEFENSIVE_STAT_OFFSET
+_02313C64: .word 0x00000DCD + BOOST_DEFENSIVE_STAT_OFFSET
+_02313C68: .word 0x00000DCC + BOOST_DEFENSIVE_STAT_OFFSET
+_02313C6C: .word 0x00000D8E + BOOST_DEFENSIVE_STAT_OFFSET
+_02313C70: .word 0x00000DD6 + BOOST_DEFENSIVE_STAT_OFFSET
+	arm_func_end BoostDefensiveStat
diff --git a/include/overlay_29_02313814.h b/include/overlay_29_02313814.h
new file mode 100644
index 00000000..93169f35
--- /dev/null
+++ b/include/overlay_29_02313814.h
@@ -0,0 +1,11 @@
+#ifndef PMDSKY_OVERLAY_29_02313814_H
+#define PMDSKY_OVERLAY_29_02313814_H
+
+struct StatIndex
+{
+    int id;
+};
+
+void LowerDefensiveStat(struct entity *pokemon, struct entity *target, struct StatIndex stat, s32 increment, bool8 checkProtected, bool8 logMsgProtected);
+
+#endif //PMDSKY_OVERLAY_29_02313814_H
diff --git a/main.lsf b/main.lsf
index a2bda8ec..f02889f0 100644
--- a/main.lsf
+++ b/main.lsf
@@ -541,6 +541,8 @@ Overlay OVY_29
 	Object asm/overlay_29_023118D8.o
 	Object src/overlay_29_02311BF8.o
 	Object asm/overlay_29_02311C28.o
+	Object src/overlay_29_02313814.o
+	Object asm/overlay_29_0231399C.o
 	Object src/move_orb_effects.o
 	Object asm/overlay_29_02313CE4.o
 	Object src/overlay_29_023147EC.o
diff --git a/src/overlay_29_02313814.c b/src/overlay_29_02313814.c
new file mode 100644
index 00000000..518f738a
--- /dev/null
+++ b/src/overlay_29_02313814.c
@@ -0,0 +1,76 @@
+#include "dungeon_pokemon_attributes.h"
+#include "dungeon_util_static.h"
+#include "overlay_29_023118B4.h"
+#include "overlay_29_02313814.h"
+
+extern u8* AllocateTemp1024ByteBufferFromPool(void);
+extern void CopyStringFromId(u8* buf, u32 string_id);
+extern void SetMessageLogPreprocessorArgsString(u32 a, u8 *buf);
+extern bool8 IsProtectedFromStatDrops(struct entity *user, struct entity *target, bool8 logMsg);
+extern void SubstitutePlaceholderStringTags(int a, struct entity *entity, u32 param_3);
+extern void ov29_022E4DCC(struct entity *pokemon, struct StatIndex);
+extern void LogMessageByIdWithPopupCheckUserTarget(struct entity *user, struct entity *target, u32 message_id);
+extern void UpdateStatusIconFlags(struct entity *);
+
+#ifdef JAPAN
+#define LOWER_DEFENSIVE_STAT_OFFSET -0x2C0
+#else
+#define LOWER_DEFENSIVE_STAT_OFFSET 0
+#endif // JAPAN
+
+void LowerDefensiveStat(struct entity *pokemon, struct entity *target, struct StatIndex stat, s32 nStagesRaw, bool8 checkProtected, bool8 logMsgProtected)
+{
+    struct monster *entityInfo;
+    u8 *buffer1 = AllocateTemp1024ByteBufferFromPool();
+    u8 *buffer2 = AllocateTemp1024ByteBufferFromPool();
+    s16 nStages = nStagesRaw;
+    s32 newStage;
+
+    if (!EntityIsValid__023118B4(target))
+        return;
+
+    if (stat.id != 0) {
+        CopyStringFromId(buffer1, 0xdc9 + LOWER_DEFENSIVE_STAT_OFFSET);
+        SetMessageLogPreprocessorArgsString(1, buffer1);
+    }
+    else {
+        CopyStringFromId(buffer1, 0xdc8 + LOWER_DEFENSIVE_STAT_OFFSET);
+        SetMessageLogPreprocessorArgsString(1, buffer1);
+    }
+
+    if (checkProtected) {
+        if (IsProtectedFromStatDrops(pokemon, target, logMsgProtected))
+            return;
+    }
+
+    entityInfo = GetEntInfo(target);
+    SubstitutePlaceholderStringTags(0,target,0);
+    ov29_022E4DCC(target,stat);
+
+    if (AbilityIsActiveVeneer(target, ABILITY_SIMPLE))
+        nStages *= 2;
+
+    if (nStages == 1) {
+        CopyStringFromId(buffer2, 0xdcd + LOWER_DEFENSIVE_STAT_OFFSET);
+        SetMessageLogPreprocessorArgsString(2, buffer2);
+    }
+    else {
+        CopyStringFromId(buffer2, 0xdcc + LOWER_DEFENSIVE_STAT_OFFSET);
+        SetMessageLogPreprocessorArgsString(2, buffer2);
+    }
+
+    newStage = entityInfo->stat_modifiers.defensive_stages[stat.id];
+    newStage -= nStages;
+    if (newStage < 0) {
+        newStage = 0;
+    }
+
+    if (entityInfo->stat_modifiers.defensive_stages[stat.id] != newStage) {
+        entityInfo->stat_modifiers.defensive_stages[stat.id] = newStage;
+        LogMessageByIdWithPopupCheckUserTarget(pokemon,target,0xd90 + LOWER_DEFENSIVE_STAT_OFFSET);
+    }
+    else {
+        LogMessageByIdWithPopupCheckUserTarget(pokemon,target,0xdd7 + LOWER_DEFENSIVE_STAT_OFFSET);
+    }
+    UpdateStatusIconFlags(target);
+}