diff --git a/asm/unk_81BAD84.s b/asm/unk_81BAD84.s
deleted file mode 100644
index 2a95feed49..0000000000
--- a/asm/unk_81BAD84.s
+++ /dev/null
@@ -1,57 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start sub_81BAD84
-sub_81BAD84: @ 81BAD84
-	push {r4-r6,lr}
-	movs r6, 0x80
-	lsls r6, 19
-	movs r2, 0
-	strh r2, [r6]
-	ldr r1, =0x04000010
-	strh r2, [r1]
-	adds r1, 0x2
-	strh r2, [r1]
-	adds r1, 0x3E
-	strh r2, [r1]
-	ldr r5, =gUnknown_08617128
-	lsls r4, r0, 1
-	adds r4, r0
-	lsls r4, 2
-	adds r0, r4, r5
-	ldr r0, [r0]
-	movs r1, 0xC0
-	lsls r1, 19
-	bl LZ77UnCompVram
-	adds r0, r5, 0x4
-	adds r0, r4, r0
-	ldr r0, [r0]
-	ldr r1, =0x0600f800
-	bl LZ77UnCompVram
-	adds r5, 0x8
-	adds r4, r5
-	ldr r0, [r4]
-	movs r1, 0xA0
-	lsls r1, 19
-	movs r4, 0x80
-	lsls r4, 1
-	adds r2, r4, 0
-	bl CpuSet
-	ldr r1, =0x04000008
-	movs r2, 0xF8
-	lsls r2, 5
-	adds r0, r2, 0
-	strh r0, [r1]
-	strh r4, [r6]
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_81BAD84
-
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/ld_script.txt b/ld_script.txt
index e9c810adcf..76125e9e26 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -251,7 +251,7 @@ SECTIONS {
         asm/battle_tent.o(.text);
         src/unk_text_util_2.o(.text);
         src/multiboot.o(.text);
-        asm/unk_81BAD84.o(.text);
+        src/unk_81BAD84.o(.text);
         src/battle_controller_player_partner.o(.text);
         asm/fldeff_groundshake.o(.text);
         asm/fossil_specials.o(.text);
diff --git a/src/unk_81BAD84.c b/src/unk_81BAD84.c
new file mode 100644
index 0000000000..43cb9a4b0c
--- /dev/null
+++ b/src/unk_81BAD84.c
@@ -0,0 +1,20 @@
+#include "global.h"
+
+extern const struct {
+    const u8 *unk_0;
+    const u8 *unk_4;
+    const u8 *unk_8;
+} gUnknown_08617128[];
+
+void sub_81BAD84(u32 idx)
+{
+    REG_DISPCNT = 0x0000;
+    REG_BG0HOFS = 0x0000;
+    REG_BG0VOFS = 0x0000;
+    REG_BLDCNT = 0x0000;
+    LZ77UnCompVram(gUnknown_08617128[idx].unk_0, (void *)BG_CHAR_ADDR(0));
+    LZ77UnCompVram(gUnknown_08617128[idx].unk_4, (void *)BG_SCREEN_ADDR(31));
+    CpuCopy16(gUnknown_08617128[idx].unk_8, (void *)PLTT, 0x200);
+    REG_BG0CNT = 0x1f00;
+    REG_DISPCNT = DISPCNT_BG0_ON;
+}