diff --git a/asm/non_matching/beanstalkSubtask/sub_0801A570.inc b/asm/non_matching/beanstalkSubtask/sub_0801A570.inc
deleted file mode 100644
index e7e7effd..00000000
--- a/asm/non_matching/beanstalkSubtask/sub_0801A570.inc
+++ /dev/null
@@ -1,454 +0,0 @@
-	.syntax unified
-	push {r4, r5, r6, r7, lr}
-	mov r7, sl
-	mov r6, sb
-	mov r5, r8
-	push {r5, r6, r7}
-	adds r6, r0, #0
-	mov sl, r1
-	cmp r6, #0
-	bne _0801A58C
-	ldr r0, _0801A588 @ =0x0000FFFF
-	b _0801A8C2
-	.align 2, 0
-_0801A588: .4byte 0x0000FFFF
-_0801A58C:
-	adds r4, r6, #0
-	adds r4, #0x38
-	ldrb r0, [r4]
-	bl GetLayerByIndex
-	mov r8, r0
-	ldr r0, _0801A668 @ =0x00005004
-	add r0, r8
-	mov ip, r0
-	movs r5, #4
-	movs r7, #2
-	ldrb r0, [r6, #0x14]
-	lsrs r0, r0, #1
-	mov sb, r4
-	cmp r0, #1
-	beq _0801A678
-	cmp r0, #1
-	ble _0801A5BC
-	cmp r0, #2
-	bne _0801A5B6
-	b _0801A73C
-_0801A5B6:
-	cmp r0, #3
-	bne _0801A5BC
-	b _0801A7FC
-_0801A5BC:
-	movs r1, #0x2e
-	ldrsh r0, [r6, r1]
-	ldr r2, _0801A66C @ =gRoomControls
-	ldrh r1, [r2, #6]
-	subs r0, r0, r1
-	asrs r4, r0, #4
-	movs r3, #0x3f
-	ands r4, r3
-	movs r1, #0x32
-	ldrsh r0, [r6, r1]
-	ldrh r1, [r2, #8]
-	adds r1, #0xa
-	subs r0, r0, r1
-	asrs r0, r0, #4
-	ands r0, r3
-	lsls r0, r0, #6
-	orrs r4, r0
-	mov r2, r8
-	adds r2, #4
-	movs r3, #0xdc
-	lsls r3, r3, #2
-	lsls r0, r4, #1
-	adds r1, r0, r2
-_0801A5EA:
-	ldrh r0, [r1]
-	lsls r0, r0, #1
-	add r0, ip
-	ldrh r0, [r0]
-	cmp r0, r3
-	beq _0801A600
-	subs r1, #2
-	subs r4, #1
-	subs r5, #1
-	cmp r5, #0
-	bne _0801A5EA
-_0801A600:
-	subs r4, #0x40
-	movs r3, #0xdd
-	lsls r3, r3, #2
-	lsls r0, r4, #1
-	adds r1, r0, r2
-_0801A60A:
-	ldrh r0, [r1]
-	lsls r0, r0, #1
-	add r0, ip
-	ldrh r0, [r0]
-	cmp r0, r3
-	bne _0801A620
-	adds r7, #1
-	subs r1, #0x80
-	subs r4, #0x40
-	cmp r7, #3
-	bls _0801A60A
-_0801A620:
-	mov r2, sl
-	cmp r2, #0
-	bne _0801A628
-	b _0801A8C0
-_0801A628:
-	mov r0, sb
-	ldrb r1, [r0]
-	adds r0, r4, #0
-	bl GetTileType
-	adds r5, r0, #0
-	ldr r1, _0801A670 @ =0xFFFFFC97
-	adds r0, r5, r1
-	cmp r0, #1
-	bls _0801A63E
-	b _0801A8B4
-_0801A63E:
-	ldr r2, _0801A674 @ =0x00001FC4
-	adds r0, r4, r2
-	mov r2, r8
-	adds r1, r2, r0
-	movs r5, #0
-	cmp r5, r7
-	blo _0801A64E
-	b _0801A8B6
-_0801A64E:
-	ldrb r0, [r1]
-	cmp r0, #0
-	beq _0801A656
-	b _0801A8B4
-_0801A656:
-	adds r5, #1
-	cmp r5, r7
-	blo _0801A65E
-	b _0801A8B6
-_0801A65E:
-	adds r0, r1, r5
-	ldrb r0, [r0]
-	cmp r0, #0
-	beq _0801A656
-	b _0801A8B4
-	.align 2, 0
-_0801A668: .4byte 0x00005004
-_0801A66C: .4byte gRoomControls
-_0801A670: .4byte 0xFFFFFC97
-_0801A674: .4byte 0x00001FC4
-_0801A678:
-	movs r0, #0x2e
-	ldrsh r1, [r6, r0]
-	ldr r3, _0801A730 @ =gRoomControls
-	ldrh r0, [r3, #6]
-	subs r0, #0xa
-	subs r1, r1, r0
-	asrs r4, r1, #4
-	movs r2, #0x3f
-	ands r4, r2
-	movs r1, #0x32
-	ldrsh r0, [r6, r1]
-	ldrh r1, [r3, #8]
-	subs r0, r0, r1
-	asrs r0, r0, #4
-	ands r0, r2
-	lsls r0, r0, #6
-	orrs r4, r0
-	mov r2, r8
-	adds r2, #4
-	mov r3, ip
-	movs r6, #0xdc
-	lsls r6, r6, #2
-	lsls r0, r4, #1
-	adds r1, r0, r2
-_0801A6A8:
-	ldrh r0, [r1]
-	lsls r0, r0, #1
-	adds r0, r3, r0
-	ldrh r0, [r0]
-	cmp r0, r6
-	beq _0801A6BE
-	adds r1, #0x80
-	adds r4, #0x40
-	subs r5, #1
-	cmp r5, #0
-	bne _0801A6A8
-_0801A6BE:
-	subs r4, #0x40
-	movs r3, #0xdd
-	lsls r3, r3, #2
-	lsls r0, r4, #1
-	adds r1, r0, r2
-_0801A6C8:
-	ldrh r0, [r1]
-	lsls r0, r0, #1
-	add r0, ip
-	ldrh r0, [r0]
-	cmp r0, r3
-	bne _0801A6DE
-	adds r7, #1
-	subs r1, #0x80
-	subs r4, #0x40
-	cmp r7, #3
-	bls _0801A6C8
-_0801A6DE:
-	mov r2, sl
-	cmp r2, #0
-	bne _0801A6E6
-	b _0801A8C0
-_0801A6E6:
-	mov r0, sb
-	ldrb r1, [r0]
-	adds r0, r4, #0
-	bl GetTileType
-	adds r5, r0, #0
-	ldr r0, _0801A734 @ =0x00000369
-	cmp r5, r0
-	beq _0801A700
-	adds r0, #4
-	cmp r5, r0
-	beq _0801A700
-	b _0801A8B4
-_0801A700:
-	adds r0, r4, r7
-	ldr r1, _0801A738 @ =0x00002004
-	adds r0, r0, r1
-	mov r2, r8
-	adds r1, r2, r0
-	movs r5, #0
-	cmp r5, r7
-	blo _0801A712
-	b _0801A8B6
-_0801A712:
-	ldrb r0, [r1]
-	cmp r0, #0
-	beq _0801A71A
-	b _0801A8B4
-_0801A71A:
-	adds r5, #1
-	cmp r5, r7
-	blo _0801A722
-	b _0801A8B6
-_0801A722:
-	lsls r0, r5, #6
-	adds r0, r0, r1
-	ldrb r0, [r0]
-	cmp r0, #0
-	beq _0801A71A
-	b _0801A8B4
-	.align 2, 0
-_0801A730: .4byte gRoomControls
-_0801A734: .4byte 0x00000369
-_0801A738: .4byte 0x00002004
-_0801A73C:
-	movs r1, #0x2e
-	ldrsh r0, [r6, r1]
-	ldr r2, _0801A7E8 @ =gRoomControls
-	ldrh r1, [r2, #6]
-	subs r0, r0, r1
-	asrs r4, r0, #4
-	movs r3, #0x3f
-	ands r4, r3
-	movs r1, #0x32
-	ldrsh r0, [r6, r1]
-	ldrh r1, [r2, #8]
-	subs r1, #0xa
-	subs r0, r0, r1
-	asrs r0, r0, #4
-	ands r0, r3
-	lsls r0, r0, #6
-	orrs r4, r0
-	mov r2, r8
-	adds r2, #4
-	mov r3, ip
-	ldr r6, _0801A7EC @ =0x0000036F
-	lsls r0, r4, #1
-	adds r1, r0, r2
-_0801A76A:
-	ldrh r0, [r1]
-	lsls r0, r0, #1
-	adds r0, r3, r0
-	ldrh r0, [r0]
-	cmp r0, r6
-	beq _0801A780
-	adds r1, #2
-	adds r4, #1
-	subs r5, #1
-	cmp r5, #0
-	bne _0801A76A
-_0801A780:
-	subs r4, #1
-	ldr r3, _0801A7F0 @ =0x00000372
-	lsls r0, r4, #1
-	adds r1, r0, r2
-_0801A788:
-	ldrh r0, [r1]
-	lsls r0, r0, #1
-	add r0, ip
-	ldrh r0, [r0]
-	cmp r0, r3
-	bne _0801A79E
-	adds r7, #1
-	subs r1, #2
-	subs r4, #1
-	cmp r7, #3
-	bls _0801A788
-_0801A79E:
-	mov r2, sl
-	cmp r2, #0
-	bne _0801A7A6
-	b _0801A8C0
-_0801A7A6:
-	mov r0, sb
-	ldrb r1, [r0]
-	adds r0, r4, #0
-	bl GetTileType
-	adds r5, r0, #0
-	ldr r0, _0801A7F4 @ =0x00000369
-	cmp r5, r0
-	beq _0801A7BE
-	adds r0, #2
-	cmp r5, r0
-	bne _0801A8B4
-_0801A7BE:
-	lsls r0, r7, #6
-	adds r0, r4, r0
-	ldr r1, _0801A7F8 @ =0x00002004
-	adds r0, r0, r1
-	mov r2, r8
-	adds r1, r2, r0
-	movs r5, #0
-	cmp r5, r7
-	bhs _0801A8B6
-	ldrb r0, [r1]
-	cmp r0, #0
-	bne _0801A8B4
-_0801A7D6:
-	adds r5, #1
-	cmp r5, r7
-	bhs _0801A8B6
-	adds r0, r1, r5
-	ldrb r0, [r0]
-	cmp r0, #0
-	beq _0801A7D6
-	b _0801A8B4
-	.align 2, 0
-_0801A7E8: .4byte gRoomControls
-_0801A7EC: .4byte 0x0000036F
-_0801A7F0: .4byte 0x00000372
-_0801A7F4: .4byte 0x00000369
-_0801A7F8: .4byte 0x00002004
-_0801A7FC:
-	movs r0, #0x2e
-	ldrsh r1, [r6, r0]
-	ldr r3, _0801A890 @ =gRoomControls
-	ldrh r0, [r3, #6]
-	adds r0, #0xa
-	subs r1, r1, r0
-	asrs r4, r1, #4
-	movs r2, #0x3f
-	ands r4, r2
-	movs r1, #0x32
-	ldrsh r0, [r6, r1]
-	ldrh r1, [r3, #8]
-	subs r0, r0, r1
-	asrs r0, r0, #4
-	ands r0, r2
-	lsls r0, r0, #6
-	orrs r4, r0
-	mov r2, r8
-	adds r2, #4
-	mov r3, ip
-	ldr r6, _0801A894 @ =0x0000036F
-	lsls r0, r4, #1
-	adds r1, r0, r2
-_0801A82A:
-	ldrh r0, [r1]
-	lsls r0, r0, #1
-	adds r0, r3, r0
-	ldrh r0, [r0]
-	cmp r0, r6
-	beq _0801A840
-	subs r1, #0x80
-	subs r4, #0x40
-	subs r5, #1
-	cmp r5, #0
-	bne _0801A82A
-_0801A840:
-	subs r4, #1
-	ldr r3, _0801A898 @ =0x00000372
-	lsls r0, r4, #1
-	adds r1, r0, r2
-_0801A848:
-	ldrh r0, [r1]
-	lsls r0, r0, #1
-	add r0, ip
-	ldrh r0, [r0]
-	cmp r0, r3
-	bne _0801A85E
-	adds r7, #1
-	subs r1, #2
-	subs r4, #1
-	cmp r7, #3
-	bls _0801A848
-_0801A85E:
-	mov r2, sl
-	cmp r2, #0
-	beq _0801A8C0
-	mov r0, sb
-	ldrb r1, [r0]
-	adds r0, r4, #0
-	bl GetTileType
-	adds r5, r0, #0
-	ldr r0, _0801A89C @ =0x00000369
-	cmp r5, r0
-	beq _0801A87C
-	adds r0, #3
-	cmp r5, r0
-	bne _0801A8B4
-_0801A87C:
-	ldr r1, _0801A8A0 @ =0x00002003
-	adds r0, r4, r1
-	mov r2, r8
-	adds r1, r2, r0
-	movs r5, #0
-	cmp r5, r7
-	bhs _0801A8B6
-	ldrb r0, [r1]
-	b _0801A8B0
-	.align 2, 0
-_0801A890: .4byte gRoomControls
-_0801A894: .4byte 0x0000036F
-_0801A898: .4byte 0x00000372
-_0801A89C: .4byte 0x00000369
-_0801A8A0: .4byte 0x00002003
-_0801A8A4:
-	adds r5, #1
-	cmp r5, r7
-	bhs _0801A8B6
-	lsls r0, r5, #6
-	adds r0, r0, r1
-	ldrb r0, [r0]
-_0801A8B0:
-	cmp r0, #0
-	beq _0801A8A4
-_0801A8B4:
-	ldr r4, _0801A8CC @ =0x0000FFFF
-_0801A8B6:
-	mov r0, sl
-	cmp r0, #0
-	beq _0801A8C0
-	lsls r0, r7, #0xc
-	orrs r4, r0
-_0801A8C0:
-	adds r0, r4, #0
-_0801A8C2:
-	pop {r3, r4, r5}
-	mov r8, r3
-	mov sb, r4
-	mov sl, r5
-	pop {r4, r5, r6, r7, pc}
-	.align 2, 0
-_0801A8CC: .4byte 0x0000FFFF
-	.syntax divided
diff --git a/src/beanstalkSubtask.c b/src/beanstalkSubtask.c
index 58efa6f8..f414b7cc 100644
--- a/src/beanstalkSubtask.c
+++ b/src/beanstalkSubtask.c
@@ -736,7 +736,185 @@ bool32 sub_0801A4F8(void) {
     return TRUE;
 }
 
-ASM_FUNC("asm/non_matching/beanstalkSubtask/sub_0801A570.inc", u32 sub_0801A570(Entity* a, u32 b))
+u32 sub_0801A570(Entity* this, u32 param_2) {
+    LayerStruct* layer;
+    u32 tileType;
+    u32 position;
+    s32 index1;
+    u32 index2;
+    u16* metatileTypes;
+    u8* collisionData;
+
+    if (this == NULL) {
+        return 0xffff;
+    }
+    layer = GetLayerByIndex(this->collisionLayer);
+    metatileTypes = layer->metatileTypes;
+    index1 = 4;
+    index2 = 2;
+    switch (this->animationState >> 1) {
+        case 0:
+        default:
+            position = COORD_TO_TILE_OFFSET(this, 0, 10);
+            do {
+                if (metatileTypes[layer->mapData[position]] == 0x370)
+                    break;
+                position--;
+                index1--;
+            } while (index1 != 0);
+
+            position = position - 0x40;
+            do {
+                if (metatileTypes[layer->mapData[(position)]] != 0x374)
+                    break;
+                index2++;
+                position -= 0x40;
+            } while (index2 < 4);
+
+            if (param_2 == 0) {
+                return position;
+            }
+
+            index1 = GetTileType(position, this->collisionLayer);
+            if ((u32)(index1 - 0x369) <= 1) {
+                collisionData = layer->collisionData - 0x40 + position;
+                index1 = 0;
+
+                if (index1 < index2) {
+                    while (collisionData[index1] == 0) {
+                        if (++index1 >= index2)
+                            goto end;
+                    }
+                } else {
+                    goto end;
+                }
+            }
+            break;
+        case 1:
+            position = COORD_TO_TILE_OFFSET(this, -10, 0);
+            do {
+                if (layer->metatileTypes[layer->mapData[position]] == 0x370)
+                    break;
+                position += 0x40;
+                index1--;
+            } while (index1 != 0);
+
+            position = position - 0x40;
+            do {
+                if (metatileTypes[layer->mapData[(position)]] != 0x374)
+                    break;
+                index2++;
+                position -= 0x40;
+            } while (index2 < 4);
+
+            if (param_2 == 0) {
+                return position;
+            }
+            index1 = GetTileType(position, this->collisionLayer);
+
+            if ((index1 == 0x369) || (index1 == 0x36d)) {
+                collisionData = layer->collisionData + (position + index2);
+                index1 = 0;
+
+                if (index1 < index2) {
+                    u8* flagPtr = collisionData + index1;
+                    while (*flagPtr == 0) {
+                        if (++index1 >= index2)
+                            goto end;
+                        flagPtr = (u8*)((index1 << 6) + (u32)collisionData);
+                    }
+                } else {
+                    goto end;
+                }
+            }
+            break;
+        case 2:
+            position = COORD_TO_TILE_OFFSET(this, 0, -10);
+            do {
+                if (layer->metatileTypes[layer->mapData[position]] == 0x36f)
+                    break;
+                position++;
+                index1--;
+            } while (index1 != 0);
+
+            position = position - 1;
+            do {
+                if (metatileTypes[layer->mapData[position]] != 0x372)
+                    break;
+                index2++;
+                position--;
+            } while (index2 < 4);
+
+            if (param_2 == 0) {
+                return position;
+            }
+
+            index1 = GetTileType(position, this->collisionLayer);
+            if ((index1 == 0x369) || (index1 == 0x36b)) {
+                collisionData = layer->collisionData + (position + (index2 * 0x40));
+                index1 = 0;
+                if (index1 < index2) {
+                    while (collisionData[index1] == 0) {
+                        if (++index1 >= index2)
+                            goto end;
+                    }
+                } else {
+                    goto end;
+                }
+            }
+            break;
+        case 3:
+            position = COORD_TO_TILE_OFFSET(this, 10, 0);
+            do {
+                if (layer->metatileTypes[layer->mapData[position]] == 0x36f)
+                    break;
+                position -= 0x40;
+                index1--;
+            } while (index1 != 0);
+
+            position = position - 1;
+            do {
+                if (metatileTypes[layer->mapData[position]] != 0x372)
+                    break;
+                index2++;
+                position--;
+            } while (index2 < 4);
+
+            if (param_2 == 0) {
+                return position;
+            }
+
+            index1 = GetTileType(position, this->collisionLayer);
+            if ((index1 == 0x369) || (index1 == 0x36c)) {
+                collisionData = layer->collisionData - 1 + position;
+
+                // This loop is functionally equivalent to the one present in case 1
+                index1 = 0;
+                if (index1 < index2) {
+                    u32 flag;
+                    flag = collisionData[index1];
+                    goto case3_flag_check;
+                case3_loop_back:
+                    if (++index1 >= index2)
+                        goto end;
+                    flag = *(u8*)((index1 << 6) + (u32)collisionData);
+                case3_flag_check:
+                    if (flag != 0)
+                        break;
+                    goto case3_loop_back;
+                } else {
+                    goto end;
+                }
+            }
+            break;
+    }
+    position = 0xffff;
+end:
+    if (param_2 != 0) {
+        position |= index2 << 0xc;
+    }
+    return position;
+}
 
 u32 sub_0801A8D0(Entity* this, u32 param_2) {
     u16* mapData;