diff --git a/asm/ground_sprite.s b/asm/ground_sprite.s
index db21cc1fa..b72e62b27 100644
--- a/asm/ground_sprite.s
+++ b/asm/ground_sprite.s
@@ -7,449 +7,6 @@
 
 
 
-
-	thumb_func_start IsOnscreen_80A675C
-IsOnscreen_80A675C:
-	push {r4-r6,lr}
-	sub sp, 0x8
-	adds r6, r1, 0
-	mov r0, sp
-	bl sub_809D248
-	lsls r0, 24
-	cmp r0, 0
-	beq _080A678C
-	ldr r1, [r6]
-	cmp r1, 0
-	bge _080A6776
-	adds r1, 0xFF
-_080A6776:
-	asrs r1, 8
-	ldr r0, [sp]
-	subs r4, r1, r0
-	ldr r1, [r6, 0x4]
-	cmp r1, 0
-	bge _080A6784
-	adds r1, 0xFF
-_080A6784:
-	asrs r1, 8
-	ldr r0, [sp, 0x4]
-	subs r5, r1, r0
-	b _080A67A0
-_080A678C:
-	ldr r0, [r6]
-	cmp r0, 0
-	bge _080A6794
-	adds r0, 0xFF
-_080A6794:
-	asrs r4, r0, 8
-	ldr r1, [r6, 0x4]
-	cmp r1, 0
-	bge _080A679E
-	adds r1, 0xFF
-_080A679E:
-	asrs r5, r1, 8
-_080A67A0:
-	adds r1, r4, 0
-	adds r1, 0x40
-	ldr r0, _080A67BC
-	cmp r1, r0
-	bhi _080A67C0
-	movs r0, 0x10
-	negs r0, r0
-	cmp r5, r0
-	blt _080A67C0
-	cmp r5, 0xCF
-	bgt _080A67C0
-	movs r0, 0x1
-	b _080A67C2
-	.align 2, 0
-_080A67BC: .4byte 0x0000016f
-_080A67C0:
-	movs r0, 0
-_080A67C2:
-	add sp, 0x8
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	thumb_func_end IsOnscreen_80A675C
-
-	thumb_func_start sub_80A67CC
-sub_80A67CC:
-	push {r4-r7,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	movs r7, 0
-	cmp r5, 0
-	beq _080A67E2
-	movs r1, 0
-	ldrsh r0, [r5, r1]
-	cmp r0, 0
-	ble _080A67E2
-	movs r7, 0x1
-_080A67E2:
-	adds r0, r2, 0
-	bl sub_80A65E0
-	adds r1, r0, 0
-	lsls r1, 16
-	lsrs r1, 16
-	adds r0, r4, 0
-	bl sub_80A65F0
-	movs r1, 0
-	str r1, [r4, 0x74]
-	str r1, [r4, 0x78]
-	movs r6, 0x1
-	negs r6, r6
-	str r6, [r4, 0x7C]
-	adds r0, r4, 0
-	adds r0, 0x70
-	strb r1, [r0]
-	subs r0, 0x4
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	adds r2, r4, 0
-	adds r2, 0x52
-	ldr r0, _080A6884
-	strh r0, [r2]
-	str r1, [r4, 0x54]
-	adds r0, r4, 0
-	adds r0, 0x64
-	strh r1, [r0]
-	adds r2, 0x14
-	adds r0, r6, 0
-	adds r3, r0, 0
-	strh r0, [r2]
-	adds r0, r4, 0
-	adds r0, 0x68
-	strh r1, [r0]
-	subs r0, 0x10
-	strh r1, [r0]
-	adds r1, r4, 0
-	adds r1, 0x5A
-	movs r0, 0xFF
-	strb r0, [r1]
-	str r6, [r4, 0x5C]
-	str r6, [r4, 0x60]
-	cmp r7, 0
-	beq _080A6888
-	ldr r0, [r5]
-	ldr r1, [r5, 0x4]
-	str r0, [r4, 0x48]
-	str r1, [r4, 0x4C]
-	adds r5, r4, 0
-	adds r5, 0x48
-	adds r0, r4, 0
-	adds r1, r5, 0
-	adds r2, r6, 0
-	bl sub_80A68F8
-	lsls r0, 24
-	cmp r0, 0
-	bne _080A689A
-	adds r0, r4, 0
-	adds r0, 0x50
-	ldrh r1, [r0]
-	movs r0, 0x80
-	lsls r0, 5
-	ands r0, r1
-	cmp r0, 0
-	bne _080A689A
-	adds r0, r5, 0
-	bl sub_80A6CF4
-	lsls r0, 24
-	cmp r0, 0
-	beq _080A689A
-	adds r0, r4, 0
-	adds r1, r5, 0
-	adds r2, r6, 0
-	bl sub_80A68F8
-	b _080A689A
-	.align 2, 0
-_080A6884: .4byte 0x0000ffff
-_080A6888:
-	adds r1, r4, 0
-	adds r1, 0x48
-	ldrh r0, [r1]
-	orrs r0, r3
-	strh r0, [r1]
-	adds r0, r4, 0
-	adds r0, 0x4A
-	strh r7, [r0]
-	str r7, [r4, 0x4C]
-_080A689A:
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80A67CC
-
-	thumb_func_start sub_80A68A0
-sub_80A68A0:
-	push {r4,lr}
-	adds r4, r0, 0
-	adds r0, 0x50
-	ldrh r1, [r0]
-	movs r0, 0x80
-	lsls r0, 2
-	ands r0, r1
-	cmp r0, 0
-	beq _080A68CE
-	adds r0, r4, 0
-	adds r0, 0x58
-	movs r1, 0
-	ldrsh r0, [r0, r1]
-	cmp r0, 0
-	beq _080A68CE
-	ldr r1, [r4, 0x5C]
-	movs r0, 0x1
-	negs r0, r0
-	cmp r1, r0
-	beq _080A68CE
-	adds r0, r1, 0
-	bl sub_800DC14
-_080A68CE:
-	ldr r0, [r4, 0x54]
-	cmp r0, 0
-	beq _080A68DC
-	bl CloseFile
-	movs r0, 0
-	str r0, [r4, 0x54]
-_080A68DC:
-	adds r0, r4, 0
-	bl sub_80A69FC
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80A68A0
-
-	thumb_func_start sub_80A68E8
-sub_80A68E8:
-	push {lr}
-	movs r0, 0x15
-_080A68EC:
-	subs r0, 0x1
-	cmp r0, 0
-	bge _080A68EC
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80A68E8
-
-	thumb_func_start sub_80A68F8
-sub_80A68F8:
-	push {r4-r7,lr}
-	mov r12, r0
-	adds r5, r2, 0
-	ldr r0, _080A6924
-	ldr r4, [r0]
-	movs r2, 0
-	ldrsh r0, [r1, r2]
-	cmp r0, r5
-	blt _080A6956
-	adds r5, r0, 0
-	movs r3, 0
-	ldr r0, [r4]
-	mov r6, r12
-	adds r6, 0x52
-	mov r7, r12
-	adds r7, 0x64
-	cmp r0, 0
-	bne _080A6928
-	movs r2, 0x1
-	cmp r2, r5
-	blt _080A692A
-	b _080A6986
-	.align 2, 0
-_080A6924: .4byte gUnknown_3001B7C
-_080A6928:
-	movs r2, 0
-_080A692A:
-	adds r0, r3, 0x1
-	lsls r0, 16
-	asrs r3, r0, 16
-	adds r4, 0xC
-	cmp r3, 0x15
-	bgt _080A6986
-	ldr r0, [r4]
-	cmp r0, 0
-	bne _080A6928
-	adds r2, 0x1
-	cmp r2, r5
-	blt _080A692A
-	lsls r0, r2, 1
-	adds r0, r2
-	lsls r0, 2
-	subs r0, 0xC
-	subs r4, r0
-	adds r0, r3, 0x1
-	subs r0, r2
-	lsls r0, 16
-	asrs r3, r0, 16
-	b _080A6986
-_080A6956:
-	movs r3, 0x15
-	adds r4, 0xFC
-	ldr r0, [r4]
-	mov r6, r12
-	adds r6, 0x52
-	mov r7, r12
-	adds r7, 0x64
-	cmp r0, 0
-	bne _080A696C
-	movs r2, 0x1
-	b _080A6982
-_080A696C:
-	movs r2, 0
-_080A696E:
-	subs r0, r3, 0x1
-	lsls r0, 16
-	asrs r3, r0, 16
-	subs r4, 0xC
-	cmp r3, 0
-	blt _080A6986
-	ldr r0, [r4]
-	cmp r0, 0
-	bne _080A696C
-	adds r2, 0x1
-_080A6982:
-	cmp r2, r5
-	blt _080A696E
-_080A6986:
-	cmp r2, r5
-	blt _080A69C4
-	strh r3, [r6]
-	strh r5, [r7]
-	movs r0, 0x1
-	str r0, [r4]
-	mov r0, r12
-	str r0, [r4, 0x8]
-	ldrh r1, [r1, 0x2]
-	bl GroundSprite_ExtendPaletteAdd
-	cmp r5, 0x1
-	ble _080A69B2
-	movs r2, 0x2
-	adds r0, r4, 0
-	adds r0, 0xC
-	subs r1, r5, 0x1
-_080A69A8:
-	str r2, [r0]
-	adds r0, 0xC
-	subs r1, 0x1
-	cmp r1, 0
-	bne _080A69A8
-_080A69B2:
-	ldr r1, _080A69C0
-	ldr r0, [r1]
-	subs r0, r5
-	str r0, [r1]
-	movs r0, 0x1
-	b _080A69EC
-	.align 2, 0
-_080A69C0: .4byte gUnknown_2039DD4
-_080A69C4:
-	ldr r1, _080A69F4
-	movs r0, 0
-	strb r0, [r1]
-	movs r0, 0x1
-	negs r0, r0
-	mov r1, r12
-	str r0, [r1, 0x7C]
-	mov r0, r12
-	adds r0, 0x70
-	movs r1, 0
-	strb r1, [r0]
-	ldr r0, _080A69F8
-	strh r0, [r6]
-	strh r1, [r7]
-	mov r0, r12
-	adds r0, 0x6C
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	movs r0, 0
-_080A69EC:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_080A69F4: .4byte gUnknown_2039DD0
-_080A69F8: .4byte 0x0000ffff
-	thumb_func_end sub_80A68F8
-
-	thumb_func_start sub_80A69FC
-sub_80A69FC:
-	push {r4-r7,lr}
-	adds r6, r0, 0
-	adds r7, r6, 0
-	adds r7, 0x52
-	movs r0, 0
-	ldrsh r4, [r7, r0]
-	ldr r0, _080A6A80
-	lsls r1, r4, 1
-	adds r1, r4
-	lsls r1, 2
-	ldr r0, [r0]
-	adds r5, r0, r1
-	cmp r4, 0
-	blt _080A6A7A
-	adds r0, r6, 0
-	bl GroundSprite_ExtendPaletteDelete
-	movs r0, 0
-	str r0, [r5, 0x8]
-	str r0, [r5]
-	adds r5, 0xC
-	ldr r1, _080A6A84
-	ldr r0, [r1]
-	adds r0, 0x1
-	str r0, [r1]
-	adds r0, r4, 0x1
-	lsls r0, 16
-	asrs r4, r0, 16
-	adds r6, 0x64
-	mov r12, r6
-	cmp r4, 0x15
-	bgt _080A6A6A
-	ldr r0, [r5]
-	cmp r0, 0x2
-	bne _080A6A6A
-	movs r6, 0
-	adds r2, r1, 0
-	lsls r1, r4, 16
-	movs r0, 0x80
-	lsls r0, 9
-	adds r1, r0
-	adds r3, r0, 0
-_080A6A50:
-	str r6, [r5]
-	adds r5, 0xC
-	ldr r0, [r2]
-	adds r0, 0x1
-	str r0, [r2]
-	adds r0, r1, 0
-	adds r1, r3
-	asrs r4, r0, 16
-	cmp r4, 0x15
-	bgt _080A6A6A
-	ldr r0, [r5]
-	cmp r0, 0x2
-	beq _080A6A50
-_080A6A6A:
-	ldr r0, _080A6A88
-	strh r0, [r7]
-	movs r0, 0
-	mov r1, r12
-	strh r0, [r1]
-	ldr r1, _080A6A8C
-	movs r0, 0x1
-	strb r0, [r1]
-_080A6A7A:
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080A6A80: .4byte gUnknown_3001B7C
-_080A6A84: .4byte gUnknown_2039DD4
-_080A6A88: .4byte 0x0000ffff
-_080A6A8C: .4byte gUnknown_2039DD0
-	thumb_func_end sub_80A69FC
-
 	thumb_func_start GroundSprite_ExtendPaletteAdd
 GroundSprite_ExtendPaletteAdd:
 	push {r4-r7,lr}
diff --git a/include/ground_sprite.h b/include/ground_sprite.h
index fdaf41da7..c83fe64a1 100644
--- a/include/ground_sprite.h
+++ b/include/ground_sprite.h
@@ -1,12 +1,48 @@
 #ifndef GUARD_GROUND_SPRITE_H
 #define GUARD_GROUND_SPRITE_H
 
+#include "structs/sprite_oam.h"
+
+// TODO: Clean up these structs
+
+struct UnkGroundSpriteSubStructx48
+{
+    s16 unk0;
+    u16 unk2;
+    s32 unk4;
+};
+
+struct UnkGroundSpriteStruct
+{
+    u16 unk0;
+    u8 fill2[0x3a];
+    unkStruct_2039DB0 unk3C;
+    struct UnkGroundSpriteSubStructx48 unk48;
+    u16 unk50;
+    s16 unk52;
+    OpenedFile *unk54;
+    s16 unk58;
+    u8 unk5A;
+    s32 unk5C;
+    s32 unk60;
+    u16 unk64;
+    s16 unk66;
+    u16 unk68;
+    u16 unk6A;
+    u16 unk6C;
+    u16 unk6E;
+    u8 unk70;
+    s32 unk74;
+    s32 unk78;
+    s32 unk7C;
+};
+
 // size: 0xC
 typedef struct unkStruct_3001B7C_sub0
 {
     u32 unk0;
     s32 unk4;
-    u32 unk8;
+    struct UnkGroundSpriteStruct *unk8;
 } unkStruct_3001B7C_sub0;
 
 // size: 0x4
@@ -16,13 +52,15 @@ typedef struct unkStruct_3001B7C_sub108
     s16 unk2;
 } unkStruct_3001B7C_sub108;
 
+#define UNK_3001B7C_SUB0_COUNT 22
+
 // size: 0x110
 typedef struct unkStruct_3001B7C
 {
-    unkStruct_3001B7C_sub0 unk0[22];
+    unkStruct_3001B7C_sub0 unk0[UNK_3001B7C_SUB0_COUNT];
     unkStruct_3001B7C_sub108 unk108[2];
 } unkStruct_3001B7C;
 
 void GroundSprite_Reset(s16);
 
-#endif // GUARD_GROUND_SPRITE_H
\ No newline at end of file
+#endif // GUARD_GROUND_SPRITE_H
diff --git a/src/ground_sprite.c b/src/ground_sprite.c
index 0c807d3ae..0a5441833 100644
--- a/src/ground_sprite.c
+++ b/src/ground_sprite.c
@@ -206,23 +206,6 @@ u16 sub_80A65E0(u32 a0)
     return (a0 >> 16) & 0x337F;
 }
 
-// TODO: This struct should probable be merged with an already existing one? Or
-struct UnkGroundSpriteStruct
-{
-    u16 unk0;
-    u8 fill2[0x3a];
-    unkStruct_2039DB0 unk3C;
-    s16 unk48;
-    u8 fill4A[6];
-    u16 unk50;
-    s16 unk52;
-    u8 fill54[4];
-    s16 unk58;
-    u32 unk5C;
-    u8 fill60[0x6a-0x60];
-    u16 unk6A;
-};
-
 void sub_80A65F0(struct UnkGroundSpriteStruct *ptr, u16 a1)
 {
     ptr->unk50 = a1;
@@ -249,7 +232,7 @@ void sub_80A6688(struct UnkGroundSpriteStruct *ptr, s32 a0)
 
 bool8 SpriteHasPokemonSize_80A66A4(struct UnkGroundSpriteStruct *ptr)
 {
-    return (ptr->unk48 > 0);
+    return (ptr->unk48.unk0 > 0);
 }
 
 UNUSED static bool8 sub_80A66BC(struct UnkGroundSpriteStruct *ptr)
@@ -262,7 +245,7 @@ UNUSED static bool8 sub_80A66BC(struct UnkGroundSpriteStruct *ptr)
 
 bool8 sub_80A66D4(struct UnkGroundSpriteStruct *ptr)
 {
-    if (ptr->unk52 < 0 && ptr->unk48 > 0)
+    if (ptr->unk52 < 0 && ptr->unk48.unk0 > 0)
         return TRUE;
     else
         return FALSE;
@@ -290,3 +273,181 @@ bool8 sub_80A671C(struct UnkGroundSpriteStruct *ptr)
     }
     return FALSE;
 }
+
+extern u8 sub_809D248(PixelPos *r0);
+
+bool8 IsOnscreen_80A675C(struct UnkGroundSpriteStruct *ptr, PixelPos *pixPosArg)
+{
+    PixelPos result;
+    PixelPos pixelPos;
+
+    if (sub_809D248(&pixelPos)) {
+        result.x = (pixPosArg->x / 256) - pixelPos.x;
+        result.y = (pixPosArg->y / 256) - pixelPos.y;
+    }
+    else {
+        result.x = (pixPosArg->x / 256);
+        result.y = (pixPosArg->y / 256);
+    }
+
+    if (result.x >= -64 && result.x <= 303 && result.y >= -16 && result.y <= 207) {
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+bool8 sub_80A68F8(struct UnkGroundSpriteStruct *ptr, struct UnkGroundSpriteSubStructx48 *a1, s32 a2);
+bool8 sub_80A6CF4(struct UnkGroundSpriteSubStructx48 *a0);
+void sub_80A69FC(struct UnkGroundSpriteStruct *ptr);
+
+void sub_80A67CC(struct UnkGroundSpriteStruct *ptr, struct UnkGroundSpriteSubStructx48 *a1, s32 a2)
+{
+    bool8 r7;
+
+    if (a1 != NULL && a1->unk0 > 0) {
+        r7 = TRUE;
+    }
+    else {
+        r7 = FALSE;
+    }
+
+    sub_80A65F0(ptr, sub_80A65E0(a2));
+    ptr->unk74 = 0;
+    ptr->unk78 = 0;
+    ptr->unk7C = -1;
+    ptr->unk70 = 0;
+    ptr->unk6C = 0;
+    ptr->unk6E = 0;
+    ptr->unk52 = -1;
+    ptr->unk54 = NULL;
+    ptr->unk64 = 0;
+    ptr->unk66 = -1;
+    ptr->unk68 = 0;
+    ptr->unk58 = 0;
+    ptr->unk5A = 0xFF;
+    ptr->unk5C = -1;
+    ptr->unk60 = -1;
+    if (r7) {
+        ptr->unk48 = *a1;
+        if (!sub_80A68F8(ptr, &ptr->unk48, -1) && !(ptr->unk50 & 0x1000) && sub_80A6CF4(&ptr->unk48)) {
+            sub_80A68F8(ptr, &ptr->unk48, -1);
+        }
+    }
+    else {
+        ptr->unk48.unk0 = -1;
+        ptr->unk48.unk2 = 0;
+        ptr->unk48.unk4 = 0;
+    }
+}
+
+void sub_80A68A0(struct UnkGroundSpriteStruct *ptr)
+{
+    if ((ptr->unk50 & 0x200) && ptr->unk58 != 0 && ptr->unk5C != -1) {
+        sub_800DC14(ptr->unk5C);
+    }
+    if (ptr->unk54 != NULL) {
+        CloseFile(ptr->unk54);
+        ptr->unk54 = NULL;
+    }
+    sub_80A69FC(ptr);
+}
+
+// I guess the code inside the loop was commented out or under an ifdef.
+UNUSED static void sub_80A68E8(void)
+{
+    s32 i;
+    for (i = 0; i < UNK_3001B7C_SUB0_COUNT; i++) {
+        ;
+    }
+}
+
+void GroundSprite_ExtendPaletteAdd(struct UnkGroundSpriteStruct *ptr, u16);
+void GroundSprite_ExtendPaletteDelete(struct UnkGroundSpriteStruct *ptr);
+
+bool8 sub_80A68F8(struct UnkGroundSpriteStruct *ptr, struct UnkGroundSpriteSubStructx48 *a1, s32 a2)
+{
+    s32 id, count;
+    unkStruct_3001B7C_sub0 *unkPtr = &gUnknown_3001B7C->unk0[0];
+
+    if (a1->unk0 >= a2) {
+        a2 = a1->unk0;
+        count = 0;
+        for (id = 0; id < UNK_3001B7C_SUB0_COUNT; id = (s16)(id + 1), unkPtr++) {
+            if (unkPtr->unk0 == 0) {
+                if (++count >= a2) {
+                    unkPtr -= count - 1;
+                    id = (s16) (id - (count - 1));
+                    break;
+                }
+            }
+            else {
+                count = 0;
+            }
+        }
+    }
+    else {
+        count = 0;
+        id = UNK_3001B7C_SUB0_COUNT - 1;
+        unkPtr = &gUnknown_3001B7C->unk0[UNK_3001B7C_SUB0_COUNT - 1];
+        for (; id >= 0; id = (s16)(id - 1), unkPtr--) {
+            if (unkPtr->unk0 == 0) {
+                if (++count >= a2) {
+                    break;
+                }
+            }
+            else {
+                count = 0;
+            }
+        }
+    }
+
+    if (count >= a2) {
+        s32 i;
+        ptr->unk52 = id;
+        ptr->unk64 = a2;
+        unkPtr->unk0 = 1;
+        unkPtr->unk8 = ptr;
+        GroundSprite_ExtendPaletteAdd(ptr, a1->unk2);
+        for (i = 1; i < a2; i++) {
+            unkPtr[i].unk0 = 2;
+        }
+
+        gUnknown_2039DD4 -= a2;
+        return TRUE;
+    }
+    else {
+        gUnknown_2039DD0 = 0;
+        ptr->unk7C = -1;
+        ptr->unk70 = 0;
+        ptr->unk52 = -1;
+        ptr->unk64 = 0;
+        ptr->unk6C = 0;
+        ptr->unk6E = 0;
+        return FALSE;
+    }
+}
+
+void sub_80A69FC(struct UnkGroundSpriteStruct *ptr)
+{
+    s32 id = ptr->unk52;
+    unkStruct_3001B7C_sub0 *unkPtr = &gUnknown_3001B7C->unk0[id];
+
+    if (id >= 0) {
+        GroundSprite_ExtendPaletteDelete(ptr);
+        unkPtr->unk8 = NULL;
+        unkPtr->unk0 = 0;
+        unkPtr++;
+        gUnknown_2039DD4++;
+        id = (s16)(id + 1);
+        for (; id < UNK_3001B7C_SUB0_COUNT && unkPtr->unk0 == 2; id = (s16)(id + 1)) {
+            unkPtr->unk0 = 0;
+            unkPtr++;
+            gUnknown_2039DD4++;
+        }
+
+        ptr->unk52 = -1;
+        ptr->unk64 = 0;
+        gUnknown_2039DD0 = 1;
+    }
+}