diff --git a/ld/gamefiles.inc b/ld/gamefiles.inc
index 99c8e7718..8c353f713 100644
--- a/ld/gamefiles.inc
+++ b/ld/gamefiles.inc
@@ -26,6 +26,7 @@
 	build/ROMID/game/game_00c490.o (section); \
 	build/ROMID/game/game_0108d0.o (section); \
 	build/ROMID/game/game_0109d0.o (section); \
+	build/ROMID/game/casing/reset.o (section); \
 	build/ROMID/game/game_010b20.o (section); \
 	build/ROMID/game/game_011110.o (section); \
 	build/ROMID/game/inventory/init.o (section); \
@@ -62,7 +63,7 @@
 	build/ROMID/game/weather/tick.o (section); \
 	build/ROMID/game/game_01d860.o (section); \
 	build/ROMID/game/game_01d990.o (section); \
-	build/ROMID/game/game_01d9f0.o (section); \
+	build/ROMID/game/casing/tick.o (section); \
 	build/ROMID/game/game_01de30.o (section); \
 	build/ROMID/game/sparks/tick.o (section); \
 	build/ROMID/game/chr/chr.o (section); \
diff --git a/src/game/casing/reset.c b/src/game/casing/reset.c
new file mode 100644
index 000000000..bd5085a18
--- /dev/null
+++ b/src/game/casing/reset.c
@@ -0,0 +1,74 @@
+#include <ultra64.h>
+#include "constants.h"
+#include "gvars/gvars.h"
+#include "types.h"
+
+GLOBAL_ASM(
+glabel casingsReset
+/*  f010b20:	3c04800a */ 	lui	$a0,%hi(var8009d0d0)
+/*  f010b24:	2484d0d0 */ 	addiu	$a0,$a0,%lo(var8009d0d0)
+/*  f010b28:	ac800000 */ 	sw	$zero,0x0($a0)
+/*  f010b2c:	ac800004 */ 	sw	$zero,0x4($a0)
+/*  f010b30:	3c01800a */ 	lui	$at,%hi(var8009d0d8)
+/*  f010b34:	3c03800a */ 	lui	$v1,%hi(var8009d0e0)
+/*  f010b38:	3c02800a */ 	lui	$v0,%hi(var8009d0f0)
+/*  f010b3c:	ac20d0d8 */ 	sw	$zero,%lo(var8009d0d8)($at)
+/*  f010b40:	2442d0f0 */ 	addiu	$v0,$v0,%lo(var8009d0f0)
+/*  f010b44:	2463d0e0 */ 	addiu	$v1,$v1,%lo(var8009d0e0)
+.L0f010b48:
+/*  f010b48:	24630004 */ 	addiu	$v1,$v1,0x4
+/*  f010b4c:	1462fffe */ 	bne	$v1,$v0,.L0f010b48
+/*  f010b50:	ac60fffc */ 	sw	$zero,-0x4($v1)
+/*  f010b54:	3c02800a */ 	lui	$v0,%hi(var8009da60)
+/*  f010b58:	3c03800a */ 	lui	$v1,%hi(g_Casings)
+/*  f010b5c:	2442da60 */ 	addiu	$v0,$v0,%lo(var8009da60)
+/*  f010b60:	2463d510 */ 	addiu	$v1,$v1,%lo(g_Casings)
+.L0f010b64:
+/*  f010b64:	24630044 */ 	addiu	$v1,$v1,0x44
+/*  f010b68:	0062082b */ 	sltu	$at,$v1,$v0
+/*  f010b6c:	1420fffd */ 	bnez	$at,.L0f010b64
+/*  f010b70:	ac60fffc */ 	sw	$zero,-0x4($v1)
+/*  f010b74:	3c018007 */ 	lui	$at,%hi(g_CasingsActive)
+/*  f010b78:	3c03800a */ 	lui	$v1,%hi(g_Fireslots)
+/*  f010b7c:	3c04800a */ 	lui	$a0,%hi(g_Casings)
+/*  f010b80:	ac200524 */ 	sw	$zero,%lo(g_CasingsActive)($at)
+/*  f010b84:	2484d510 */ 	addiu	$a0,$a0,%lo(g_Casings)
+/*  f010b88:	2463d150 */ 	addiu	$v1,$v1,%lo(g_Fireslots)
+/*  f010b8c:	2402ffff */ 	addiu	$v0,$zero,-1
+.L0f010b90:
+/*  f010b90:	24630030 */ 	addiu	$v1,$v1,0x30
+/*  f010b94:	1464fffe */ 	bne	$v1,$a0,.L0f010b90
+/*  f010b98:	ac62ffd0 */ 	sw	$v0,-0x30($v1)
+/*  f010b9c:	3c02800a */ 	lui	$v0,%hi(g_Vars)
+/*  f010ba0:	24429fc0 */ 	addiu	$v0,$v0,%lo(g_Vars)
+/*  f010ba4:	ac4002b0 */ 	sw	$zero,0x2b0($v0)
+/*  f010ba8:	03e00008 */ 	jr	$ra
+/*  f010bac:	ac4002b4 */ 	sw	$zero,0x2b4($v0)
+);
+
+// Mismatch: Two instructions are swapped
+//void casingsReset(void)
+//{
+//	s32 i;
+//
+//	var8009d0d0[0] = 0;
+//	var8009d0d0[1] = 0;
+//	var8009d0d8 = 0;
+//
+//	for (i = 0; i != ARRAYCOUNT(var8009d0e0); i++) {
+//		var8009d0e0[i] = 0;
+//	}
+//
+//	for (i = 0; i < ARRAYCOUNT(g_Casings); i++) {
+//		g_Casings[i].unk40 = 0;
+//	}
+//
+//	g_CasingsActive = 0;
+//
+//	for (i = 0; i < ARRAYCOUNT(g_Fireslots); i++) {
+//		g_Fireslots[i].unk00 = -1;
+//	}
+//
+//	g_Vars.killcount = 0;
+//	g_Vars.knockoutcount = 0;
+//}
diff --git a/src/game/game_01d9f0.c b/src/game/casing/tick.c
similarity index 99%
rename from src/game/game_01d9f0.c
rename to src/game/casing/tick.c
index e3ed06a88..2e855b989 100644
--- a/src/game/game_01d9f0.c
+++ b/src/game/casing/tick.c
@@ -7,7 +7,7 @@
 #include "game/data/data_01a3a0.h"
 #include "game/data/data_020df0.h"
 #include "game/data/data_02da90.h"
-#include "game/game_01d9f0.h"
+#include "game/casing.h"
 #include "gvars/gvars.h"
 #include "lib/lib_0e9d0.h"
 #include "lib/rng.h"
diff --git a/src/game/core.c b/src/game/core.c
index 03c434941..6d9455bf4 100644
--- a/src/game/core.c
+++ b/src/game/core.c
@@ -24,7 +24,7 @@
 #include "game/game_00c490.h"
 #include "game/game_0108d0.h"
 #include "game/game_0109d0.h"
-#include "game/game_010b20.h"
+#include "game/casing.h"
 #include "game/game_011110.h"
 #include "game/inventory/init.h"
 #include "game/game_0125a0.h"
@@ -56,7 +56,6 @@
 #include "game/weather/tick.h"
 #include "game/game_01d860.h"
 #include "game/game_01d990.h"
-#include "game/game_01d9f0.h"
 #include "game/game_01de30.h"
 #include "game/chr/chr.h"
 #include "game/game_0601b0.h"
diff --git a/src/game/game_010b20.c b/src/game/game_010b20.c
index f7a9a312f..9e1a662e4 100644
--- a/src/game/game_010b20.c
+++ b/src/game/game_010b20.c
@@ -14,76 +14,6 @@
 #include "lib/memory.h"
 #include "types.h"
 
-GLOBAL_ASM(
-glabel casingsReset
-/*  f010b20:	3c04800a */ 	lui	$a0,%hi(var8009d0d0)
-/*  f010b24:	2484d0d0 */ 	addiu	$a0,$a0,%lo(var8009d0d0)
-/*  f010b28:	ac800000 */ 	sw	$zero,0x0($a0)
-/*  f010b2c:	ac800004 */ 	sw	$zero,0x4($a0)
-/*  f010b30:	3c01800a */ 	lui	$at,%hi(var8009d0d8)
-/*  f010b34:	3c03800a */ 	lui	$v1,%hi(var8009d0e0)
-/*  f010b38:	3c02800a */ 	lui	$v0,%hi(var8009d0f0)
-/*  f010b3c:	ac20d0d8 */ 	sw	$zero,%lo(var8009d0d8)($at)
-/*  f010b40:	2442d0f0 */ 	addiu	$v0,$v0,%lo(var8009d0f0)
-/*  f010b44:	2463d0e0 */ 	addiu	$v1,$v1,%lo(var8009d0e0)
-.L0f010b48:
-/*  f010b48:	24630004 */ 	addiu	$v1,$v1,0x4
-/*  f010b4c:	1462fffe */ 	bne	$v1,$v0,.L0f010b48
-/*  f010b50:	ac60fffc */ 	sw	$zero,-0x4($v1)
-/*  f010b54:	3c02800a */ 	lui	$v0,%hi(var8009da60)
-/*  f010b58:	3c03800a */ 	lui	$v1,%hi(g_Casings)
-/*  f010b5c:	2442da60 */ 	addiu	$v0,$v0,%lo(var8009da60)
-/*  f010b60:	2463d510 */ 	addiu	$v1,$v1,%lo(g_Casings)
-.L0f010b64:
-/*  f010b64:	24630044 */ 	addiu	$v1,$v1,0x44
-/*  f010b68:	0062082b */ 	sltu	$at,$v1,$v0
-/*  f010b6c:	1420fffd */ 	bnez	$at,.L0f010b64
-/*  f010b70:	ac60fffc */ 	sw	$zero,-0x4($v1)
-/*  f010b74:	3c018007 */ 	lui	$at,%hi(g_CasingsActive)
-/*  f010b78:	3c03800a */ 	lui	$v1,%hi(g_Fireslots)
-/*  f010b7c:	3c04800a */ 	lui	$a0,%hi(g_Casings)
-/*  f010b80:	ac200524 */ 	sw	$zero,%lo(g_CasingsActive)($at)
-/*  f010b84:	2484d510 */ 	addiu	$a0,$a0,%lo(g_Casings)
-/*  f010b88:	2463d150 */ 	addiu	$v1,$v1,%lo(g_Fireslots)
-/*  f010b8c:	2402ffff */ 	addiu	$v0,$zero,-1
-.L0f010b90:
-/*  f010b90:	24630030 */ 	addiu	$v1,$v1,0x30
-/*  f010b94:	1464fffe */ 	bne	$v1,$a0,.L0f010b90
-/*  f010b98:	ac62ffd0 */ 	sw	$v0,-0x30($v1)
-/*  f010b9c:	3c02800a */ 	lui	$v0,%hi(g_Vars)
-/*  f010ba0:	24429fc0 */ 	addiu	$v0,$v0,%lo(g_Vars)
-/*  f010ba4:	ac4002b0 */ 	sw	$zero,0x2b0($v0)
-/*  f010ba8:	03e00008 */ 	jr	$ra
-/*  f010bac:	ac4002b4 */ 	sw	$zero,0x2b4($v0)
-);
-
-// Mismatch: Two instructions are swapped
-//void casingsReset(void)
-//{
-//	s32 i;
-//
-//	var8009d0d0[0] = 0;
-//	var8009d0d0[1] = 0;
-//	var8009d0d8 = 0;
-//
-//	for (i = 0; i != ARRAYCOUNT(var8009d0e0); i++) {
-//		var8009d0e0[i] = 0;
-//	}
-//
-//	for (i = 0; i < ARRAYCOUNT(g_Casings); i++) {
-//		g_Casings[i].unk40 = 0;
-//	}
-//
-//	g_CasingsActive = 0;
-//
-//	for (i = 0; i < ARRAYCOUNT(g_Fireslots); i++) {
-//		g_Fireslots[i].unk00 = -1;
-//	}
-//
-//	g_Vars.killcount = 0;
-//	g_Vars.knockoutcount = 0;
-//}
-
 extern u32 var800700ac;
 
 void func0f010bb0(void)
diff --git a/src/include/game/game_01d9f0.h b/src/include/game/casing.h
similarity index 59%
rename from src/include/game/game_01d9f0.h
rename to src/include/game/casing.h
index 59256b07a..99edc3302 100644
--- a/src/include/game/game_01d9f0.h
+++ b/src/include/game/casing.h
@@ -1,8 +1,9 @@
-#ifndef IN_GAME_GAME_01D9F0_H
-#define IN_GAME_GAME_01D9F0_H
+#ifndef IN_GAME_CASING_H
+#define IN_GAME_CASING_H
 #include <ultra64.h>
 #include "types.h"
 
+void casingsReset(void);
 void casingTick(struct casing *arg0);
 void casingsTick(void);
 
diff --git a/src/include/game/game_010b20.h b/src/include/game/game_010b20.h
index f77129267..bd66d82db 100644
--- a/src/include/game/game_010b20.h
+++ b/src/include/game/game_010b20.h
@@ -3,7 +3,6 @@
 #include <ultra64.h>
 #include "types.h"
 
-void casingsReset(void);
 void func0f010bb0(void);
 
 #endif