diff --git a/asm/region_map.s b/asm/region_map.s
index ea19702e5d..ff3696fc20 100644
--- a/asm/region_map.s
+++ b/asm/region_map.s
@@ -5,44 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_8124A70
-sub_8124A70: @ 8124A70
-	push {r4,r5,lr}
-	sub sp, 0x8
-	ldr r0, =gUnknown_085A1D68
-	ldr r5, =gUnknown_0203A148
-	ldr r1, [r5]
-	ldr r4, =0x0000088c
-	adds r1, r4
-	bl LZ77UnCompWram
-	ldr r0, [r5]
-	adds r0, r4
-	str r0, [sp]
-	ldr r1, =0xffff0000
-	ldr r0, [sp, 0x4]
-	ands r0, r1
-	movs r1, 0xE0
-	lsls r1, 1
-	orrs r0, r1
-	ldr r1, =0x0000ffff
-	ands r0, r1
-	movs r1, 0x80
-	lsls r1, 10
-	orrs r0, r1
-	str r0, [sp, 0x4]
-	mov r0, sp
-	bl LoadSpriteSheet
-	ldr r0, =gUnknown_085A1F10
-	bl LoadSpritePalette
-	bl sub_8124AD4
-	bl sub_8124BE4
-	add sp, 0x8
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_8124A70
-
 	thumb_func_start sub_8124AD4
 sub_8124AD4: @ 8124AD4
 	push {r4-r7,lr}
diff --git a/src/region_map.c b/src/region_map.c
index b2cb25a595..07ddd7477a 100644
--- a/src/region_map.c
+++ b/src/region_map.c
@@ -46,7 +46,7 @@ EWRAM_DATA struct {
     /*0x004*/ u16 unk_004;
     /*0x006*/ u16 mapSecId;
     /*0x008*/ struct RegionMap regionMap;
-    /*0x88c*/ u8 filler_88c[0x1c0];
+    /*0x88c*/ u8 unk_88c[0x1c0];
     /*0xa4c*/ u8 unk_a4c[0x28];
 } *gUnknown_0203A148 = NULL; // a74
 
@@ -81,6 +81,8 @@ void sub_81248D4(void);
 void sub_81248F4(void func(void));
 void sub_8124904(void);
 void sub_8124A70(void);
+void sub_8124AD4(void);
+void sub_8124BE4(void);
 void sub_8124D14(void);
 
 // .rodata
@@ -106,16 +108,18 @@ extern const struct SpriteTemplate gUnknown_085A1C08;
 extern const struct OamData gUnknown_085A1C20;
 extern const union AnimCmd *const gUnknown_085A1C30[];
 extern const u8 gUnknown_085A1C34[];
-extern const struct BgTemplate gUnknown_085A1EE4[];
-extern const struct WindowTemplate gUnknown_085A1EF0[];
+extern const u16 gUnknown_085A1C38[];
 extern const u8 gUnknown_085A1C58[];
 extern const u8 gUnknown_085A1C90[];
-extern const u16 gUnknown_085A1C38[];
+extern const u8 gUnknown_085A1D68[];
+extern const struct BgTemplate gUnknown_085A1EE4[];
+extern const struct WindowTemplate gUnknown_085A1EF0[];
 extern const struct {
     const u8 *const *name;
     u16 mapSecId;
     u16 flag;
 } gUnknown_085A1EDC[];
+extern const struct SpritePalette gUnknown_085A1F10;
 
 // .text
 
@@ -1459,3 +1463,18 @@ void sub_8124904(void)
         gUnknown_03001180 = FALSE;
     }
 }
+
+
+void sub_8124A70(void)
+{
+    struct SpriteSheet sheet;
+
+    LZ77UnCompWram(gUnknown_085A1D68, gUnknown_0203A148->unk_88c);
+    sheet.data = gUnknown_0203A148->unk_88c;
+    sheet.size = 0x1c0;
+    sheet.tag = 2;
+    LoadSpriteSheet(&sheet);
+    LoadSpritePalette(&gUnknown_085A1F10);
+    sub_8124AD4();
+    sub_8124BE4();
+}