Merge pull request #413 from Touched/decompile/field_ground_effect.s

Decompile field_ground_effect.s

6 files changed, 579 insertions, 1397 deletions

diff --git a/asm/field_ground_effect.s b/asm/field_ground_effect.s
deleted file mode 100644
index 47c4b4c60..000000000
--- a/asm/field_ground_effect.s
+++ /dev/null
@@ -1,1302 +0,0 @@
-	.include "constants/gba_constants.inc"
-	.include "constants/species_constants.inc"
-	.include "asm/macros.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start FieldObjectCheckForReflectiveSurface
-FieldObjectCheckForReflectiveSurface: @ 8063A44
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x8
-	adds r5, r0, 0
-	ldrb r0, [r5, 0x5]
-	bl GetFieldObjectGraphicsInfo
-	movs r2, 0x8
-	ldrsh r1, [r0, r2]
-	adds r1, 0x8
-	lsls r1, 12
-	lsrs r1, 16
-	str r1, [sp]
-	movs r1, 0xA
-	ldrsh r0, [r0, r1]
-	adds r0, 0x8
-	lsls r0, 12
-	movs r4, 0
-	lsrs r2, r0, 16
-	str r2, [sp, 0x4]
-	asrs r0, 16
-	cmp r4, r0
-	blt _08063A7A
-	b _08063B80
-_08063A7A:
-	movs r0, 0x1
-	mov r10, r0
-_08063A7E:
-	movs r1, 0x10
-	ldrsh r0, [r5, r1]
-	movs r2, 0x12
-	ldrsh r1, [r5, r2]
-	add r1, r10
-	lsls r4, 16
-	asrs r6, r4, 16
-	adds r1, r6
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 24
-	lsrs r0, 24
-	bl GetReflectionTypeByMetatileBehavior
-	lsls r0, 24
-	lsrs r0, 24
-	mov r9, r4
-	cmp r0, 0
-	bne _08063B82
-	movs r1, 0x14
-	ldrsh r0, [r5, r1]
-	movs r2, 0x16
-	ldrsh r1, [r5, r2]
-	add r1, r10
-	adds r1, r6
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 24
-	lsrs r0, 24
-	bl GetReflectionTypeByMetatileBehavior
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0
-	bne _08063B82
-	movs r2, 0x1
-	ldr r1, [sp]
-	lsls r0, r1, 16
-	asrs r1, r0, 16
-	mov r8, r0
-	cmp r2, r1
-	bge _08063B6E
-	movs r0, 0x80
-	lsls r0, 9
-	asrs r7, r0, 16
-_08063AD8:
-	movs r1, 0x10
-	ldrsh r0, [r5, r1]
-	lsls r1, r2, 16
-	asrs r4, r1, 16
-	adds r0, r4
-	movs r2, 0x12
-	ldrsh r1, [r5, r2]
-	adds r1, r7
-	adds r1, r6
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 24
-	lsrs r0, 24
-	bl GetReflectionTypeByMetatileBehavior
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0
-	bne _08063B82
-	movs r1, 0x10
-	ldrsh r0, [r5, r1]
-	subs r0, r4
-	movs r2, 0x12
-	ldrsh r1, [r5, r2]
-	adds r1, r7
-	adds r1, r6
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 24
-	lsrs r0, 24
-	bl GetReflectionTypeByMetatileBehavior
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0
-	bne _08063B82
-	movs r1, 0x14
-	ldrsh r0, [r5, r1]
-	adds r0, r4
-	movs r2, 0x16
-	ldrsh r1, [r5, r2]
-	adds r1, r7
-	adds r1, r6
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 24
-	lsrs r0, 24
-	bl GetReflectionTypeByMetatileBehavior
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0
-	bne _08063B82
-	movs r1, 0x14
-	ldrsh r0, [r5, r1]
-	subs r0, r4
-	movs r2, 0x16
-	ldrsh r1, [r5, r2]
-	adds r1, r7
-	adds r1, r6
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 24
-	lsrs r0, 24
-	bl GetReflectionTypeByMetatileBehavior
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0
-	bne _08063B82
-	adds r0, r4, 0x1
-	lsls r0, 16
-	lsrs r2, r0, 16
-	cmp r0, r8
-	blt _08063AD8
-_08063B6E:
-	movs r1, 0x80
-	lsls r1, 9
-	add r1, r9
-	lsrs r4, r1, 16
-	ldr r2, [sp, 0x4]
-	lsls r0, r2, 16
-	cmp r1, r0
-	bge _08063B80
-	b _08063A7E
-_08063B80:
-	movs r0, 0
-_08063B82:
-	add sp, 0x8
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end FieldObjectCheckForReflectiveSurface
-
-	thumb_func_start GetReflectionTypeByMetatileBehavior
-GetReflectionTypeByMetatileBehavior: @ 8063B94
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	adds r0, r4, 0
-	bl MetatileBehavior_IsIce
-	lsls r0, 24
-	cmp r0, 0
-	beq _08063BAA
-	movs r0, 0x1
-	b _08063BBC
-_08063BAA:
-	adds r0, r4, 0
-	bl MetatileBehavior_IsReflective
-	lsls r0, 24
-	cmp r0, 0
-	bne _08063BBA
-	movs r0, 0
-	b _08063BBC
-_08063BBA:
-	movs r0, 0x2
-_08063BBC:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end GetReflectionTypeByMetatileBehavior
-
-	thumb_func_start GetLedgeJumpDirection
-GetLedgeJumpDirection: @ 8063BC4
-	push {r4,lr}
-	lsls r0, 16
-	lsrs r3, r0, 16
-	lsls r1, 16
-	lsrs r1, 16
-	lsls r2, 24
-	lsrs r4, r2, 24
-	cmp r4, 0
-	beq _08063C0A
-	cmp r4, 0x4
-	bls _08063BE0
-	subs r0, r4, 0x4
-	lsls r0, 24
-	lsrs r4, r0, 24
-_08063BE0:
-	subs r0, r4, 0x1
-	lsls r0, 24
-	lsrs r4, r0, 24
-	lsls r0, r3, 16
-	asrs r0, 16
-	lsls r1, 16
-	asrs r1, 16
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r2, _08063C10 @ =gUnknown_08376040
-	lsls r1, r4, 2
-	adds r1, r2
-	ldr r1, [r1]
-	bl _call_via_r1
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _08063C14
-_08063C0A:
-	movs r0, 0
-	b _08063C1A
-	.align 2, 0
-_08063C10: .4byte gUnknown_08376040
-_08063C14:
-	adds r0, r4, 0x1
-	lsls r0, 24
-	lsrs r0, 24
-_08063C1A:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end GetLedgeJumpDirection
-
-	thumb_func_start FieldObjectSetSpriteOamTableForLongGrass
-FieldObjectSetSpriteOamTableForLongGrass: @ 8063C20
-	push {r4-r6,lr}
-	adds r5, r0, 0
-	adds r4, r1, 0
-	ldrb r0, [r5]
-	lsls r0, 27
-	cmp r0, 0
-	blt _08063C74
-	ldrb r0, [r5, 0x1E]
-	bl MetatileBehavior_IsLongGrass
-	lsls r0, 24
-	cmp r0, 0
-	beq _08063C74
-	ldrb r0, [r5, 0x1F]
-	bl MetatileBehavior_IsLongGrass
-	lsls r0, 24
-	cmp r0, 0
-	beq _08063C74
-	adds r4, 0x42
-	ldrb r1, [r4]
-	movs r6, 0x40
-	negs r6, r6
-	adds r0, r6, 0
-	ands r0, r1
-	movs r1, 0x4
-	orrs r0, r1
-	strb r0, [r4]
-	ldrb r0, [r5, 0xB]
-	lsrs r0, 4
-	bl ZCoordToPriority
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _08063C74
-	ldrb r0, [r4]
-	adds r1, r6, 0
-	ands r1, r0
-	movs r0, 0x5
-	orrs r1, r0
-	strb r1, [r4]
-_08063C74:
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	thumb_func_end FieldObjectSetSpriteOamTableForLongGrass
-
-	thumb_func_start IsZCoordMismatchAt
-IsZCoordMismatchAt: @ 8063C7C
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	lsls r1, 16
-	lsrs r0, r1, 16
-	lsls r2, 16
-	lsrs r1, r2, 16
-	cmp r4, 0
-	beq _08063CAA
-	lsls r0, 16
-	asrs r0, 16
-	lsls r1, 16
-	asrs r1, 16
-	bl MapGridGetZCoordAt
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0
-	beq _08063CAA
-	cmp r0, 0xF
-	beq _08063CAA
-	cmp r0, r4
-	bne _08063CAE
-_08063CAA:
-	movs r0, 0
-	b _08063CB0
-_08063CAE:
-	movs r0, 0x1
-_08063CB0:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end IsZCoordMismatchAt
-
-	thumb_func_start FieldObjectUpdateZCoordAndPriority
-FieldObjectUpdateZCoordAndPriority: @ 8063CB8
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldrb r0, [r4, 0x3]
-	lsls r0, 29
-	cmp r0, 0
-	blt _08063D06
-	adds r0, r4, 0
-	bl FieldObjectUpdateZCoord
-	ldr r1, _08063D0C @ =gFieldObjectPriorities_08376070
-	ldrb r2, [r4, 0xB]
-	lsls r2, 24
-	lsrs r0, r2, 28
-	adds r0, r1
-	ldrb r0, [r0]
-	adds r4, r5, 0
-	adds r4, 0x42
-	movs r1, 0x3F
-	ands r1, r0
-	ldrb r3, [r4]
-	movs r0, 0x40
-	negs r0, r0
-	ands r0, r3
-	orrs r0, r1
-	strb r0, [r4]
-	ldr r0, _08063D10 @ =gFieldObjectPriorities_08376060
-	lsrs r2, 28
-	adds r2, r0
-	movs r0, 0x3
-	ldrb r1, [r2]
-	ands r1, r0
-	lsls r1, 2
-	ldrb r2, [r5, 0x5]
-	movs r0, 0xD
-	negs r0, r0
-	ands r0, r2
-	orrs r0, r1
-	strb r0, [r5, 0x5]
-_08063D06:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08063D0C: .4byte gFieldObjectPriorities_08376070
-_08063D10: .4byte gFieldObjectPriorities_08376060
-	thumb_func_end FieldObjectUpdateZCoordAndPriority
-
-	thumb_func_start InitObjectPriorityByZCoord
-InitObjectPriorityByZCoord: @ 8063D14
-	push {r4,lr}
-	lsls r1, 24
-	lsrs r1, 24
-	ldr r2, _08063D58 @ =gFieldObjectPriorities_08376070
-	adds r2, r1, r2
-	ldrb r2, [r2]
-	movs r3, 0x42
-	adds r3, r0
-	mov r12, r3
-	movs r3, 0x3F
-	ands r3, r2
-	mov r2, r12
-	ldrb r4, [r2]
-	movs r2, 0x40
-	negs r2, r2
-	ands r2, r4
-	orrs r2, r3
-	mov r3, r12
-	strb r2, [r3]
-	ldr r2, _08063D5C @ =gFieldObjectPriorities_08376060
-	adds r1, r2
-	movs r3, 0x3
-	ldrb r2, [r1]
-	ands r2, r3
-	lsls r2, 2
-	ldrb r3, [r0, 0x5]
-	movs r1, 0xD
-	negs r1, r1
-	ands r1, r3
-	orrs r1, r2
-	strb r1, [r0, 0x5]
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08063D58: .4byte gFieldObjectPriorities_08376070
-_08063D5C: .4byte gFieldObjectPriorities_08376060
-	thumb_func_end InitObjectPriorityByZCoord
-
-	thumb_func_start ZCoordToPriority
-ZCoordToPriority: @ 8063D60
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r1, _08063D6C @ =gFieldObjectPriorities_08376060
-	adds r0, r1
-	ldrb r0, [r0]
-	bx lr
-	.align 2, 0
-_08063D6C: .4byte gFieldObjectPriorities_08376060
-	thumb_func_end ZCoordToPriority
-
-	thumb_func_start FieldObjectUpdateZCoord
-FieldObjectUpdateZCoord: @ 8063D70
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	movs r1, 0x10
-	ldrsh r0, [r4, r1]
-	movs r2, 0x12
-	ldrsh r1, [r4, r2]
-	bl MapGridGetZCoordAt
-	lsls r0, 24
-	lsrs r5, r0, 24
-	movs r1, 0x14
-	ldrsh r0, [r4, r1]
-	movs r2, 0x16
-	ldrsh r1, [r4, r2]
-	bl MapGridGetZCoordAt
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r5, 0xF
-	beq _08063DBE
-	cmp r0, 0xF
-	beq _08063DBE
-	movs r3, 0xF
-	adds r0, r5, 0
-	ands r0, r3
-	ldrb r1, [r4, 0xB]
-	movs r2, 0x10
-	negs r2, r2
-	ands r2, r1
-	orrs r2, r0
-	strb r2, [r4, 0xB]
-	cmp r5, 0
-	beq _08063DBE
-	cmp r5, 0xF
-	beq _08063DBE
-	lsls r0, r5, 4
-	ands r2, r3
-	orrs r2, r0
-	strb r2, [r4, 0xB]
-_08063DBE:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end FieldObjectUpdateZCoord
-
-	thumb_func_start SetObjectSubpriorityByZCoord
-SetObjectSubpriorityByZCoord: @ 8063DC4
-	push {r4,r5,lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r2, 24
-	lsrs r2, 24
-	adds r3, r1, 0
-	adds r3, 0x29
-	movs r5, 0
-	ldrsb r5, [r3, r5]
-	ldrh r4, [r1, 0x22]
-	ldr r3, _08063E04 @ =gSpriteCoordOffsetY
-	subs r4, r5
-	ldrh r3, [r3]
-	adds r4, r3
-	adds r4, 0x8
-	movs r3, 0xFF
-	ands r4, r3
-	lsrs r4, 4
-	movs r3, 0x10
-	subs r3, r4
-	lsls r3, 17
-	ldr r4, _08063E08 @ =gUnknown_08376050
-	adds r0, r4
-	lsrs r3, 16
-	ldrb r0, [r0]
-	adds r3, r0
-	adds r2, r3
-	adds r1, 0x43
-	strb r2, [r1]
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08063E04: .4byte gSpriteCoordOffsetY
-_08063E08: .4byte gUnknown_08376050
-	thumb_func_end SetObjectSubpriorityByZCoord
-
-	thumb_func_start FieldObjectUpdateSubpriority
-FieldObjectUpdateSubpriority: @ 8063E0C
-	push {lr}
-	adds r2, r0, 0
-	ldrb r0, [r2, 0x3]
-	lsls r0, 29
-	cmp r0, 0
-	blt _08063E22
-	ldrb r0, [r2, 0xB]
-	lsrs r0, 4
-	movs r2, 0x1
-	bl SetObjectSubpriorityByZCoord
-_08063E22:
-	pop {r0}
-	bx r0
-	thumb_func_end FieldObjectUpdateSubpriority
-
-	thumb_func_start AreZCoordsCompatible
-AreZCoordsCompatible: @ 8063E28
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	lsrs r1, 24
-	cmp r0, 0
-	beq _08063E3E
-	cmp r1, 0
-	beq _08063E3E
-	cmp r0, r1
-	bne _08063E42
-_08063E3E:
-	movs r0, 0x1
-	b _08063E44
-_08063E42:
-	movs r0, 0
-_08063E44:
-	pop {r1}
-	bx r1
-	thumb_func_end AreZCoordsCompatible
-
-	thumb_func_start GroundEffect_SpawnOnTallGrass
-GroundEffect_SpawnOnTallGrass: @ 8063E48
-	push {lr}
-	ldr r3, _08063E8C @ =gUnknown_0202FF84
-	movs r2, 0x10
-	ldrsh r1, [r0, r2]
-	str r1, [r3]
-	movs r2, 0x12
-	ldrsh r1, [r0, r2]
-	str r1, [r3, 0x4]
-	ldrb r1, [r0, 0xB]
-	lsrs r1, 4
-	str r1, [r3, 0x8]
-	movs r1, 0x2
-	str r1, [r3, 0xC]
-	ldrb r1, [r0, 0x8]
-	lsls r1, 8
-	ldrb r2, [r0, 0x9]
-	orrs r1, r2
-	str r1, [r3, 0x10]
-	ldrb r0, [r0, 0xA]
-	str r0, [r3, 0x14]
-	ldr r1, _08063E90 @ =gSaveBlock1
-	ldrb r0, [r1, 0x5]
-	lsls r0, 8
-	ldrb r1, [r1, 0x4]
-	orrs r0, r1
-	str r0, [r3, 0x18]
-	movs r0, 0x1
-	str r0, [r3, 0x1C]
-	movs r0, 0x4
-	bl FieldEffectStart
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08063E8C: .4byte gUnknown_0202FF84
-_08063E90: .4byte gSaveBlock1
-	thumb_func_end GroundEffect_SpawnOnTallGrass
-
-	thumb_func_start sub_8063E94
-sub_8063E94: @ 8063E94
-	push {lr}
-	ldr r3, _08063ED8 @ =gUnknown_0202FF84
-	movs r2, 0x10
-	ldrsh r1, [r0, r2]
-	str r1, [r3]
-	movs r2, 0x12
-	ldrsh r1, [r0, r2]
-	str r1, [r3, 0x4]
-	ldrb r1, [r0, 0xB]
-	lsrs r1, 4
-	str r1, [r3, 0x8]
-	movs r1, 0x2
-	str r1, [r3, 0xC]
-	ldrb r1, [r0, 0x8]
-	lsls r1, 8
-	ldrb r2, [r0, 0x9]
-	orrs r1, r2
-	str r1, [r3, 0x10]
-	ldrb r0, [r0, 0xA]
-	str r0, [r3, 0x14]
-	ldr r1, _08063EDC @ =gSaveBlock1
-	ldrb r0, [r1, 0x5]
-	lsls r0, 8
-	ldrb r1, [r1, 0x4]
-	orrs r0, r1
-	str r0, [r3, 0x18]
-	movs r0, 0
-	str r0, [r3, 0x1C]
-	movs r0, 0x4
-	bl FieldEffectStart
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08063ED8: .4byte gUnknown_0202FF84
-_08063EDC: .4byte gSaveBlock1
-	thumb_func_end sub_8063E94
-
-	thumb_func_start sub_8063EE0
-sub_8063EE0: @ 8063EE0
-	push {lr}
-	ldr r3, _08063F24 @ =gUnknown_0202FF84
-	movs r2, 0x10
-	ldrsh r1, [r0, r2]
-	str r1, [r3]
-	movs r2, 0x12
-	ldrsh r1, [r0, r2]
-	str r1, [r3, 0x4]
-	ldrb r1, [r0, 0xB]
-	lsrs r1, 4
-	str r1, [r3, 0x8]
-	movs r1, 0x2
-	str r1, [r3, 0xC]
-	ldrb r1, [r0, 0x8]
-	lsls r1, 8
-	ldrb r2, [r0, 0x9]
-	orrs r1, r2
-	str r1, [r3, 0x10]
-	ldrb r0, [r0, 0xA]
-	str r0, [r3, 0x14]
-	ldr r1, _08063F28 @ =gSaveBlock1
-	ldrb r0, [r1, 0x5]
-	lsls r0, 8
-	ldrb r1, [r1, 0x4]
-	orrs r0, r1
-	str r0, [r3, 0x18]
-	movs r0, 0x1
-	str r0, [r3, 0x1C]
-	movs r0, 0x11
-	bl FieldEffectStart
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08063F24: .4byte gUnknown_0202FF84
-_08063F28: .4byte gSaveBlock1
-	thumb_func_end sub_8063EE0
-
-	thumb_func_start sub_8063F2C
-sub_8063F2C: @ 8063F2C
-	push {lr}
-	ldr r3, _08063F70 @ =gUnknown_0202FF84
-	movs r2, 0x10
-	ldrsh r1, [r0, r2]
-	str r1, [r3]
-	movs r2, 0x12
-	ldrsh r1, [r0, r2]
-	str r1, [r3, 0x4]
-	ldrb r1, [r0, 0xB]
-	lsrs r1, 4
-	str r1, [r3, 0x8]
-	movs r1, 0x2
-	str r1, [r3, 0xC]
-	ldrb r1, [r0, 0x8]
-	lsls r1, 8
-	ldrb r2, [r0, 0x9]
-	orrs r1, r2
-	str r1, [r3, 0x10]
-	ldrb r0, [r0, 0xA]
-	str r0, [r3, 0x14]
-	ldr r1, _08063F74 @ =gSaveBlock1
-	ldrb r0, [r1, 0x5]
-	lsls r0, 8
-	ldrb r1, [r1, 0x4]
-	orrs r0, r1
-	str r0, [r3, 0x18]
-	movs r0, 0
-	str r0, [r3, 0x1C]
-	movs r0, 0x11
-	bl FieldEffectStart
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08063F70: .4byte gUnknown_0202FF84
-_08063F74: .4byte gSaveBlock1
-	thumb_func_end sub_8063F2C
-
-	thumb_func_start GroundEffect_WaterReflection
-GroundEffect_WaterReflection: @ 8063F78
-	push {lr}
-	movs r2, 0
-	bl SetUpReflection
-	pop {r0}
-	bx r0
-	thumb_func_end GroundEffect_WaterReflection
-
-	thumb_func_start GroundEffect_IceReflection
-GroundEffect_IceReflection: @ 8063F84
-	push {lr}
-	movs r2, 0x1
-	bl SetUpReflection
-	pop {r0}
-	bx r0
-	thumb_func_end GroundEffect_IceReflection
-
-	thumb_func_start GroundEffect_FlowingWater
-GroundEffect_FlowingWater: @ 8063F90
-	push {lr}
-	adds r1, r0, 0
-	movs r0, 0x22
-	bl oe_exec_and_other_stuff
-	pop {r0}
-	bx r0
-	thumb_func_end GroundEffect_FlowingWater
-
-	thumb_func_start sub_8063FA0
-sub_8063FA0: @ 8063FA0
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldrb r0, [r4, 0x5]
-	bl GetFieldObjectGraphicsInfo
-	ldr r1, _08063FC8 @ =gUnknown_08376080
-	ldrb r0, [r0, 0xD]
-	lsls r0, 2
-	adds r0, r1
-	ldr r3, [r0]
-	adds r0, r4, 0
-	adds r1, r5, 0
-	movs r2, 0
-	bl _call_via_r3
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08063FC8: .4byte gUnknown_08376080
-	thumb_func_end sub_8063FA0
-
-	thumb_func_start sub_8063FCC
-sub_8063FCC: @ 8063FCC
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldrb r0, [r4, 0x5]
-	bl GetFieldObjectGraphicsInfo
-	ldr r1, _08063FF4 @ =gUnknown_08376080
-	ldrb r0, [r0, 0xD]
-	lsls r0, 2
-	adds r0, r1
-	ldr r3, [r0]
-	adds r0, r4, 0
-	adds r1, r5, 0
-	movs r2, 0x1
-	bl _call_via_r3
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08063FF4: .4byte gUnknown_08376080
-	thumb_func_end sub_8063FCC
-
-	thumb_func_start nullsub_50
-nullsub_50: @ 8063FF8
-	bx lr
-	thumb_func_end nullsub_50
-
-	thumb_func_start DoTracksGroundEffect_Footprints
-DoTracksGroundEffect_Footprints: @ 8063FFC
-	push {r4,r5,lr}
-	sub sp, 0x4
-	adds r5, r0, 0
-	lsls r4, r2, 24
-	lsrs r4, 24
-	ldr r1, _08064044 @ =gSandFootprints_FieldEffectData
-	mov r0, sp
-	movs r2, 0x4
-	bl memcpy
-	ldr r1, _08064048 @ =gUnknown_0202FF84
-	movs r2, 0x14
-	ldrsh r0, [r5, r2]
-	str r0, [r1]
-	movs r2, 0x16
-	ldrsh r0, [r5, r2]
-	str r0, [r1, 0x4]
-	movs r0, 0x95
-	str r0, [r1, 0x8]
-	movs r0, 0x2
-	str r0, [r1, 0xC]
-	ldrb r0, [r5, 0x18]
-	lsls r0, 28
-	lsrs r0, 28
-	str r0, [r1, 0x10]
-	lsls r4, 1
-	mov r1, sp
-	adds r0, r1, r4
-	ldrb r0, [r0]
-	bl FieldEffectStart
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08064044: .4byte gSandFootprints_FieldEffectData
-_08064048: .4byte gUnknown_0202FF84
-	thumb_func_end DoTracksGroundEffect_Footprints
-
-	thumb_func_start DoTracksGroundEffect_BikeTireTracks
-DoTracksGroundEffect_BikeTireTracks: @ 806404C
-	push {r4,lr}
-	adds r4, r0, 0
-	ldr r1, [r4, 0x10]
-	ldr r0, [r4, 0x14]
-	cmp r1, r0
-	beq _0806408E
-	ldr r2, _08064094 @ =gUnknown_0202FF84
-	movs r1, 0x14
-	ldrsh r0, [r4, r1]
-	str r0, [r2]
-	movs r1, 0x16
-	ldrsh r0, [r4, r1]
-	str r0, [r2, 0x4]
-	movs r0, 0x95
-	str r0, [r2, 0x8]
-	movs r0, 0x2
-	str r0, [r2, 0xC]
-	ldr r3, _08064098 @ =gBikeTireTracks_Transitions
-	ldrb r1, [r4, 0x18]
-	lsls r1, 28
-	lsrs r1, 28
-	adds r0, r4, 0
-	adds r0, 0x20
-	ldrb r0, [r0]
-	lsls r0, 2
-	subs r0, 0x5
-	adds r1, r0
-	adds r1, r3
-	ldrb r0, [r1]
-	str r0, [r2, 0x10]
-	movs r0, 0x23
-	bl FieldEffectStart
-_0806408E:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08064094: .4byte gUnknown_0202FF84
-_08064098: .4byte gBikeTireTracks_Transitions
-	thumb_func_end DoTracksGroundEffect_BikeTireTracks
-
-	thumb_func_start GroundEffect_Ripple
-GroundEffect_Ripple: @ 806409C
-	push {lr}
-	bl DoRippleFieldEffect
-	pop {r0}
-	bx r0
-	thumb_func_end GroundEffect_Ripple
-
-	thumb_func_start GroundEffect_StepOnPuddle
-GroundEffect_StepOnPuddle: @ 80640A8
-	push {lr}
-	adds r1, r0, 0
-	movs r0, 0xF
-	bl oe_exec_and_other_stuff
-	pop {r0}
-	bx r0
-	thumb_func_end GroundEffect_StepOnPuddle
-
-	thumb_func_start GroundEffect_SandPile
-GroundEffect_SandPile: @ 80640B8
-	push {lr}
-	adds r1, r0, 0
-	movs r0, 0x27
-	bl oe_exec_and_other_stuff
-	pop {r0}
-	bx r0
-	thumb_func_end GroundEffect_SandPile
-
-	thumb_func_start GroundEffect_JumpOnTallGrass
-GroundEffect_JumpOnTallGrass: @ 80640C8
-	push {r4-r7,lr}
-	sub sp, 0x4
-	adds r5, r0, 0
-	adds r6, r1, 0
-	ldr r1, _0806411C @ =gUnknown_0202FF84
-	movs r2, 0x10
-	ldrsh r0, [r5, r2]
-	str r0, [r1]
-	movs r4, 0x12
-	ldrsh r0, [r5, r4]
-	str r0, [r1, 0x4]
-	ldrb r0, [r5, 0xB]
-	lsrs r0, 4
-	str r0, [r1, 0x8]
-	movs r0, 0x2
-	str r0, [r1, 0xC]
-	movs r0, 0xC
-	bl FieldEffectStart
-	ldrb r0, [r5, 0x8]
-	ldrb r1, [r5, 0x9]
-	ldrb r2, [r5, 0xA]
-	movs r7, 0x10
-	ldrsh r3, [r5, r7]
-	movs r7, 0x12
-	ldrsh r4, [r5, r7]
-	str r4, [sp]
-	bl sub_8126FF0
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x40
-	bne _08064112
-	adds r0, r5, 0
-	adds r1, r6, 0
-	bl GroundEffect_SpawnOnTallGrass
-_08064112:
-	add sp, 0x4
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0806411C: .4byte gUnknown_0202FF84
-	thumb_func_end GroundEffect_JumpOnTallGrass
-
-	thumb_func_start GroundEffect_JumpOnLongGrass
-GroundEffect_JumpOnLongGrass: @ 8064120
-	push {lr}
-	ldr r2, _08064144 @ =gUnknown_0202FF84
-	movs r3, 0x10
-	ldrsh r1, [r0, r3]
-	str r1, [r2]
-	movs r3, 0x12
-	ldrsh r1, [r0, r3]
-	str r1, [r2, 0x4]
-	ldrb r0, [r0, 0xB]
-	lsrs r0, 4
-	str r0, [r2, 0x8]
-	movs r0, 0x2
-	str r0, [r2, 0xC]
-	movs r0, 0x12
-	bl FieldEffectStart
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08064144: .4byte gUnknown_0202FF84
-	thumb_func_end GroundEffect_JumpOnLongGrass
-
-	thumb_func_start GroundEffect_JumpOnShallowWater
-GroundEffect_JumpOnShallowWater: @ 8064148
-	push {r4,lr}
-	ldr r3, _08064174 @ =gUnknown_0202FF84
-	movs r4, 0x10
-	ldrsh r2, [r0, r4]
-	str r2, [r3]
-	movs r4, 0x12
-	ldrsh r2, [r0, r4]
-	str r2, [r3, 0x4]
-	ldrb r0, [r0, 0xB]
-	lsrs r0, 4
-	str r0, [r3, 0x8]
-	ldrb r0, [r1, 0x5]
-	lsls r0, 28
-	lsrs r0, 30
-	str r0, [r3, 0xC]
-	movs r0, 0x10
-	bl FieldEffectStart
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08064174: .4byte gUnknown_0202FF84
-	thumb_func_end GroundEffect_JumpOnShallowWater
-
-	thumb_func_start GroundEffect_JumpOnWater
-GroundEffect_JumpOnWater: @ 8064178
-	push {r4,lr}
-	ldr r3, _080641A4 @ =gUnknown_0202FF84
-	movs r4, 0x10
-	ldrsh r2, [r0, r4]
-	str r2, [r3]
-	movs r4, 0x12
-	ldrsh r2, [r0, r4]
-	str r2, [r3, 0x4]
-	ldrb r0, [r0, 0xB]
-	lsrs r0, 4
-	str r0, [r3, 0x8]
-	ldrb r0, [r1, 0x5]
-	lsls r0, 28
-	lsrs r0, 30
-	str r0, [r3, 0xC]
-	movs r0, 0xE
-	bl FieldEffectStart
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080641A4: .4byte gUnknown_0202FF84
-	thumb_func_end GroundEffect_JumpOnWater
-
-	thumb_func_start GroundEffect_JumpLandingDust
-GroundEffect_JumpLandingDust: @ 80641A8
-	push {r4,lr}
-	ldr r3, _080641D4 @ =gUnknown_0202FF84
-	movs r4, 0x10
-	ldrsh r2, [r0, r4]
-	str r2, [r3]
-	movs r4, 0x12
-	ldrsh r2, [r0, r4]
-	str r2, [r3, 0x4]
-	ldrb r0, [r0, 0xB]
-	lsrs r0, 4
-	str r0, [r3, 0x8]
-	ldrb r0, [r1, 0x5]
-	lsls r0, 28
-	lsrs r0, 30
-	str r0, [r3, 0xC]
-	movs r0, 0xA
-	bl FieldEffectStart
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080641D4: .4byte gUnknown_0202FF84
-	thumb_func_end GroundEffect_JumpLandingDust
-
-	thumb_func_start GroundEffect_ShortGrass
-GroundEffect_ShortGrass: @ 80641D8
-	push {lr}
-	adds r1, r0, 0
-	movs r0, 0x29
-	bl oe_exec_and_other_stuff
-	pop {r0}
-	bx r0
-	thumb_func_end GroundEffect_ShortGrass
-
-	thumb_func_start GroundEffect_HotSprings
-GroundEffect_HotSprings: @ 80641E8
-	push {lr}
-	adds r1, r0, 0
-	movs r0, 0x2A
-	bl oe_exec_and_other_stuff
-	pop {r0}
-	bx r0
-	thumb_func_end GroundEffect_HotSprings
-
-	thumb_func_start GroundEffect_Seaweed
-GroundEffect_Seaweed: @ 80641F8
-	push {lr}
-	ldr r2, _08064214 @ =gUnknown_0202FF84
-	movs r3, 0x10
-	ldrsh r1, [r0, r3]
-	str r1, [r2]
-	movs r1, 0x12
-	ldrsh r0, [r0, r1]
-	str r0, [r2, 0x4]
-	movs r0, 0x35
-	bl FieldEffectStart
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08064214: .4byte gUnknown_0202FF84
-	thumb_func_end GroundEffect_Seaweed
-
-	thumb_func_start sub_8064218
-sub_8064218: @ 8064218
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	adds r7, r0, 0
-	adds r6, r1, 0
-	adds r5, r2, 0
-	movs r4, 0
-	ldr r0, _08064258 @ =gUnknown_083760A0
-	mov r8, r0
-_0806422A:
-	movs r0, 0x1
-	ands r0, r5
-	cmp r0, 0
-	beq _08064240
-	lsls r0, r4, 2
-	add r0, r8
-	ldr r2, [r0]
-	adds r0, r7, 0
-	adds r1, r6, 0
-	bl _call_via_r2
-_08064240:
-	adds r0, r4, 0x1
-	lsls r0, 24
-	lsrs r4, r0, 24
-	lsrs r5, 1
-	cmp r4, 0x13
-	bls _0806422A
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08064258: .4byte gUnknown_083760A0
-	thumb_func_end sub_8064218
-
-	thumb_func_start filters_out_some_ground_effects
-filters_out_some_ground_effects: @ 806425C
-	push {lr}
-	adds r2, r0, 0
-	adds r3, r1, 0
-	ldrb r0, [r2]
-	lsls r0, 27
-	cmp r0, 0
-	bge _0806428A
-	ldrb r1, [r2, 0x2]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	movs r1, 0x11
-	negs r1, r1
-	ands r0, r1
-	adds r1, 0x8
-	ands r0, r1
-	subs r1, 0x18
-	ands r0, r1
-	strb r0, [r2, 0x2]
-	ldr r0, [r3]
-	ldr r1, _08064290 @ =0xfff9f7bd
-	ands r0, r1
-	str r0, [r3]
-_0806428A:
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08064290: .4byte 0xfff9f7bd
-	thumb_func_end filters_out_some_ground_effects
-
-	thumb_func_start FilterOutStepOnPuddleGroundEffectIfJumping
-FilterOutStepOnPuddleGroundEffectIfJumping: @ 8064294
-	push {lr}
-	adds r2, r1, 0
-	ldrb r0, [r0]
-	lsls r0, 26
-	cmp r0, 0
-	bge _080642A8
-	ldr r0, [r2]
-	ldr r1, _080642AC @ =0xfffffbff
-	ands r0, r1
-	str r0, [r2]
-_080642A8:
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080642AC: .4byte 0xfffffbff
-	thumb_func_end FilterOutStepOnPuddleGroundEffectIfJumping
-
-	thumb_func_start DoGroundEffects_OnSpawn
-DoGroundEffects_OnSpawn: @ 80642B0
-	push {r4,r5,lr}
-	sub sp, 0x4
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldrb r0, [r4]
-	lsls r0, 29
-	cmp r0, 0
-	bge _080642F4
-	movs r0, 0
-	str r0, [sp]
-	adds r0, r4, 0
-	bl FieldObjectUpdateZCoordAndPriority
-	adds r0, r4, 0
-	mov r1, sp
-	bl GetAllGroundEffectFlags_OnSpawn
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl FieldObjectSetSpriteOamTableForLongGrass
-	ldr r2, [sp]
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl sub_8064218
-	ldrb r1, [r4]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	movs r1, 0x11
-	negs r1, r1
-	ands r0, r1
-	strb r0, [r4]
-_080642F4:
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end DoGroundEffects_OnSpawn
-
-	thumb_func_start DoGroundEffects_OnBeginStep
-DoGroundEffects_OnBeginStep: @ 80642FC
-	push {r4,r5,lr}
-	sub sp, 0x4
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldrb r0, [r4]
-	lsls r0, 29
-	cmp r0, 0
-	bge _08064348
-	movs r0, 0
-	str r0, [sp]
-	adds r0, r4, 0
-	bl FieldObjectUpdateZCoordAndPriority
-	adds r0, r4, 0
-	mov r1, sp
-	bl GetAllGroundEffectFlags_OnBeginStep
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl FieldObjectSetSpriteOamTableForLongGrass
-	adds r0, r4, 0
-	mov r1, sp
-	bl filters_out_some_ground_effects
-	ldr r2, [sp]
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl sub_8064218
-	ldrb r1, [r4]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	movs r1, 0x11
-	negs r1, r1
-	ands r0, r1
-	strb r0, [r4]
-_08064348:
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end DoGroundEffects_OnBeginStep
-
-	thumb_func_start DoGroundEffects_OnFinishStep
-DoGroundEffects_OnFinishStep: @ 8064350
-	push {r4,r5,lr}
-	sub sp, 0x4
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldrb r0, [r4]
-	lsls r0, 28
-	cmp r0, 0
-	bge _0806439C
-	movs r0, 0
-	str r0, [sp]
-	adds r0, r4, 0
-	bl FieldObjectUpdateZCoordAndPriority
-	adds r0, r4, 0
-	mov r1, sp
-	bl GetAllGroundEffectFlags_OnFinishStep
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl FieldObjectSetSpriteOamTableForLongGrass
-	adds r0, r4, 0
-	mov r1, sp
-	bl FilterOutStepOnPuddleGroundEffectIfJumping
-	ldr r2, [sp]
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl sub_8064218
-	ldrb r1, [r4]
-	movs r0, 0x9
-	negs r0, r0
-	ands r0, r1
-	movs r1, 0x21
-	negs r1, r1
-	ands r0, r1
-	strb r0, [r4]
-_0806439C:
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end DoGroundEffects_OnFinishStep
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/data/field_ground_effect.s b/data/field_ground_effect.s
deleted file mode 100644
index d3dbceedb..000000000
--- a/data/field_ground_effect.s
+++ /dev/null
@@ -1,72 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.section .rodata
-
-	.align 2
-gUnknown_08376040:: @ 8376040
-	.4byte MetatileBehavior_IsJumpSouth
-	.4byte MetatileBehavior_IsJumpNorth
-	.4byte MetatileBehavior_IsJumpWest
-	.4byte MetatileBehavior_IsJumpEast
-
-gUnknown_08376050:: @ 8376050
-	.byte 0x73, 0x73, 0x53, 0x73, 0x53, 0x73, 0x53, 0x73, 0x53, 0x73, 0x53, 0x73, 0x53, 0x00, 0x00, 0x73
-
-@ Each byte corresponds to a sprite priority for a field object.
-@ This is directly the inverse of gFieldObjectPriorities_08376070.
-gFieldObjectPriorities_08376060:: @ 8376060
-	.byte 2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 0, 0, 2
-
-@ Each byte corresponds to a sprite priority for a field object.
-@ This is the inverse of gFieldObjectPriorities_08376060.
-@ 1 = Above player sprite
-@ 2 = Below player sprite
-gFieldObjectPriorities_08376070:: @ 8376070
-	.byte 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 0, 0, 1
-
-	.align 2
-gUnknown_08376080:: @ 8376080
-	.4byte nullsub_50
-	.4byte DoTracksGroundEffect_Footprints
-	.4byte DoTracksGroundEffect_BikeTireTracks
-
-@ First byte is a Field Effect script id. (gFieldEffectScriptPointers)
-@ Last three bytes are unknown.
-gSandFootprints_FieldEffectData:: @ 837608C
-	.byte 0xD, 0x0, 0x18, 0x0
-
-@ Specifies which bike track shape to show next.
-@ For example, when the bike turns from up to right, it will show
-@ a track that curves to the right.
-@ Each 4-byte row corresponds to the initial direction of the bike, and
-@ each byte in that row is for the next direction of the bike in the order
-@ of down, up, left, right.
-gBikeTireTracks_Transitions:: @ 8376090
-	.byte 1, 2, 7, 8
-	.byte 1, 2, 6, 5
-	.byte 5, 8, 3, 4
-	.byte 6, 7, 3, 4
-
-	.align 2
-gUnknown_083760A0:: @ 83760A0
-	.4byte GroundEffect_SpawnOnTallGrass
-	.4byte sub_8063E94
-	.4byte sub_8063EE0
-	.4byte sub_8063F2C
-	.4byte GroundEffect_WaterReflection
-	.4byte GroundEffect_IceReflection
-	.4byte GroundEffect_FlowingWater
-	.4byte sub_8063FA0
-	.4byte sub_8063FCC
-	.4byte GroundEffect_Ripple
-	.4byte GroundEffect_StepOnPuddle
-	.4byte GroundEffect_SandPile
-	.4byte GroundEffect_JumpOnTallGrass
-	.4byte GroundEffect_JumpOnLongGrass
-	.4byte GroundEffect_JumpOnShallowWater
-	.4byte GroundEffect_JumpOnWater
-	.4byte GroundEffect_JumpLandingDust
-	.4byte GroundEffect_ShortGrass
-	.4byte GroundEffect_HotSprings
-	.4byte GroundEffect_Seaweed
diff --git a/include/field_effect_helpers.h b/include/field_effect_helpers.h
index a1dd53a2b..11e96254d 100644
--- a/include/field_effect_helpers.h
+++ b/include/field_effect_helpers.h
@@ -27,5 +27,8 @@ void sub_8127ED0(u8, u8);
 void sub_8127F28(u8, u8, s16);
 u8 sub_8128124(u8 id);
 void ash(s16, s16, u16, u8);
+void SetUpReflection(struct MapObject *mapObj, struct Sprite *sprite, u8 a);
+u32 oe_exec_and_other_stuff(u8 fieldEffectId, struct MapObject *mapObject);
+u8 sub_8126FF0(u8 localId, u8 mapNum, u8 mapGroup, s16 x, s16 y);
 
 #endif // GUARD_FIELD_EFFECT_HELPERS_H
diff --git a/include/field_map_obj_helpers.h b/include/field_map_obj_helpers.h
index fd29a9a7f..f760bf153 100644
--- a/include/field_map_obj_helpers.h
+++ b/include/field_map_obj_helpers.h
@@ -18,4 +18,6 @@ void DoShadowFieldEffect(struct MapObject *mapObject);
 u8 sub_8064704(struct Sprite *);
 u8 sub_806478C(struct Sprite *);
 void obj_anim_image_set_and_seek(struct Sprite *sprite, u8 a2, u8 a3);
+void DoRippleFieldEffect(struct MapObject *mapObj, struct Sprite *sprite);
+
 #endif
diff --git a/ld_script.txt b/ld_script.txt
index c640ad5cc..4cd697281 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -96,7 +96,6 @@ SECTIONS {
         asm/field_map_obj.o(.text);
         src/field_map_obj.o(.text_fmocb2_c);
         src/field_ground_effect.o(.text);
-        asm/field_ground_effect.o(.text);
         src/field_map_obj_helpers.o(.text);
         src/field_message_box.o(.text);
         src/map_obj_lock.o(.text);
@@ -355,7 +354,6 @@ SECTIONS {
         src/field_player_avatar.o(.rodata);
         src/field_map_obj.o(.rodata);
         src/field_ground_effect.o(.rodata);
-        data/field_ground_effect.o(.rodata);
         data/field_map_obj_helpers.o(.rodata);
         data/text_window.o(.rodata);
         src/script.o(.rodata);
diff --git a/src/field_ground_effect.c b/src/field_ground_effect.c
index 42862d0ff..b9935463b 100644
--- a/src/field_ground_effect.c
+++ b/src/field_ground_effect.c
@@ -1,11 +1,38 @@
 #include "global.h"
 #include "field_ground_effect.h"
+#include "field_effect.h"
+#include "field_effect_helpers.h"
+#include "field_map_obj_helpers.h"
 #include "fieldmap.h"
 #include "metatile_behavior.h"
 
-extern u32 gUnknown_08376008[];
+static void nullsub(struct MapObject *mapObj, struct Sprite *sprite, u8);
+static void DoTracksGroundEffect_Footprints(struct MapObject *mapObj, struct Sprite *sprite, u8);
+static void DoTracksGroundEffect_BikeTireTracks(
+    struct MapObject *mapObj, struct Sprite *sprite, u8);
+void GroundEffect_SpawnOnTallGrass(struct MapObject *mapObj, struct Sprite *sprite);
+void sub_8063E94(struct MapObject *mapObj, struct Sprite *sprite);
+void sub_8063EE0(struct MapObject *mapObj, struct Sprite *sprite);
+void sub_8063F2C(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_WaterReflection(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_IceReflection(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_FlowingWater(struct MapObject *mapObj, struct Sprite *sprite);
+void sub_8063FA0(struct MapObject *mapObj, struct Sprite *sprite);
+void sub_8063FCC(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_Ripple(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_StepOnPuddle(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_SandPile(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_JumpOnTallGrass(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_JumpOnLongGrass(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_JumpOnShallowWater(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_JumpOnWater(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_JumpLandingDust(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_ShortGrass(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_HotSprings(struct MapObject *mapObj, struct Sprite *sprite);
+void GroundEffect_Seaweed(struct MapObject *mapObj, struct Sprite *sprite);
+u8 GetReflectionTypeByMetatileBehavior(u32 behavior);
 
-void GetAllGroundEffectFlags_OnSpawn(struct MapObject *mapObj, u32 *flags)
+static void GetAllGroundEffectFlags_OnSpawn(struct MapObject *mapObj, u32 *flags)
 {
     FieldObjectUpdateMetatileBehaviors(mapObj);
     GetGroundEffectFlags_Reflection(mapObj, flags);
@@ -17,7 +44,7 @@ void GetAllGroundEffectFlags_OnSpawn(struct MapObject *mapObj, u32 *flags)
     GetGroundEffectFlags_HotSprings(mapObj, flags);
 }
 
-void GetAllGroundEffectFlags_OnBeginStep(struct MapObject *mapObj, u32 *flags)
+static void GetAllGroundEffectFlags_OnBeginStep(struct MapObject *mapObj, u32 *flags)
 {
     FieldObjectUpdateMetatileBehaviors(mapObj);
     GetGroundEffectFlags_Reflection(mapObj, flags);
@@ -31,7 +58,7 @@ void GetAllGroundEffectFlags_OnBeginStep(struct MapObject *mapObj, u32 *flags)
     GetGroundEffectFlags_HotSprings(mapObj, flags);
 }
 
-void GetAllGroundEffectFlags_OnFinishStep(struct MapObject *mapObj, u32 *flags)
+static void GetAllGroundEffectFlags_OnFinishStep(struct MapObject *mapObj, u32 *flags)
 {
     FieldObjectUpdateMetatileBehaviors(mapObj);
     GetGroundEffectFlags_ShallowFlowingWater(mapObj, flags);
@@ -101,7 +128,7 @@ void GetGroundEffectFlags_Tracks(struct MapObject *mapObj, u32 *flags)
         *flags |= 0x100;
     }
     else if (MetatileBehavior_IsSandOrDeepSand(mapObj->mapobj_unk_1F)
-     || MetatileBehavior_IsUnusedFootprintMetatile(mapObj->mapobj_unk_1F))
+             || MetatileBehavior_IsUnusedFootprintMetatile(mapObj->mapobj_unk_1F))
     {
         *flags |= 0x80;
     }
@@ -110,7 +137,7 @@ void GetGroundEffectFlags_Tracks(struct MapObject *mapObj, u32 *flags)
 void GetGroundEffectFlags_SandPile(struct MapObject *mapObj, u32 *flags)
 {
     if (MetatileBehavior_IsDeepSand(mapObj->mapobj_unk_1E)
-     && MetatileBehavior_IsDeepSand(mapObj->mapobj_unk_1F))
+        && MetatileBehavior_IsDeepSand(mapObj->mapobj_unk_1F))
     {
         if (!mapObj->mapobj_bit_20)
         {
@@ -127,8 +154,10 @@ void GetGroundEffectFlags_SandPile(struct MapObject *mapObj, u32 *flags)
 
 void GetGroundEffectFlags_ShallowFlowingWater(struct MapObject *mapObj, u32 *flags)
 {
-    if ((MetatileBehavior_IsShallowFlowingWater(mapObj->mapobj_unk_1E) && MetatileBehavior_IsShallowFlowingWater(mapObj->mapobj_unk_1F))
-     || (MetatileBehavior_IsPacifidlogLog(mapObj->mapobj_unk_1E) && MetatileBehavior_IsPacifidlogLog(mapObj->mapobj_unk_1F)))
+    if ((MetatileBehavior_IsShallowFlowingWater(mapObj->mapobj_unk_1E)
+         && MetatileBehavior_IsShallowFlowingWater(mapObj->mapobj_unk_1F))
+        || (MetatileBehavior_IsPacifidlogLog(mapObj->mapobj_unk_1E)
+            && MetatileBehavior_IsPacifidlogLog(mapObj->mapobj_unk_1F)))
     {
         if (!mapObj->mapobj_bit_19)
         {
@@ -146,7 +175,7 @@ void GetGroundEffectFlags_ShallowFlowingWater(struct MapObject *mapObj, u32 *fla
 void GetGroundEffectFlags_Puddle(struct MapObject *mapObj, u32 *flags)
 {
     if (MetatileBehavior_IsPuddle(mapObj->mapobj_unk_1E)
-     && MetatileBehavior_IsPuddle(mapObj->mapobj_unk_1F))
+        && MetatileBehavior_IsPuddle(mapObj->mapobj_unk_1F))
     {
         *flags |= 0x400;
     }
@@ -161,7 +190,7 @@ void GetGroundEffectFlags_Ripple(struct MapObject *mapObj, u32 *flags)
 void GetGroundEffectFlags_ShortGrass(struct MapObject *mapObj, u32 *flags)
 {
     if (MetatileBehavior_IsShortGrass(mapObj->mapobj_unk_1E)
-     && MetatileBehavior_IsShortGrass(mapObj->mapobj_unk_1F))
+        && MetatileBehavior_IsShortGrass(mapObj->mapobj_unk_1F))
     {
         if (!mapObj->mapobj_bit_18)
         {
@@ -179,7 +208,7 @@ void GetGroundEffectFlags_ShortGrass(struct MapObject *mapObj, u32 *flags)
 void GetGroundEffectFlags_HotSprings(struct MapObject *mapObj, u32 *flags)
 {
     if (MetatileBehavior_IsHotSprings(mapObj->mapobj_unk_1E)
-     && MetatileBehavior_IsHotSprings(mapObj->mapobj_unk_1F))
+        && MetatileBehavior_IsHotSprings(mapObj->mapobj_unk_1F))
     {
         if (!mapObj->mapobj_bit_21)
         {
@@ -204,8 +233,7 @@ void GetGroundEffectFlags_JumpLanding(struct MapObject *mapObj, u32 *flags)
 {
     typedef bool8 (*MetatileFunc)(u8);
 
-    static const MetatileFunc metatileFuncs[] =
-    {
+    static const MetatileFunc metatileFuncs[] = {
         MetatileBehavior_IsTallGrass,
         MetatileBehavior_IsLongGrass,
         MetatileBehavior_IsPuddle,
@@ -214,14 +242,13 @@ void GetGroundEffectFlags_JumpLanding(struct MapObject *mapObj, u32 *flags)
         MetatileBehavior_IsATile,
     };
 
-    static const u32 jumpLandingFlags[] =
-    {
-        0x00001000,  // Landing in tall grass
-        0x00002000,  // Landing in long grass
-        0x00004000,  // Landing on puddle
-        0x00008000,  // Landing on surfable water or underwater
-        0x00004000,  // Landing on shallow flowing water
-        0x00010000,  // Landing on any other type of ground
+    static const u32 jumpLandingFlags[] = {
+        0x00001000, // Landing in tall grass
+        0x00002000, // Landing in long grass
+        0x00004000, // Landing on puddle
+        0x00008000, // Landing on surfable water or underwater
+        0x00004000, // Landing on shallow flowing water
+        0x00010000, // Landing on any other type of ground
     };
 
     if (mapObj->mapobj_bit_5 && !mapObj->mapobj_bit_25)
@@ -238,3 +265,529 @@ void GetGroundEffectFlags_JumpLanding(struct MapObject *mapObj, u32 *flags)
         }
     }
 }
+
+u8 FieldObjectCheckForReflectiveSurface(struct MapObject *mapObj)
+{
+    const struct MapObjectGraphicsInfo *info = GetFieldObjectGraphicsInfo(mapObj->graphicsId);
+
+    // ceil div by tile width?
+    s16 width = (info->width + 8) >> 4;
+    s16 height = (info->height + 8) >> 4;
+    s16 i;
+    s16 j;
+    u8 result;
+    u8 b;
+    s16 one;
+
+#define RETURN_REFLECTION_TYPE_AT(x, y)              \
+    b = MapGridGetMetatileBehaviorAt(x, y);          \
+    result = GetReflectionTypeByMetatileBehavior(b); \
+    if (result != 0)                                 \
+        return result;
+
+    for (i = 0, one = 1; i < height; i++)
+    {
+        RETURN_REFLECTION_TYPE_AT(mapObj->coords2.x, mapObj->coords2.y + one + i)
+        RETURN_REFLECTION_TYPE_AT(mapObj->coords3.x, mapObj->coords3.y + one + i)
+        for (j = 1; j < width; j++)
+        {
+            RETURN_REFLECTION_TYPE_AT(mapObj->coords2.x + j, mapObj->coords2.y + one + i)
+            RETURN_REFLECTION_TYPE_AT(mapObj->coords2.x - j, mapObj->coords2.y + one + i)
+            RETURN_REFLECTION_TYPE_AT(mapObj->coords3.x + j, mapObj->coords3.y + one + i)
+            RETURN_REFLECTION_TYPE_AT(mapObj->coords3.x - j, mapObj->coords3.y + one + i)
+        }
+    }
+    return 0;
+
+#undef RETURN_REFLECTION_TYPE_AT
+}
+
+u8 GetReflectionTypeByMetatileBehavior(u32 behavior)
+{
+    if (MetatileBehavior_IsIce(behavior))
+        return 1;
+    else if (MetatileBehavior_IsReflective(behavior))
+        return 2;
+    else
+        return 0;
+}
+
+u8 GetLedgeJumpDirection(s16 x, s16 y, u8 z)
+{
+    static bool8 (*const unknown_08376040[])(u8) = {
+        MetatileBehavior_IsJumpSouth,
+        MetatileBehavior_IsJumpNorth,
+        MetatileBehavior_IsJumpWest,
+        MetatileBehavior_IsJumpEast,
+    };
+
+    u8 b;
+    u8 index = z;
+
+    if (index == 0)
+        return 0;
+    else if (index > 4)
+        index -= 4;
+
+    index--;
+    b = MapGridGetMetatileBehaviorAt(x, y);
+
+    if (unknown_08376040[index](b) == 1)
+        return index + 1;
+
+    return 0;
+}
+
+void FieldObjectSetSpriteOamTableForLongGrass(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    if (mapObj->mapobj_bit_4)
+        return;
+
+    if (!MetatileBehavior_IsLongGrass(mapObj->mapobj_unk_1E))
+        return;
+
+    if (!MetatileBehavior_IsLongGrass(mapObj->mapobj_unk_1F))
+        return;
+
+    sprite->subspriteTableNum = 4;
+
+    if (ZCoordToPriority(mapObj->elevation) == 1)
+        sprite->subspriteTableNum = 5;
+}
+
+bool8 IsZCoordMismatchAt(u8 z, s16 x, s16 y)
+{
+    u8 mapZ;
+
+    if (z == 0)
+        return FALSE;
+
+    mapZ = MapGridGetZCoordAt(x, y);
+
+    if (mapZ == 0 || mapZ == 0xF)
+        return FALSE;
+
+    if (mapZ != z)
+        return TRUE;
+
+    return FALSE;
+}
+
+static const u8 sUnknown_08376050[] = {
+    0x73, 0x73, 0x53, 0x73, 0x53, 0x73, 0x53, 0x73, 0x53, 0x73, 0x53, 0x73, 0x53, 0x00, 0x00, 0x73
+};
+
+// Each byte corresponds to a sprite priority for a field object.
+// This is directly the inverse of gFieldObjectPriorities_08376070.
+static const u8 sFieldObjectPriorities_08376060[] = {
+    2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 0, 0, 2
+};
+
+// Each byte corresponds to a sprite priority for a field object.
+// This is the inverse of gFieldObjectPriorities_08376060.
+// 1 = Above player sprite
+// 2 = Below player sprite
+static const u8 sFieldObjectPriorities_08376070[] = {
+    1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 0, 0, 1,
+};
+
+void FieldObjectUpdateZCoordAndPriority(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    if (mapObj->mapobj_bit_26)
+        return;
+
+    FieldObjectUpdateZCoord(mapObj);
+
+    sprite->subspriteTableNum = sFieldObjectPriorities_08376070[mapObj->elevation];
+    sprite->oam.priority = sFieldObjectPriorities_08376060[mapObj->elevation];
+}
+
+void InitObjectPriorityByZCoord(struct Sprite *sprite, u8 z)
+{
+    sprite->subspriteTableNum = sFieldObjectPriorities_08376070[z];
+    sprite->oam.priority = sFieldObjectPriorities_08376060[z];
+}
+
+u8 ZCoordToPriority(u8 z)
+{
+    return sFieldObjectPriorities_08376060[z];
+}
+
+void FieldObjectUpdateZCoord(struct MapObject *mapObj)
+{
+    u8 z = MapGridGetZCoordAt(mapObj->coords2.x, mapObj->coords2.y);
+    u8 z2 = MapGridGetZCoordAt(mapObj->coords3.x, mapObj->coords3.y);
+
+    if (z == 0xF || z2 == 0xF)
+        return;
+
+    mapObj->mapobj_unk_0B_0 = z;
+
+    if (z != 0 && z != 0xF)
+        mapObj->elevation = z;
+}
+
+void SetObjectSubpriorityByZCoord(u8 a, struct Sprite *sprite, u8 b)
+{
+    s32 tmp = sprite->centerToCornerVecY;
+    u32 tmpa = *(u16 *)&sprite->pos1.y;
+    u32 tmpb = *(u16 *)&gSpriteCoordOffsetY;
+    s32 tmp2 = (tmpa - tmp) + tmpb;
+    u16 tmp3 = (0x10 - ((((u32)tmp2 + 8) & 0xFF) >> 4)) * 2;
+    sprite->subpriority = tmp3 + sUnknown_08376050[a] + b;
+}
+
+void FieldObjectUpdateSubpriority(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    if (mapObj->mapobj_bit_26)
+        return;
+
+    SetObjectSubpriorityByZCoord(mapObj->elevation, sprite, 1);
+}
+
+bool8 AreZCoordsCompatible(u8 a, u8 b)
+{
+    if (a == 0 || b == 0)
+        return TRUE;
+
+    if (a != b)
+        return FALSE;
+
+    return TRUE;
+}
+
+void GroundEffect_SpawnOnTallGrass(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    u8 *ptr;
+
+    gUnknown_0202FF84[0] = mapObj->coords2.x;
+    gUnknown_0202FF84[1] = mapObj->coords2.y;
+    gUnknown_0202FF84[2] = mapObj->elevation;
+    gUnknown_0202FF84[3] = 2;
+    gUnknown_0202FF84[4] = (mapObj->localId << 8) | mapObj->mapNum;
+    gUnknown_0202FF84[5] = mapObj->mapGroup;
+
+    ptr = (u8 *)&gSaveBlock1;
+    gUnknown_0202FF84[6] = ((u8)gSaveBlock1.location.mapNum << 8)
+                         | (u8)gSaveBlock1.location.mapGroup;
+
+    gUnknown_0202FF84[7] = 1;
+    FieldEffectStart(4);
+}
+
+void sub_8063E94(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    u8 *ptr;
+
+    gUnknown_0202FF84[0] = mapObj->coords2.x;
+    gUnknown_0202FF84[1] = mapObj->coords2.y;
+    gUnknown_0202FF84[2] = mapObj->elevation;
+    gUnknown_0202FF84[3] = 2;
+    gUnknown_0202FF84[4] = (mapObj->localId << 8) | mapObj->mapNum;
+    gUnknown_0202FF84[5] = mapObj->mapGroup;
+
+    ptr = (u8 *)&gSaveBlock1;
+    gUnknown_0202FF84[6] = ((u8)gSaveBlock1.location.mapNum << 8)
+                         | (u8)gSaveBlock1.location.mapGroup;
+
+    gUnknown_0202FF84[7] = 0;
+    FieldEffectStart(4);
+}
+
+void sub_8063EE0(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    u8 *ptr;
+
+    gUnknown_0202FF84[0] = mapObj->coords2.x;
+    gUnknown_0202FF84[1] = mapObj->coords2.y;
+    gUnknown_0202FF84[2] = mapObj->elevation;
+    gUnknown_0202FF84[3] = 2;
+    gUnknown_0202FF84[4] = (mapObj->localId << 8) | mapObj->mapNum;
+    gUnknown_0202FF84[5] = mapObj->mapGroup;
+
+    ptr = (u8 *)&gSaveBlock1;
+    gUnknown_0202FF84[6] = ((u8)gSaveBlock1.location.mapNum << 8)
+                         | (u8)gSaveBlock1.location.mapGroup;
+
+    gUnknown_0202FF84[7] = 1;
+    FieldEffectStart(17);
+}
+
+void sub_8063F2C(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    u8 *ptr;
+
+    gUnknown_0202FF84[0] = mapObj->coords2.x;
+    gUnknown_0202FF84[1] = mapObj->coords2.y;
+    gUnknown_0202FF84[2] = mapObj->elevation;
+    gUnknown_0202FF84[3] = 2;
+    gUnknown_0202FF84[4] = (mapObj->localId << 8) | mapObj->mapNum;
+    gUnknown_0202FF84[5] = mapObj->mapGroup;
+
+    ptr = (u8 *)&gSaveBlock1;
+    gUnknown_0202FF84[6] = ((u8)gSaveBlock1.location.mapNum << 8)
+                         | (u8)gSaveBlock1.location.mapGroup;
+
+    gUnknown_0202FF84[7] = 0;
+    FieldEffectStart(17);
+}
+
+void GroundEffect_WaterReflection(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    SetUpReflection(mapObj, sprite, 0);
+}
+
+void GroundEffect_IceReflection(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    SetUpReflection(mapObj, sprite, 1);
+}
+
+void GroundEffect_FlowingWater(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    oe_exec_and_other_stuff(FLDEFF_FEET_IN_FLOWING_WATER, mapObj);
+}
+
+static void (*const gUnknown_08376080[])(struct MapObject *mapObj, struct Sprite *sprite, u8 a) = {
+    nullsub, DoTracksGroundEffect_Footprints, DoTracksGroundEffect_BikeTireTracks,
+};
+
+void sub_8063FA0(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    const struct MapObjectGraphicsInfo *info = GetFieldObjectGraphicsInfo(mapObj->graphicsId);
+    gUnknown_08376080[info->tracks](mapObj, sprite, 0);
+}
+
+void sub_8063FCC(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    const struct MapObjectGraphicsInfo *info = GetFieldObjectGraphicsInfo(mapObj->graphicsId);
+    gUnknown_08376080[info->tracks](mapObj, sprite, 1);
+}
+
+static void nullsub(struct MapObject *mapObj, struct Sprite *sprite, u8 a)
+{
+}
+
+static void DoTracksGroundEffect_Footprints(struct MapObject *mapObj, struct Sprite *sprite, u8 a)
+{
+    // First half-word is a Field Effect script id. (gFieldEffectScriptPointers)
+    u16 sandFootprints_FieldEffectData[2] = { 0xD, 0x18 };
+
+    gUnknown_0202FF84[0] = mapObj->coords3.x;
+    gUnknown_0202FF84[1] = mapObj->coords3.y;
+    gUnknown_0202FF84[2] = 149;
+    gUnknown_0202FF84[3] = 2;
+    gUnknown_0202FF84[4] = mapObj->mapobj_unk_18;
+    FieldEffectStart(sandFootprints_FieldEffectData[a]);
+}
+
+static void DoTracksGroundEffect_BikeTireTracks(
+    struct MapObject *mapObj, struct Sprite *sprite, u8 a)
+{
+    //  Specifies which bike track shape to show next.
+    //  For example, when the bike turns from up to right, it will show
+    //  a track that curves to the right.
+    //  Each 4-byte row corresponds to the initial direction of the bike, and
+    //  each byte in that row is for the next direction of the bike in the order
+    //  of down, up, left, right.
+    static const u8 bikeTireTracks_Transitions[4][4] = {
+        1, 2, 7, 8,
+        1, 2, 6, 5,
+        5, 8, 3, 4,
+        6, 7, 3, 4,
+    };
+
+    if (mapObj->coords2.x != mapObj->coords3.x || mapObj->coords2.y != mapObj->coords3.y)
+    {
+        gUnknown_0202FF84[0] = mapObj->coords3.x;
+        gUnknown_0202FF84[1] = mapObj->coords3.y;
+        gUnknown_0202FF84[2] = 149;
+        gUnknown_0202FF84[3] = 2;
+        gUnknown_0202FF84[4] =
+            bikeTireTracks_Transitions[mapObj->mapobj_unk_20][mapObj->mapobj_unk_18 - 5];
+        FieldEffectStart(FLDEFF_BIKE_TIRE_TRACKS);
+    }
+}
+
+void GroundEffect_Ripple(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    DoRippleFieldEffect(mapObj, sprite);
+}
+
+void GroundEffect_StepOnPuddle(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    oe_exec_and_other_stuff(FLDEFF_SPLASH, mapObj);
+}
+
+void GroundEffect_SandPile(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    oe_exec_and_other_stuff(FLDEFF_SAND_PILE, mapObj);
+}
+
+void GroundEffect_JumpOnTallGrass(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    u8 spriteId;
+
+    gUnknown_0202FF84[0] = mapObj->coords2.x;
+    gUnknown_0202FF84[1] = mapObj->coords2.y;
+    gUnknown_0202FF84[2] = mapObj->elevation;
+    gUnknown_0202FF84[3] = 2;
+    FieldEffectStart(FLDEFF_JUMP_TALL_GRASS);
+
+    spriteId = sub_8126FF0(
+        mapObj->localId, mapObj->mapNum, mapObj->mapGroup, mapObj->coords2.x, mapObj->coords2.y);
+
+    if (spriteId == MAX_SPRITES)
+        GroundEffect_SpawnOnTallGrass(mapObj, sprite);
+}
+
+void GroundEffect_JumpOnLongGrass(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    gUnknown_0202FF84[0] = mapObj->coords2.x;
+    gUnknown_0202FF84[1] = mapObj->coords2.y;
+    gUnknown_0202FF84[2] = mapObj->elevation;
+    gUnknown_0202FF84[3] = 2;
+    FieldEffectStart(FLDEFF_JUMP_LONG_GRASS);
+}
+
+void GroundEffect_JumpOnShallowWater(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    gUnknown_0202FF84[0] = mapObj->coords2.x;
+    gUnknown_0202FF84[1] = mapObj->coords2.y;
+    gUnknown_0202FF84[2] = mapObj->elevation;
+    gUnknown_0202FF84[3] = sprite->oam.priority;
+    FieldEffectStart(FLDEFF_JUMP_SMALL_SPLASH);
+}
+
+void GroundEffect_JumpOnWater(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    gUnknown_0202FF84[0] = mapObj->coords2.x;
+    gUnknown_0202FF84[1] = mapObj->coords2.y;
+    gUnknown_0202FF84[2] = mapObj->elevation;
+    gUnknown_0202FF84[3] = sprite->oam.priority;
+    FieldEffectStart(FLDEFF_JUMP_BIG_SPLASH);
+}
+
+void GroundEffect_JumpLandingDust(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    gUnknown_0202FF84[0] = mapObj->coords2.x;
+    gUnknown_0202FF84[1] = mapObj->coords2.y;
+    gUnknown_0202FF84[2] = mapObj->elevation;
+    gUnknown_0202FF84[3] = sprite->oam.priority;
+    FieldEffectStart(FLDEFF_DUST);
+}
+
+void GroundEffect_ShortGrass(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    oe_exec_and_other_stuff(FLDEFF_SHORT_GRASS, mapObj);
+}
+
+void GroundEffect_HotSprings(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    oe_exec_and_other_stuff(FLDEFF_HOT_SPRINGS_WATER, mapObj);
+}
+
+void GroundEffect_Seaweed(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    gUnknown_0202FF84[0] = mapObj->coords2.x;
+    gUnknown_0202FF84[1] = mapObj->coords2.y;
+    FieldEffectStart(FLDEFF_BUBBLES);
+}
+
+static void (*const gUnknown_083760A0[])(struct MapObject *mapObj, struct Sprite *sprite) = {
+    GroundEffect_SpawnOnTallGrass,
+    sub_8063E94,
+    sub_8063EE0,
+    sub_8063F2C,
+    GroundEffect_WaterReflection,
+    GroundEffect_IceReflection,
+    GroundEffect_FlowingWater,
+    sub_8063FA0,
+    sub_8063FCC,
+    GroundEffect_Ripple,
+    GroundEffect_StepOnPuddle,
+    GroundEffect_SandPile,
+    GroundEffect_JumpOnTallGrass,
+    GroundEffect_JumpOnLongGrass,
+    GroundEffect_JumpOnShallowWater,
+    GroundEffect_JumpOnWater,
+    GroundEffect_JumpLandingDust,
+    GroundEffect_ShortGrass,
+    GroundEffect_HotSprings,
+    GroundEffect_Seaweed
+};
+
+void sub_8064218(struct MapObject *mapObj, struct Sprite *sprite, u32 flags)
+{
+    u8 i;
+    for (i = 0; i < ARRAY_COUNT(gUnknown_083760A0); i++, flags >>= 1)
+        if (flags & 1)
+            gUnknown_083760A0[i](mapObj, sprite);
+}
+
+void filters_out_some_ground_effects(struct MapObject *mapObj, u32 *flags)
+{
+    if (mapObj->mapobj_bit_4)
+    {
+        mapObj->mapobj_bit_18 = 0;
+        mapObj->mapobj_bit_20 = 0;
+        mapObj->mapobj_bit_19 = 0;
+        mapObj->mapobj_bit_21 = 0;
+        *flags &= 0xFFF9F7BD;
+    }
+}
+
+void FilterOutStepOnPuddleGroundEffectIfJumping(struct MapObject *mapObj, u32 *flags)
+{
+    if (mapObj->mapobj_bit_5)
+        *flags &= 0xFFFFFBFF;
+}
+
+void DoGroundEffects_OnSpawn(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    u32 flags;
+
+    if (mapObj->mapobj_bit_2)
+    {
+        flags = 0;
+        FieldObjectUpdateZCoordAndPriority(mapObj, sprite);
+        GetAllGroundEffectFlags_OnSpawn(mapObj, &flags);
+        FieldObjectSetSpriteOamTableForLongGrass(mapObj, sprite);
+        sub_8064218(mapObj, sprite, flags);
+        mapObj->mapobj_bit_2 = 0;
+        mapObj->mapobj_bit_4 = 0;
+    }
+}
+
+void DoGroundEffects_OnBeginStep(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    u32 flags;
+
+    if (mapObj->mapobj_bit_2)
+    {
+        flags = 0;
+        FieldObjectUpdateZCoordAndPriority(mapObj, sprite);
+        GetAllGroundEffectFlags_OnBeginStep(mapObj, &flags);
+        FieldObjectSetSpriteOamTableForLongGrass(mapObj, sprite);
+        filters_out_some_ground_effects(mapObj, &flags);
+        sub_8064218(mapObj, sprite, flags);
+        mapObj->mapobj_bit_2 = 0;
+        mapObj->mapobj_bit_4 = 0;
+    }
+}
+
+void DoGroundEffects_OnFinishStep(struct MapObject *mapObj, struct Sprite *sprite)
+{
+    u32 flags;
+
+    if (mapObj->mapobj_bit_3)
+    {
+        flags = 0;
+        FieldObjectUpdateZCoordAndPriority(mapObj, sprite);
+        GetAllGroundEffectFlags_OnFinishStep(mapObj, &flags);
+        FieldObjectSetSpriteOamTableForLongGrass(mapObj, sprite);
+        FilterOutStepOnPuddleGroundEffectIfJumping(mapObj, &flags);
+        sub_8064218(mapObj, sprite, flags);
+        mapObj->mapobj_bit_3 = 0;
+        mapObj->mapobj_bit_5 = 0;
+    }
+}