diff --git a/asm/battle_transition.s b/asm/battle_transition.s
index 9709fb54f..6406a3f24 100644
--- a/asm/battle_transition.s
+++ b/asm/battle_transition.s
@@ -2151,7 +2151,7 @@ sub_8147018: @ 8147018
 	ands r5, r0
 	movs r1, 0
 	mov r8, r4
-	ldr r6, =gUnknown_02038C08
+	ldr r6, =gFieldEffectSpawnParams
 _08147046:
 	lsls r5, 16
 	asrs r5, 16
@@ -2221,7 +2221,7 @@ _081470C4:
 sub_81470D0: @ 81470D0
 	push {r4,r5,lr}
 	ldr r0, =gUnknown_085C8E68
-	ldr r5, =gUnknown_02038C08
+	ldr r5, =gFieldEffectSpawnParams
 	movs r2, 0
 	ldrsh r1, [r5, r2]
 	movs r3, 0x4
diff --git a/asm/braille_puzzles.s b/asm/braille_puzzles.s
index ceaddbdf0..095b1b793 100644
--- a/asm/braille_puzzles.s
+++ b/asm/braille_puzzles.s
@@ -271,7 +271,7 @@ _0817982E:
 sub_8179834: @ 8179834
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -367,7 +367,7 @@ _08179912:
 sub_8179918: @ 8179918
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
diff --git a/asm/field_effect.s b/asm/field_effect.s
index 6277c127b..08670f556 100644
--- a/asm/field_effect.s
+++ b/asm/field_effect.s
@@ -1989,7 +1989,7 @@ task00_8084310: @ 80B6A24
 	cmp r0, 0
 	beq _080B6A8A
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -3111,7 +3111,7 @@ oei_waterfall: @ 80B734C
 	adds r1, r0
 	lsls r1, 3
 	adds r1, r2
-	ldr r2, =gUnknown_02038C08
+	ldr r2, =gFieldEffectSpawnParams
 	ldr r2, [r2]
 	strh r2, [r1, 0xA]
 	bl _call_via_r4
@@ -3188,7 +3188,7 @@ waterfall_1_do_anim_probably: @ 80B73F0
 	bne _080B7420
 	adds r0, r5, 0
 	bl FieldObjectClearAnimIfSpecialAnimFinished
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r2, 0xA
 	ldrsh r0, [r4, r2]
 	str r0, [r1]
@@ -3304,7 +3304,7 @@ sub_80B74D0: @ 80B74D0
 	adds r1, r0
 	lsls r1, 3
 	adds r1, r2
-	ldr r3, =gUnknown_02038C08
+	ldr r3, =gFieldEffectSpawnParams
 	ldr r2, [r3]
 	strh r2, [r1, 0x26]
 	ldr r2, [r3, 0x4]
@@ -3363,7 +3363,7 @@ dive_2_unknown: @ 80B7558
 	push {r4,lr}
 	adds r4, r0, 0
 	bl ScriptContext2_Enable
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r2, 0x26
 	ldrsh r0, [r4, r2]
 	str r0, [r1]
@@ -3536,7 +3536,7 @@ sub_80B76B8: @ 80B76B8
 	strh r0, [r2, 0x26]
 	movs r0, 0x1
 	strh r0, [r4, 0xE]
-	ldr r3, =gUnknown_02038C08
+	ldr r3, =gFieldEffectSpawnParams
 	movs r5, 0x10
 	ldrsh r0, [r1, r5]
 	str r0, [r3]
@@ -3835,7 +3835,7 @@ sub_80B791C: @ 80B791C
 	lsls r0, 24
 	cmp r0, 0
 	beq _080B795C
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r2, 0x10
 	ldrsh r0, [r5, r2]
 	str r0, [r1]
@@ -3935,7 +3935,7 @@ _080B79E6:
 	thumb_func_start sub_80B79F4
 sub_80B79F4: @ 80B79F4
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -4090,7 +4090,7 @@ sub_80B7B18: @ 80B7B18
 	ldrsh r0, [r5, r2]
 	cmp r0, 0x3
 	ble _080B7B6C
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r2, 0x10
 	ldrsh r0, [r4, r2]
 	str r0, [r1]
@@ -4222,7 +4222,7 @@ _080B7C2C:
 	thumb_func_start sub_80B7C48
 sub_80B7C48: @ 80B7C48
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -5229,7 +5229,7 @@ _080B84BE:
 	bl CreateTask
 	lsls r0, 24
 	lsrs r4, r0, 24
-	ldr r2, =gUnknown_02038C08
+	ldr r2, =gFieldEffectSpawnParams
 	ldr r0, [r2]
 	ldr r1, [r2, 0x4]
 	ldr r2, [r2, 0x8]
@@ -5252,7 +5252,7 @@ _080B84BE:
 	thumb_func_start sub_80B84F8
 sub_80B84F8: @ 80B84F8
 	push {r4-r6,lr}
-	ldr r5, =gUnknown_02038C08
+	ldr r5, =gFieldEffectSpawnParams
 	ldr r0, [r5]
 	movs r6, 0x80
 	lsls r6, 24
@@ -6292,7 +6292,7 @@ sub_80B8D44: @ 80B8D44
 	adds r1, r0
 	lsls r1, 3
 	adds r1, r2
-	ldr r0, =gUnknown_02038C08
+	ldr r0, =gFieldEffectSpawnParams
 	ldr r0, [r0]
 	strh r0, [r1, 0x26]
 	bl sav1_reset_battle_music_maybe
@@ -6421,7 +6421,7 @@ sub_80B8E60: @ 80B8E60
 	lsls r0, 24
 	cmp r0, 0
 	beq _080B8E96
-	ldr r2, =gUnknown_02038C08
+	ldr r2, =gFieldEffectSpawnParams
 	movs r1, 0x26
 	ldrsh r0, [r4, r1]
 	movs r1, 0x80
@@ -6473,7 +6473,7 @@ sub_80B8EA8: @ 80B8EA8
 	lsrs r1, 24
 	adds r0, r4, 0
 	bl FieldObjectSetSpecialAnim
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r2, 0xA
 	ldrsh r0, [r6, r2]
 	str r0, [r1]
@@ -6704,7 +6704,7 @@ sub_80B90CC: @ 80B90CC
 	strb r0, [r2, 0x5]
 	ldr r0, =sub_80B9128
 	str r0, [r2, 0x1C]
-	ldr r0, =gUnknown_02038C08
+	ldr r0, =gFieldEffectSpawnParams
 	ldr r0, [r0]
 	strh r0, [r2, 0x30]
 	movs r0, 0x9E
@@ -6793,7 +6793,7 @@ sub_80B91A4: @ 80B91A4
 	adds r1, r0
 	lsls r1, 3
 	adds r1, r2
-	ldr r0, =gUnknown_02038C08
+	ldr r0, =gFieldEffectSpawnParams
 	ldr r0, [r0]
 	strh r0, [r1, 0xA]
 	movs r0, 0
@@ -6884,7 +6884,7 @@ sub_80B925C: @ 80B925C
 	ldrh r0, [r4, 0x8]
 	adds r0, 0x1
 	strh r0, [r4, 0x8]
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r2, 0xA
 	ldrsh r0, [r4, r2]
 	str r0, [r1]
@@ -7922,7 +7922,7 @@ _080B9ACA:
 sub_80B9ADC: @ 80B9ADC
 	push {r4,lr}
 	sub sp, 0x4
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	ldrb r0, [r4]
 	ldrb r1, [r4, 0x4]
 	ldrb r2, [r4, 0x8]
@@ -8343,7 +8343,7 @@ _080B9E24:
 sub_80B9E28: @ 80B9E28
 	push {r4-r7,lr}
 	sub sp, 0x4
-	ldr r7, =gUnknown_02038C08
+	ldr r7, =gFieldEffectSpawnParams
 	ldrb r0, [r7]
 	ldrb r1, [r7, 0x4]
 	ldrb r2, [r7, 0x8]
diff --git a/asm/field_effect_helpers.s b/asm/field_effect_helpers.s
index 04307fde5..76ba35fd2 100644
--- a/asm/field_effect_helpers.s
+++ b/asm/field_effect_helpers.s
@@ -574,7 +574,7 @@ _0815432E:
 	thumb_func_start oei_shadow
 oei_shadow: @ 8154340
 	push {r4,r5,lr}
-	ldr r5, =gUnknown_02038C08
+	ldr r5, =gFieldEffectSpawnParams
 	ldrb r0, [r5]
 	ldrb r1, [r5, 0x4]
 	ldrb r2, [r5, 0x8]
@@ -742,7 +742,7 @@ _08154498:
 oei_grass_normal: @ 81544AC
 	push {r4,r5,lr}
 	sub sp, 0x4
-	ldr r5, =gUnknown_02038C08
+	ldr r5, =gFieldEffectSpawnParams
 	ldrh r1, [r5]
 	mov r0, sp
 	strh r1, [r0]
@@ -951,7 +951,7 @@ _08154648:
 	thumb_func_start sub_8154658
 sub_8154658: @ 8154658
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -1080,7 +1080,7 @@ _0815474C:
 sub_8154758: @ 8154758
 	push {r4,r5,lr}
 	sub sp, 0x4
-	ldr r5, =gUnknown_02038C08
+	ldr r5, =gFieldEffectSpawnParams
 	ldrh r1, [r5]
 	mov r0, sp
 	strh r1, [r0]
@@ -1282,7 +1282,7 @@ _081548EA:
 	thumb_func_start sub_81548FC
 sub_81548FC: @ 81548FC
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -1336,7 +1336,7 @@ _08154958:
 	thumb_func_start sub_815496C
 sub_815496C: @ 815496C
 	push {r4-r6,lr}
-	ldr r6, =gUnknown_02038C08
+	ldr r6, =gFieldEffectSpawnParams
 	ldrb r0, [r6]
 	ldrb r1, [r6, 0x4]
 	ldrb r2, [r6, 0x8]
@@ -1537,7 +1537,7 @@ _08154AF2:
 	thumb_func_start sub_8154B04
 sub_8154B04: @ 8154B04
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -1591,7 +1591,7 @@ _08154B62:
 	thumb_func_start sub_8154B78
 sub_8154B78: @ 8154B78
 	push {r4,r5,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -1646,7 +1646,7 @@ _08154BD8:
 	thumb_func_start sub_8154BEC
 sub_8154BEC: @ 8154BEC
 	push {r4,r5,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -1777,7 +1777,7 @@ _08154CE4:
 	thumb_func_start sub_8154CEC
 sub_8154CEC: @ 8154CEC
 	push {r4-r6,lr}
-	ldr r6, =gUnknown_02038C08
+	ldr r6, =gFieldEffectSpawnParams
 	ldrb r0, [r6]
 	ldrb r1, [r6, 0x4]
 	ldrb r2, [r6, 0x8]
@@ -1922,7 +1922,7 @@ _08154E0A:
 	thumb_func_start sub_8154E1C
 sub_8154E1C: @ 8154E1C
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -1976,7 +1976,7 @@ _08154E78:
 	thumb_func_start oei_water_drop_tall
 oei_water_drop_tall: @ 8154E8C
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -2030,7 +2030,7 @@ _08154EE8:
 	thumb_func_start sub_8154EFC
 sub_8154EFC: @ 8154EFC
 	push {r4-r7,lr}
-	ldr r7, =gUnknown_02038C08
+	ldr r7, =gFieldEffectSpawnParams
 	ldrb r0, [r7]
 	ldrb r1, [r7, 0x4]
 	ldrb r2, [r7, 0x8]
@@ -2193,7 +2193,7 @@ oei_ripples: @ 8155054
 	push {r4,lr}
 	ldr r0, =gFieldEffectObjectTemplatePointers
 	ldr r0, [r0, 0x14]
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	movs r2, 0
 	ldrsh r1, [r4, r2]
 	movs r3, 0x4
@@ -2238,7 +2238,7 @@ _081550A0:
 	thumb_func_start sub_81550B4
 sub_81550B4: @ 81550B4
 	push {r4-r6,lr}
-	ldr r6, =gUnknown_02038C08
+	ldr r6, =gFieldEffectSpawnParams
 	ldrb r0, [r6]
 	ldrb r1, [r6, 0x4]
 	ldrb r2, [r6, 0x8]
@@ -2393,7 +2393,7 @@ _081551E4:
 	thumb_func_start sub_81551F0
 sub_81551F0: @ 81551F0
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -2445,7 +2445,7 @@ _08155248:
 	thumb_func_start sub_815525C
 sub_815525C: @ 815525C
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -2497,7 +2497,7 @@ _081552B4:
 	thumb_func_start sub_81552C8
 sub_81552C8: @ 81552C8
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -2549,7 +2549,7 @@ _08155320:
 	thumb_func_start sub_8155334
 sub_8155334: @ 8155334
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -2603,7 +2603,7 @@ ash: @ 81553A0
 	push {r4,lr}
 	lsls r2, 16
 	lsrs r2, 16
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	lsls r0, 16
 	asrs r0, 16
 	str r0, [r4]
@@ -2630,7 +2630,7 @@ ash: @ 81553A0
 oei_ash: @ 81553D4
 	push {r4,r5,lr}
 	sub sp, 0x4
-	ldr r5, =gUnknown_02038C08
+	ldr r5, =gFieldEffectSpawnParams
 	ldrh r1, [r5]
 	mov r0, sp
 	strh r1, [r0]
@@ -2809,7 +2809,7 @@ _0815552C:
 	thumb_func_start sub_8155534
 sub_8155534: @ 8155534
 	push {r4,r5,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -3261,7 +3261,7 @@ _08155888:
 	thumb_func_start sub_8155890
 sub_8155890: @ 8155890
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -3315,7 +3315,7 @@ _081558EC:
 	thumb_func_start sub_8155900
 sub_8155900: @ 8155900
 	push {r4-r7,lr}
-	ldr r7, =gUnknown_02038C08
+	ldr r7, =gFieldEffectSpawnParams
 	ldrb r0, [r7]
 	ldrb r1, [r7, 0x4]
 	ldrb r2, [r7, 0x8]
@@ -3505,7 +3505,7 @@ _08155A76:
 	thumb_func_start sub_8155A88
 sub_8155A88: @ 8155A88
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -3586,7 +3586,7 @@ _08155B20:
 	thumb_func_start sub_8155B2C
 sub_8155B2C: @ 8155B2C
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	adds r1, r4, 0x4
 	adds r0, r4, 0
 	movs r2, 0x8
@@ -3689,7 +3689,7 @@ ShowDisguiseFieldEffect: @ 8155BD0
 	lsrs r6, r1, 24
 	lsls r2, 24
 	lsrs r7, r2, 24
-	ldr r5, =gUnknown_02038C08
+	ldr r5, =gFieldEffectSpawnParams
 	ldrb r0, [r5]
 	ldrb r1, [r5, 0x4]
 	ldrb r2, [r5, 0x8]
@@ -3950,7 +3950,7 @@ _08155DD8:
 	thumb_func_start sub_8155DDC
 sub_8155DDC: @ 8155DDC
 	push {r4,lr}
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	ldr r0, [r4]
 	adds r0, 0x7
 	str r0, [r4]
diff --git a/asm/field_ground_effect.s b/asm/field_ground_effect.s
index e4c6631d4..7d05dbd98 100644
--- a/asm/field_ground_effect.s
+++ b/asm/field_ground_effect.s
@@ -1166,7 +1166,7 @@ _08096E8C:
 @ void GroundEffect_SpawnOnTallGrass(struct npc_state *fieldObject, struct obj *object)
 GroundEffect_SpawnOnTallGrass: @ 8096E90
 	push {lr}
-	ldr r3, =gUnknown_02038C08
+	ldr r3, =gFieldEffectSpawnParams
 	movs r2, 0x10
 	ldrsh r1, [r0, r2]
 	str r1, [r3]
@@ -1205,7 +1205,7 @@ GroundEffect_SpawnOnTallGrass: @ 8096E90
 @ void GroundEffect_StepOnTallGrass(struct npc_state *fieldObject, struct obj *object)
 GroundEffect_StepOnTallGrass: @ 8096EDC
 	push {lr}
-	ldr r3, =gUnknown_02038C08
+	ldr r3, =gFieldEffectSpawnParams
 	movs r2, 0x10
 	ldrsh r1, [r0, r2]
 	str r1, [r3]
@@ -1244,7 +1244,7 @@ GroundEffect_StepOnTallGrass: @ 8096EDC
 @ void GroundEffect_SpawnOnLongGrass(struct npc_state *fieldObject, struct obj *object)
 GroundEffect_SpawnOnLongGrass: @ 8096F28
 	push {lr}
-	ldr r3, =gUnknown_02038C08
+	ldr r3, =gFieldEffectSpawnParams
 	movs r2, 0x10
 	ldrsh r1, [r0, r2]
 	str r1, [r3]
@@ -1283,7 +1283,7 @@ GroundEffect_SpawnOnLongGrass: @ 8096F28
 @ void GroundEffect_StepOnLongGrass(struct npc_state *fieldObject, struct obj *object)
 GroundEffect_StepOnLongGrass: @ 8096F74
 	push {lr}
-	ldr r3, =gUnknown_02038C08
+	ldr r3, =gFieldEffectSpawnParams
 	movs r2, 0x10
 	ldrsh r1, [r0, r2]
 	str r1, [r3]
@@ -1413,7 +1413,7 @@ DoTracksGroundEffect_Footprints: @ 8097044
 	mov r0, sp
 	movs r2, 0x4
 	bl memcpy
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r2, 0x14
 	ldrsh r0, [r5, r2]
 	str r0, [r1]
@@ -1449,7 +1449,7 @@ DoTracksGroundEffect_BikeTireTracks: @ 8097094
 	ldr r0, [r4, 0x14]
 	cmp r1, r0
 	beq _080970D6
-	ldr r2, =gUnknown_02038C08
+	ldr r2, =gFieldEffectSpawnParams
 	movs r1, 0x14
 	ldrsh r0, [r4, r1]
 	str r0, [r2]
@@ -1520,7 +1520,7 @@ GroundEffect_JumpOnTallGrass: @ 8097110
 	sub sp, 0x4
 	adds r5, r0, 0
 	adds r6, r1, 0
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r2, 0x10
 	ldrsh r0, [r5, r2]
 	str r0, [r1]
@@ -1562,7 +1562,7 @@ _0809715A:
 @ void GroundEffect_JumpOnLongGrass(struct npc_state *fieldObject, struct obj *object)
 GroundEffect_JumpOnLongGrass: @ 8097168
 	push {lr}
-	ldr r2, =gUnknown_02038C08
+	ldr r2, =gFieldEffectSpawnParams
 	movs r3, 0x10
 	ldrsh r1, [r0, r3]
 	str r1, [r2]
@@ -1585,7 +1585,7 @@ GroundEffect_JumpOnLongGrass: @ 8097168
 @ void GroundEffect_JumpOnShallowWater(struct npc_state *fieldObject, struct obj *object)
 GroundEffect_JumpOnShallowWater: @ 8097190
 	push {r4,lr}
-	ldr r3, =gUnknown_02038C08
+	ldr r3, =gFieldEffectSpawnParams
 	movs r4, 0x10
 	ldrsh r2, [r0, r4]
 	str r2, [r3]
@@ -1611,7 +1611,7 @@ GroundEffect_JumpOnShallowWater: @ 8097190
 @ void GroundEffect_JumpOnWater(struct npc_state *fieldObject, struct obj *object)
 GroundEffect_JumpOnWater: @ 80971C0
 	push {r4,lr}
-	ldr r3, =gUnknown_02038C08
+	ldr r3, =gFieldEffectSpawnParams
 	movs r4, 0x10
 	ldrsh r2, [r0, r4]
 	str r2, [r3]
@@ -1637,7 +1637,7 @@ GroundEffect_JumpOnWater: @ 80971C0
 @ void GroundEffect_JumpLandingDust(struct npc_state *fieldObject, struct obj *object)
 GroundEffect_JumpLandingDust: @ 80971F0
 	push {r4,lr}
-	ldr r3, =gUnknown_02038C08
+	ldr r3, =gFieldEffectSpawnParams
 	movs r4, 0x10
 	ldrsh r2, [r0, r4]
 	str r2, [r3]
@@ -1685,7 +1685,7 @@ GroundEffect_HotSprings: @ 8097230
 @ void GroundEffect_Seaweed(struct npc_state *fieldObject, struct obj *object)
 GroundEffect_Seaweed: @ 8097240
 	push {lr}
-	ldr r2, =gUnknown_02038C08
+	ldr r2, =gFieldEffectSpawnParams
 	movs r3, 0x10
 	ldrsh r1, [r0, r3]
 	str r1, [r2]
diff --git a/asm/field_map_obj.s b/asm/field_map_obj.s
index f67a70ef0..6d2de17b9 100755
--- a/asm/field_map_obj.s
+++ b/asm/field_map_obj.s
@@ -5,304 +5,6 @@
 
 	.text
 
-	thumb_func_start FieldObjectCB_BerryTree
-FieldObjectCB_BerryTree: @ 808FE2C
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	movs r0, 0x2E
-	ldrsh r1, [r4, r0]
-	lsls r0, r1, 3
-	adds r0, r1
-	lsls r0, 2
-	ldr r1, =gMapObjects
-	adds r5, r0, r1
-	ldrh r1, [r4, 0x3C]
-	movs r0, 0x1
-	ands r0, r1
-	cmp r0, 0
-	bne _0808FE58
-	adds r0, r5, 0
-	adds r1, r4, 0
-	bl get_berry_tree_graphics
-	ldrh r1, [r4, 0x3C]
-	movs r0, 0x1
-	orrs r0, r1
-	strh r0, [r4, 0x3C]
-_0808FE58:
-	ldr r2, =FieldObjectCB2_BerryTree
-	adds r0, r5, 0
-	adds r1, r4, 0
-	bl FieldObjectStep
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end FieldObjectCB_BerryTree
-
-	thumb_func_start FieldObjectCB2_BerryTree
-FieldObjectCB2_BerryTree: @ 808FE70
-	push {r4,lr}
-	ldr r3, =gUnknown_0850D7A0
-	movs r4, 0x30
-	ldrsh r2, [r1, r4]
-	lsls r2, 2
-	adds r2, r3
-	ldr r2, [r2]
-	bl _call_via_r2
-	lsls r0, 24
-	lsrs r0, 24
-	pop {r4}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end FieldObjectCB2_BerryTree
-
-	thumb_func_start do_berry_tree_growth_sparkle_1
-@ bool8 do_berry_tree_growth_sparkle_1(struct npc_state *fieldObject, struct obj *object)
-do_berry_tree_growth_sparkle_1: @ 808FE90
-	push {r4-r7,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	bl npc_reset
-	ldrb r0, [r4, 0x1]
-	movs r1, 0x20
-	orrs r0, r1
-	strb r0, [r4, 0x1]
-	adds r6, r5, 0
-	adds r6, 0x3E
-	ldrb r0, [r6]
-	movs r1, 0x4
-	orrs r0, r1
-	strb r0, [r6]
-	ldrb r0, [r4, 0x1D]
-	bl GetStageByBerryTreeId
-	lsls r0, 24
-	lsrs r7, r0, 24
-	cmp r7, 0
-	bne _0808FF00
-	ldrh r1, [r5, 0x3C]
-	movs r0, 0x4
-	ands r0, r1
-	cmp r0, 0
-	bne _0808FEF6
-	subs r6, 0x14
-	ldrb r0, [r6]
-	cmp r0, 0x4
-	bne _0808FEF6
-	ldr r1, =gUnknown_02038C08
-	movs r2, 0x10
-	ldrsh r0, [r4, r2]
-	str r0, [r1]
-	movs r2, 0x12
-	ldrsh r0, [r4, r2]
-	str r0, [r1, 0x4]
-	adds r0, r5, 0
-	adds r0, 0x43
-	ldrb r0, [r0]
-	subs r0, 0x1
-	str r0, [r1, 0x8]
-	ldrb r0, [r5, 0x5]
-	lsls r0, 28
-	lsrs r0, 30
-	str r0, [r1, 0xC]
-	movs r0, 0x17
-	bl FieldEffectStart
-	strb r7, [r6]
-_0808FEF6:
-	movs r0, 0
-	b _0808FF42
-	.pool
-_0808FF00:
-	ldrb r1, [r4, 0x1]
-	movs r0, 0x21
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r4, 0x1]
-	ldrb r1, [r6]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r6]
-	subs r0, r7, 0x1
-	lsls r0, 24
-	lsrs r7, r0, 24
-	adds r0, r5, 0
-	adds r0, 0x2A
-	ldrb r0, [r0]
-	cmp r0, r7
-	bne _0808FF3C
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl get_berry_tree_graphics
-	adds r0, r4, 0
-	adds r1, r5, 0
-	movs r2, 0x39
-	bl FieldObjectSetRegularAnim
-	movs r0, 0x1
-	strh r0, [r5, 0x30]
-	b _0808FF42
-_0808FF3C:
-	movs r0, 0x2
-	strh r0, [r5, 0x30]
-	movs r0, 0x1
-_0808FF42:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end do_berry_tree_growth_sparkle_1
-
-	thumb_func_start sub_808FF48
-@ bool8 sub_808FF48(struct npc_state *fieldObject, struct obj *object)
-sub_808FF48: @ 808FF48
-	push {r4,lr}
-	adds r4, r1, 0
-	bl FieldObjectExecRegularAnim
-	lsls r0, 24
-	cmp r0, 0
-	bne _0808FF5A
-	movs r0, 0
-	b _0808FF60
-_0808FF5A:
-	movs r0, 0
-	strh r0, [r4, 0x30]
-	movs r0, 0x1
-_0808FF60:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_808FF48
-
-	thumb_func_start do_berry_tree_growth_sparkle_2
-@ bool8 do_berry_tree_growth_sparkle_2(struct npc_state *fieldObject, struct obj *object)
-do_berry_tree_growth_sparkle_2: @ 808FF68
-	push {r4,lr}
-	ldrb r2, [r0]
-	movs r3, 0x2
-	orrs r2, r3
-	strb r2, [r0]
-	movs r3, 0
-	movs r2, 0x3
-	strh r2, [r1, 0x30]
-	strh r3, [r1, 0x32]
-	ldrh r3, [r1, 0x3C]
-	movs r2, 0x2
-	orrs r2, r3
-	strh r2, [r1, 0x3C]
-	ldr r3, =gUnknown_02038C08
-	movs r4, 0x10
-	ldrsh r2, [r0, r4]
-	str r2, [r3]
-	movs r2, 0x12
-	ldrsh r0, [r0, r2]
-	str r0, [r3, 0x4]
-	adds r0, r1, 0
-	adds r0, 0x43
-	ldrb r0, [r0]
-	subs r0, 0x1
-	str r0, [r3, 0x8]
-	ldrb r0, [r1, 0x5]
-	lsls r0, 28
-	lsrs r0, 30
-	str r0, [r3, 0xC]
-	movs r0, 0x17
-	bl FieldEffectStart
-	movs r0, 0x1
-	pop {r4}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end do_berry_tree_growth_sparkle_2
-
-	thumb_func_start sub_808FFB4
-@ bool8 sub_808FFB4(struct npc_state *fieldObject, struct obj *object)
-sub_808FFB4: @ 808FFB4
-	push {r4,lr}
-	adds r3, r0, 0
-	adds r4, r1, 0
-	ldrh r1, [r4, 0x32]
-	adds r1, 0x1
-	strh r1, [r4, 0x32]
-	movs r0, 0x2
-	ands r1, r0
-	lsls r1, 16
-	lsrs r1, 17
-	lsls r1, 5
-	ldrb r2, [r3, 0x1]
-	subs r0, 0x23
-	ands r0, r2
-	orrs r0, r1
-	strb r0, [r3, 0x1]
-	adds r2, r4, 0
-	adds r2, 0x2C
-	ldrb r0, [r2]
-	movs r1, 0x40
-	orrs r0, r1
-	strb r0, [r2]
-	movs r1, 0x32
-	ldrsh r0, [r4, r1]
-	cmp r0, 0x40
-	bgt _0808FFEC
-	movs r0, 0
-	b _0808FFFE
-_0808FFEC:
-	adds r0, r3, 0
-	adds r1, r4, 0
-	bl get_berry_tree_graphics
-	movs r0, 0x4
-	strh r0, [r4, 0x30]
-	movs r0, 0
-	strh r0, [r4, 0x32]
-	movs r0, 0x1
-_0808FFFE:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_808FFB4
-
-	thumb_func_start sub_8090004
-@ bool8 sub_8090004(struct npc_state *fieldObject, struct obj *object)
-sub_8090004: @ 8090004
-	push {r4,lr}
-	adds r4, r1, 0
-	ldrh r2, [r4, 0x32]
-	adds r2, 0x1
-	strh r2, [r4, 0x32]
-	movs r1, 0x2
-	ands r2, r1
-	lsls r2, 16
-	lsrs r2, 17
-	lsls r2, 5
-	ldrb r3, [r0, 0x1]
-	subs r1, 0x23
-	ands r1, r3
-	orrs r1, r2
-	strb r1, [r0, 0x1]
-	adds r2, r4, 0
-	adds r2, 0x2C
-	ldrb r0, [r2]
-	movs r1, 0x40
-	orrs r0, r1
-	strb r0, [r2]
-	movs r1, 0x32
-	ldrsh r0, [r4, r1]
-	cmp r0, 0x40
-	bgt _0809003A
-	movs r0, 0
-	b _08090048
-_0809003A:
-	movs r0, 0
-	strh r0, [r4, 0x30]
-	ldrh r1, [r4, 0x3C]
-	subs r0, 0x3
-	ands r0, r1
-	strh r0, [r4, 0x3C]
-	movs r0, 0x1
-_08090048:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8090004
-
 	thumb_func_start FieldObjectCB_RandomlyLookNorthOrSouth
 FieldObjectCB_RandomlyLookNorthOrSouth: @ 8090050
 	push {lr}
@@ -5217,7 +4919,7 @@ FieldObjectCB_TreeDisguise: @ 809253C
 	cmp r0, 0
 	bne _08092584
 _08092564:
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	adds r2, r1, 0x4
 	adds r3, r1, 0
 	adds r3, 0x8
@@ -5280,7 +4982,7 @@ FieldObjectCB_MountainDisguise: @ 80925B8
 	cmp r0, 0
 	bne _08092600
 _080925E0:
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	adds r2, r1, 0x4
 	adds r3, r1, 0
 	adds r3, 0x8
@@ -12012,7 +11714,7 @@ sub_80954CC: @ 80954CC
 do_exclamation_mark_bubble_1: @ 80954DC
 	push {r4,lr}
 	adds r4, r1, 0
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	adds r2, r1, 0x4
 	adds r3, r1, 0
 	adds r3, 0x8
@@ -12031,7 +11733,7 @@ do_exclamation_mark_bubble_1: @ 80954DC
 do_exclamation_mark_bubble_2: @ 8095500
 	push {r4,lr}
 	adds r4, r1, 0
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	adds r2, r1, 0x4
 	adds r3, r1, 0
 	adds r3, 0x8
@@ -12050,7 +11752,7 @@ do_exclamation_mark_bubble_2: @ 8095500
 do_heart_bubble: @ 8095524
 	push {r4,lr}
 	adds r4, r1, 0
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	adds r2, r1, 0x4
 	adds r3, r1, 0
 	adds r3, 0x8
diff --git a/asm/field_player_avatar.s b/asm/field_player_avatar.s
index f21fdacae..3cf5a70da 100644
--- a/asm/field_player_avatar.s
+++ b/asm/field_player_avatar.s
@@ -1522,7 +1522,7 @@ PlayerAvatarTransition_Surfing: @ 808B4D8
 	bl FieldObjectTurn
 	movs r0, 0x8
 	bl SetPlayerAvatarStateMask
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r2, 0x10
 	ldrsh r0, [r4, r2]
 	str r0, [r1]
@@ -3517,7 +3517,7 @@ _0808C3F0:
 	lsrs r1, 24
 	adds r0, r4, 0
 	bl FieldObjectSetSpecialAnim
-	ldr r2, =gUnknown_02038C08
+	ldr r2, =gFieldEffectSpawnParams
 	movs r1, 0x10
 	ldrsh r0, [r4, r1]
 	str r0, [r2]
diff --git a/asm/fldeff_80F9BCC.s b/asm/fldeff_80F9BCC.s
index e332a8841..784da5b1f 100644
--- a/asm/fldeff_80F9BCC.s
+++ b/asm/fldeff_80F9BCC.s
@@ -486,7 +486,7 @@ sub_80F9F78: @ 80F9F78
 	ands r0, r1
 	cmp r0, 0
 	beq _080F9FC0
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	ldr r0, [r1, 0x4]
 	cmp r0, 0x2
 	beq _080F9FAE
@@ -517,7 +517,7 @@ _080F9FB6:
 	movs r0, 0x18
 	b _080F9FFC
 _080F9FC0:
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	ldr r0, [r1, 0x4]
 	cmp r0, 0x2
 	beq _080F9FEA
@@ -643,7 +643,7 @@ _080FA0C4:
 sub_80FA0DC: @ 80FA0DC
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -701,7 +701,7 @@ sub_80FA13C: @ 80FA13C
 	ldrh r1, [r2, 0x2]
 	lsls r1, 23
 	lsrs r1, 23
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	ldr r3, [r4, 0x14]
 	adds r1, r3
 	lsls r1, 16
@@ -778,7 +778,7 @@ sub_80FA1D8: @ 80FA1D8
 sub_80FA1E8: @ 80FA1E8
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -836,13 +836,13 @@ sub_80FA248: @ 80FA248
 	ands r2, r0
 	cmp r2, 0x96
 	bne _080FA26A
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r0, 0
 	str r0, [r1, 0x1C]
 _080FA26A:
 	cmp r2, 0x9C
 	bne _080FA274
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	movs r0, 0x2
 	str r0, [r1, 0x1C]
 _080FA274:
@@ -858,7 +858,7 @@ _080FA274:
 	ldrh r1, [r2, 0x2]
 	lsls r1, 23
 	lsrs r1, 23
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	ldr r3, [r4, 0x14]
 	adds r1, r3
 	lsls r1, 16
@@ -891,7 +891,7 @@ sub_80FA2D8: @ 80FA2D8
 	adds r4, r0, 0
 	movs r0, 0x9B
 	bl PlaySE
-	ldr r0, =gUnknown_02038C08
+	ldr r0, =gFieldEffectSpawnParams
 	ldr r1, [r0, 0x1C]
 	adds r2, r4, 0
 	adds r2, 0x2A
@@ -917,7 +917,7 @@ sub_80FA304: @ 80FA304
 	asrs r0, 16
 	cmp r0, 0x27
 	ble _080FA32E
-	ldr r0, =gUnknown_02038C08
+	ldr r0, =gFieldEffectSpawnParams
 	ldr r0, [r0, 0x1C]
 	cmp r0, 0
 	beq _080FA322
@@ -951,7 +951,7 @@ sub_80FA33C: @ 80FA33C
 sub_80FA34C: @ 80FA34C
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -1009,7 +1009,7 @@ sub_80FA3AC: @ 80FA3AC
 	ldrh r1, [r2, 0x2]
 	lsls r1, 23
 	lsrs r1, 23
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	ldr r3, [r4, 0x14]
 	adds r1, r3
 	lsls r1, 16
@@ -1807,7 +1807,7 @@ sub_80FAA7C: @ 80FAA7C
 	mov r0, sp
 	adds r1, r4, 0
 	bl GetXYCoordsOneStepInFrontOfPlayer
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	mov r0, sp
 	movs r2, 0
 	ldrsh r0, [r0, r2]
@@ -1930,7 +1930,7 @@ door_restore_tilemap: @ 80FABA4
 	adds r5, r0, 0
 	movs r0, 0x83
 	bl PlaySE
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	ldr r0, [r4, 0x14]
 	ldr r1, [r4, 0x18]
 	subs r1, 0x1
@@ -1953,7 +1953,7 @@ _080FABDC:
 	lsls r2, 2
 	bl MapGridSetMetatileIdAt
 _080FABEA:
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	ldr r0, [r4, 0x14]
 	ldr r1, [r4, 0x18]
 	ldr r2, =0x0000020a
@@ -1988,7 +1988,7 @@ sub_80FAC24: @ 80FAC24
 	strh r0, [r5, 0x2E]
 	b _080FAC54
 _080FAC38:
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	ldr r0, [r4, 0x14]
 	ldr r1, [r4, 0x18]
 	ldr r2, =0x00000e8c
diff --git a/asm/fldeff_emotion.s b/asm/fldeff_emotion.s
index dce540074..37096a438 100644
--- a/asm/fldeff_emotion.s
+++ b/asm/fldeff_emotion.s
@@ -115,7 +115,7 @@ sub_80B46D8: @ 80B46D8
 	orrs r3, r4
 	mov r4, r12
 	strb r3, [r4]
-	ldr r4, =gUnknown_02038C08
+	ldr r4, =gFieldEffectSpawnParams
 	ldr r3, [r4]
 	strh r3, [r0, 0x2E]
 	ldr r3, [r4, 0x4]
diff --git a/asm/fldeff_strength.s b/asm/fldeff_strength.s
index 3dc64467e..98764625e 100644
--- a/asm/fldeff_strength.s
+++ b/asm/fldeff_strength.s
@@ -40,7 +40,7 @@ _08145DF2:
 sub_8145E0C: @ 8145E0C
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -66,7 +66,7 @@ sub_8145E2C: @ 8145E2C
 	lsrs r0, r2, 16
 	strh r0, [r1, 0x18]
 	strh r2, [r1, 0x1A]
-	ldr r0, =gUnknown_02038C08
+	ldr r0, =gFieldEffectSpawnParams
 	ldr r1, [r0]
 	movs r0, 0x64
 	muls r0, r1
diff --git a/asm/fldeff_sweetscent.s b/asm/fldeff_sweetscent.s
index a297dd41d..5c83b455d 100644
--- a/asm/fldeff_sweetscent.s
+++ b/asm/fldeff_sweetscent.s
@@ -24,7 +24,7 @@ hm2_sweet_scent: @ 8159F10
 	movs r0, 0x33
 	bl FieldEffectStart
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -217,4 +217,4 @@ _0815A0BE:
 	thumb_func_end sub_815A090
 
 	.align 2, 0 @ Don't pad with nop.
-    
\ No newline at end of file
+    
diff --git a/asm/fldeff_teleport.s b/asm/fldeff_teleport.s
index f3dc3ec9b..e4f4bce42 100644
--- a/asm/fldeff_teleport.s
+++ b/asm/fldeff_teleport.s
@@ -39,7 +39,7 @@ hm_teleport_run_dp02scr: @ 817C8FC
 	movs r0, 0x3F
 	bl FieldEffectStart
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
diff --git a/asm/map_obj_8097404.s b/asm/map_obj_8097404.s
index 1bbf3eff2..4ed8e3bcd 100644
--- a/asm/map_obj_8097404.s
+++ b/asm/map_obj_8097404.s
@@ -1396,7 +1396,7 @@ oe_exec_and_other_stuff: @ 8097DD0
 	adds r0, r1, 0
 	lsls r4, 24
 	lsrs r4, 24
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	adds r2, r1, 0x4
 	adds r3, r1, 0
 	adds r3, 0x8
@@ -1434,7 +1434,7 @@ DoRippleFieldEffect: @ 8097E14
 	adds r4, r1, 0
 	ldrb r0, [r0, 0x5]
 	bl GetFieldObjectGraphicsInfo
-	ldr r2, =gUnknown_02038C08
+	ldr r2, =gFieldEffectSpawnParams
 	movs r3, 0x20
 	ldrsh r1, [r4, r3]
 	str r1, [r2]
diff --git a/asm/rom6.s b/asm/rom6.s
index 18de40366..31d385fa9 100644
--- a/asm/rom6.s
+++ b/asm/rom6.s
@@ -167,7 +167,7 @@ sub_8135578: @ 8135578
 	cmp r4, 0
 	bne _081355FC
 	bl player_get_direction_lower_nybble
-	ldr r6, =gUnknown_02038C08
+	ldr r6, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r6, 0x4]
@@ -303,7 +303,7 @@ _081356AC:
 sub_81356C4: @ 81356C4
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -380,7 +380,7 @@ hm2_dig: @ 8135760
 	movs r0, 0x26
 	bl FieldEffectStart
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -3381,7 +3381,7 @@ hm2_flash: @ 8137178
 	lsls r4, 24
 	lsrs r4, 24
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -11039,7 +11039,7 @@ _0813B0F8:
 	ldr r0, =sub_813B160
 	movs r1, 0x8
 	bl CreateTask
-	ldr r3, =gUnknown_02038C08
+	ldr r3, =gFieldEffectSpawnParams
 	movs r0, 0x1
 	str r0, [r3]
 	movs r0, 0x3A
diff --git a/asm/rom_80C6FA0.s b/asm/rom_80C6FA0.s
index 4c3ada218..d6d3bb375 100644
--- a/asm/rom_80C6FA0.s
+++ b/asm/rom_80C6FA0.s
@@ -24444,7 +24444,7 @@ hm2_ruin_valley: @ 80D3A50
 	movs r0, 0x1
 	bl FieldEffectStart
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -24480,7 +24480,7 @@ sub_80D3A6C: @ 80D3A6C
 sub_80D3A9C: @ 80D3A9C
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
diff --git a/asm/rom_818E9AC.s b/asm/rom_818E9AC.s
index 8363e1308..0ee8404a6 100644
--- a/asm/rom_818E9AC.s
+++ b/asm/rom_818E9AC.s
@@ -74313,7 +74313,7 @@ task_launch_hm_phase_2: @ 81B5750
 	cmp r0, 0x1
 	bne _081B577C
 	bl brm_get_selected_species
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 16
 	lsrs r0, 16
 	str r0, [r1]
@@ -74397,7 +74397,7 @@ _081B57FE:
 hm_surf_run_dp02scr: @ 81B5804
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -74501,7 +74501,7 @@ sub_81B58A8: @ 81B58A8
 hm2_waterfall: @ 81B58D4
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -74561,7 +74561,7 @@ _081B594E:
 sub_81B5958: @ 81B5958
 	push {lr}
 	bl brm_get_pokemon_selection
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1]
@@ -74576,7 +74576,7 @@ sub_81B5958: @ 81B5958
 sub_81B5974: @ 81B5974
 	push {lr}
 	bl sub_809D1E8
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r0, 24
 	lsrs r0, 24
 	str r0, [r1, 0x4]
diff --git a/asm/scrcmd.s b/asm/scrcmd.s
index ccfa0074a..6d531821c 100644
--- a/asm/scrcmd.s
+++ b/asm/scrcmd.s
@@ -4874,7 +4874,7 @@ s9D_set_HM_animation_data: @ 809B7F4
 	lsls r0, 16
 	lsrs r0, 16
 	bl VarGet
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	lsls r4, 2
 	adds r4, r1
 	lsls r0, 16
diff --git a/asm/trainer_see.s b/asm/trainer_see.s
index ac2528cd8..d57ad1815 100644
--- a/asm/trainer_see.s
+++ b/asm/trainer_see.s
@@ -734,7 +734,7 @@ sub_80B417C: @ 80B417C
 	push {r4,r5,lr}
 	adds r5, r1, 0
 	adds r4, r2, 0
-	ldr r1, =gUnknown_02038C08
+	ldr r1, =gFieldEffectSpawnParams
 	adds r2, r1, 0x4
 	adds r3, r1, 0
 	adds r3, 0x8
@@ -1050,7 +1050,7 @@ sub_80B43E0: @ 80B43E0
 	lsls r0, 24
 	cmp r0, 0
 	beq _080B4426
-	ldr r2, =gUnknown_02038C08
+	ldr r2, =gFieldEffectSpawnParams
 	movs r1, 0x10
 	ldrsh r0, [r4, r1]
 	str r0, [r2]
diff --git a/include/field_effect.h b/include/field_effect.h
new file mode 100644
index 000000000..8cf866725
--- /dev/null
+++ b/include/field_effect.h
@@ -0,0 +1,80 @@
+//
+// Created by Scott Norton on 9/15/17.
+//
+
+#ifndef POKEEMERALD_FIELD_EFFECTS_H
+#define POKEEMERALD_FIELD_EFFECTS_H
+
+enum FieldEffectScriptIdx
+{
+    FLDEFF_EXCLAMATION_MARK_ICON_1,
+    FLDEFF_USE_CUT_ON_GRASS,
+    FLDEFF_USE_CUT_ON_TREE,
+    FLDEFF_SHADOW,
+    FLDEFF_TALL_GRASS,
+    FLDEFF_RIPPLE,
+    FLDEFF_FIELD_MOVE_SHOW_MON,
+    FLDEFF_ASH,
+    FLDEFF_SURF_BLOB,
+    FLDEFF_USE_SURF,
+    FLDEFF_DUST,
+    FLDEFF_USE_SECRET_POWER_CAVE,
+    FLDEFF_JUMP_TALL_GRASS,
+    FLDEFF_SAND_FOOTPRINTS,
+    FLDEFF_JUMP_BIG_SPLASH,
+    FLDEFF_SPLASH,
+    FLDEFF_JUMP_SMALL_SPLASH,
+    FLDEFF_LONG_GRASS,
+    FLDEFF_JUMP_LONG_GRASS,
+    FLDEFF_UNKNOWN_19,
+    FLDEFF_UNKNOWN_20,
+    FLDEFF_UNKNOWN_21,
+    FLDEFF_UNKNOWN_22,
+    FLDEFF_BERRY_TREE_GROWTH_SPARKLE,
+    FLDEFF_DEEP_SAND_FOOTPRINTS,
+    FLDEFF_POKECENTER_HEAL,
+    FLDEFF_USE_SECRET_POWER_TREE,
+    FLDEFF_USE_SECRET_POWER_SHRUB,
+    FLDEFF_TREE_DISGUISE,
+    FLDEFF_MOUNTAIN_DISGUISE,
+    FLDEFF_NPCFLY_OUT,
+    FLDEFF_USE_FLY,
+    FLDEFF_FLY_IN,
+    FLDEFF_EXCLAMATION_MARK_ICON_2,
+    FLDEFF_FEET_IN_FLOWING_WATER,
+    FLDEFF_BIKE_TIRE_TRACKS,
+    FLDEFF_SAND_DISGUISE,
+    FLDEFF_USE_ROCK_SMASH,
+    FLDEFF_USE_DIG,
+    FLDEFF_SAND_PILE,
+    FLDEFF_USE_STRENGTH,
+    FLDEFF_SHORT_GRASS,
+    FLDEFF_HOT_SPRINGS_WATER,
+    FLDEFF_USE_WATERFALL,
+    FLDEFF_USE_DIVE,
+    FLDEFF_POKEBALL,
+    FLDEFF_HEART_ICON,
+    FLDEFF_NOP_47,
+    FLDEFF_NOP_48,
+    FLDEFF_POP_OUT_OF_ASH,
+    FLDEFF_LAVARIDGE_GYM_WARP,
+    FLDEFF_SWEET_SCENT,
+    FLDEFF_SAND_PILLAR,
+    FLDEFF_BUBBLES,
+    FLDEFF_SPARKLE,
+    FLDEFF_SECRET_POWER_CAVE,
+    FLDEFF_SECRET_POWER_TREE,
+    FLDEFF_SECRET_POWER_SHRUB,
+    FLDEFF_CUT_GRASS,
+    FLDEFF_FIELD_MOVE_SHOW_MON_INIT,
+    FLDEFF_USE_FLY_ANCIENT_TOMB,
+    FLDEFF_PCTURN_ON,
+    FLDEFF_HALL_OF_FAME_RECORD,
+    FLDEFF_USE_TELEPORT
+};
+
+extern u32 gFieldEffectSpawnParams[8];
+
+u8 FieldEffectStart(u8);
+
+#endif //POKEEMERALD_FIELD_EFFECTS_H
diff --git a/src/field_map_obj.c b/src/field_map_obj.c
index 04b207d96..16a9e5851 100755
--- a/src/field_map_obj.c
+++ b/src/field_map_obj.c
@@ -16,6 +16,7 @@
 #include "field_ground_effect.h"
 #include "map_obj_8097404.h"
 #include "mauville_old_man.h"
+#include "field_effect.h"
 #include "field_effect_helpers.h"
 #include "field_map_obj.h"
 
@@ -1884,7 +1885,7 @@ u8 GetEastWestRunningPastFacingDirection(s16 dx, s16 dy, s16 absdx, s16 absdy)
 u8 GetNorthEastRunningPastFacingDirection(s16 dx, s16 dy, s16 absdx, s16 absdy)
 {
     u8 direction;
-    
+
     direction = GetRegularRunningPastFacingDirection(dx, dy, absdx, absdy);
     if (direction == DIR_SOUTH)
     {
@@ -2272,3 +2273,110 @@ bool8 sub_808FE1C(struct MapObject *mapObject, struct Sprite *sprite)
     mapObject->mapobj_bit_1 = FALSE;
     return FALSE;
 }
+
+static bool8 FieldObjectCB2_BerryTree(struct MapObject *mapObject, struct Sprite *sprite);
+extern bool8 (*const gUnknown_0850D7A0[])(struct MapObject *mapObject, struct Sprite *sprite);
+void FieldObjectCB_BerryTree(struct Sprite *sprite)
+{
+    struct MapObject *mapObject;
+
+    mapObject = &gMapObjects[sprite->data0];
+    if (!(sprite->data7 & 0x0001))
+    {
+        get_berry_tree_graphics(mapObject, sprite);
+        sprite->data7 |= 0x0001;
+    }
+    FieldObjectStep(mapObject, sprite, FieldObjectCB2_BerryTree);
+}
+static bool8 FieldObjectCB2_BerryTree(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    return gUnknown_0850D7A0[sprite->data1](mapObject, sprite);
+}
+
+bool8 do_berry_tree_growth_sparkle_1 (struct MapObject *mapObject, struct Sprite *sprite)
+{
+    u8 berryStage;
+
+    npc_reset(mapObject, sprite);
+    mapObject->mapobj_bit_13 = TRUE;
+    sprite->invisible = TRUE;
+    berryStage = GetStageByBerryTreeId(mapObject->trainerRange_berryTreeId);
+    if (berryStage == 0)
+    {
+        if (!(sprite->data7 & 0x0004) && sprite->animNum == 4)
+        {
+            gFieldEffectSpawnParams[0] = mapObject->coords2.x;
+            gFieldEffectSpawnParams[1] = mapObject->coords2.y;
+            gFieldEffectSpawnParams[2] = sprite->subpriority - 1;
+            gFieldEffectSpawnParams[3] = sprite->oam.priority;
+            FieldEffectStart(FLDEFF_BERRY_TREE_GROWTH_SPARKLE);
+            sprite->animNum = berryStage;
+        }
+        return FALSE;
+    }
+    mapObject->mapobj_bit_13 = FALSE;
+    sprite->invisible = FALSE;
+    berryStage --;
+    if (sprite->animNum != berryStage)
+    {
+        sprite->data1 = 2;
+        return TRUE;
+    }
+    get_berry_tree_graphics(mapObject, sprite);
+    FieldObjectSetRegularAnim(mapObject, sprite, 0x39);
+    sprite->data1 = 1;
+    return TRUE;
+}
+
+bool8 sub_808FF48 (struct MapObject *mapObject, struct Sprite *sprite)
+{
+    if (FieldObjectExecRegularAnim(mapObject, sprite))
+    {
+        sprite->data1 = 0;
+        return TRUE;
+    }
+    return FALSE;
+}
+
+bool8 do_berry_tree_growth_sparkle_2 (struct MapObject *mapObject, struct Sprite *sprite)
+{
+    mapObject->mapobj_bit_1 = TRUE;
+    sprite->data1 = 3;
+    sprite->data2 = 0;
+    sprite->data7 |= 0x0002;
+    gFieldEffectSpawnParams[0] = mapObject->coords2.x;
+    gFieldEffectSpawnParams[1] = mapObject->coords2.y;
+    gFieldEffectSpawnParams[2] = sprite->subpriority - 1;
+    gFieldEffectSpawnParams[3] = sprite->oam.priority;
+    FieldEffectStart(FLDEFF_BERRY_TREE_GROWTH_SPARKLE);
+    return TRUE;
+}
+
+bool8 sub_808FFB4 (struct MapObject *mapObject, struct Sprite *sprite)
+{
+    sprite->data2 ++;
+    mapObject->mapobj_bit_13 = (sprite->data2 & 0x02) >> 1;
+    sprite->animPaused = TRUE;
+    if (sprite->data2 > 64)
+    {
+        get_berry_tree_graphics(mapObject, sprite);
+        sprite->data1 = 4;
+        sprite->data2 = 0;
+        return TRUE;
+    }
+    return FALSE;
+}
+
+bool8 sub_8090004 (struct MapObject *mapObject, struct Sprite *sprite)
+{
+    sprite->data2 ++;
+    mapObject->mapobj_bit_13 = (sprite->data2 & 0x02) >> 1;
+    sprite->animPaused = TRUE;
+    if (sprite->data2 > 64)
+    {
+        sprite->data1 = 0;
+        sprite->data7 &= ~0x0002;
+        return TRUE;
+    }
+    return FALSE;
+}
diff --git a/sym_ewram.txt b/sym_ewram.txt
index b9d1f6650..582518bf3 100644
--- a/sym_ewram.txt
+++ b/sym_ewram.txt
@@ -902,7 +902,7 @@ gUnknown_02038C00: @ 2038C00
 gUnknown_02038C04: @ 2038C04
 	.space 0x4
 
-gUnknown_02038C08: @ 2038C08
+gFieldEffectSpawnParams: @ 2038C08
 	.space 0x20
 
 gUnknown_02038C28: @ 2038C28