diff --git a/src/game/core.c b/src/game/core.c
index 1183f6776..03c434941 100644
--- a/src/game/core.c
+++ b/src/game/core.c
@@ -406,7 +406,7 @@ void coreLoadStage(s32 stagenum)
 		s32 i;
 
 		func0f1777f8();
-		func0f010b20();
+		casingsReset();
 
 		for (i = 0; i < PLAYERCOUNT(); i++) {
 			setCurrentPlayerNum(i);
@@ -2174,7 +2174,7 @@ void coreTick(void)
 		coreUpdateSoloHandicaps();
 		func0f01d8c0();
 		func0f01d990();
-		func0f01dd6c();
+		casingsTick();
 		func0f01de30();
 		sparksTick();
 		func0f13eb44();
diff --git a/src/game/data/data_0160b0.c b/src/game/data/data_0160b0.c
index ecc3de3ce..c1e14cad6 100644
--- a/src/game/data/data_0160b0.c
+++ b/src/game/data/data_0160b0.c
@@ -24,7 +24,7 @@ u32 var80070514 = 0x00000000;
 u32 var80070518 = 0x00000000;
 u32 var8007051c = 0x00000000;
 u32 var80070520 = 0x00000000;
-s32 var80070524 = 0x00000000;
+s32 g_CasingsActive = 0x00000000;
 u32 var80070528 = 0x00000000;
 u32 var8007052c = 0x00000000;
 u32 var80070530 = 0x00000000;
diff --git a/src/game/game_010b20.c b/src/game/game_010b20.c
index 2fde4812a..f7a9a312f 100644
--- a/src/game/game_010b20.c
+++ b/src/game/game_010b20.c
@@ -15,7 +15,7 @@
 #include "types.h"
 
 GLOBAL_ASM(
-glabel func0f010b20
+glabel casingsReset
 /*  f010b20:	3c04800a */ 	lui	$a0,%hi(var8009d0d0)
 /*  f010b24:	2484d0d0 */ 	addiu	$a0,$a0,%lo(var8009d0d0)
 /*  f010b28:	ac800000 */ 	sw	$zero,0x0($a0)
@@ -31,19 +31,19 @@ glabel func0f010b20
 /*  f010b4c:	1462fffe */ 	bne	$v1,$v0,.L0f010b48
 /*  f010b50:	ac60fffc */ 	sw	$zero,-0x4($v1)
 /*  f010b54:	3c02800a */ 	lui	$v0,%hi(var8009da60)
-/*  f010b58:	3c03800a */ 	lui	$v1,%hi(var8009d510)
+/*  f010b58:	3c03800a */ 	lui	$v1,%hi(g_Casings)
 /*  f010b5c:	2442da60 */ 	addiu	$v0,$v0,%lo(var8009da60)
-/*  f010b60:	2463d510 */ 	addiu	$v1,$v1,%lo(var8009d510)
+/*  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(var80070524)
+/*  f010b74:	3c018007 */ 	lui	$at,%hi(g_CasingsActive)
 /*  f010b78:	3c03800a */ 	lui	$v1,%hi(g_Fireslots)
-/*  f010b7c:	3c04800a */ 	lui	$a0,%hi(var8009d510)
-/*  f010b80:	ac200524 */ 	sw	$zero,%lo(var80070524)($at)
-/*  f010b84:	2484d510 */ 	addiu	$a0,$a0,%lo(var8009d510)
+/*  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:
@@ -58,7 +58,7 @@ glabel func0f010b20
 );
 
 // Mismatch: Two instructions are swapped
-//void func0f010b20(void)
+//void casingsReset(void)
 //{
 //	s32 i;
 //
@@ -70,11 +70,11 @@ glabel func0f010b20
 //		var8009d0e0[i] = 0;
 //	}
 //
-//	for (i = 0; i < ARRAYCOUNT(var8009d510); i++) {
-//		var8009d510[i].unk40 = 0;
+//	for (i = 0; i < ARRAYCOUNT(g_Casings); i++) {
+//		g_Casings[i].unk40 = 0;
 //	}
 //
-//	var80070524 = 0;
+//	g_CasingsActive = 0;
 //
 //	for (i = 0; i < ARRAYCOUNT(g_Fireslots); i++) {
 //		g_Fireslots[i].unk00 = -1;
diff --git a/src/game/game_01d9f0.c b/src/game/game_01d9f0.c
index ee842c245..e3ed06a88 100644
--- a/src/game/game_01d9f0.c
+++ b/src/game/game_01d9f0.c
@@ -21,7 +21,7 @@ const u32 var7f1a8668[] = {0x00000000};
 const u32 var7f1a866c[] = {0x00000000};
 
 GLOBAL_ASM(
-glabel func0f01d9f0
+glabel casingTick
 /*  f01d9f0:	27bdff48 */ 	addiu	$sp,$sp,-184
 /*  f01d9f4:	afb40034 */ 	sw	$s4,0x34($sp)
 /*  f01d9f8:	3c14800a */ 	lui	$s4,%hi(g_Vars)
@@ -263,7 +263,7 @@ glabel func0f01d9f0
 );
 
 GLOBAL_ASM(
-glabel func0f01dd6c
+glabel casingsTick
 /*  f01dd6c:	3c03800a */ 	lui	$v1,%hi(var8009d0d8)
 /*  f01dd70:	2463d0d8 */ 	addiu	$v1,$v1,%lo(var8009d0d8)
 /*  f01dd74:	27bdffd8 */ 	addiu	$sp,$sp,-40
@@ -281,23 +281,23 @@ glabel func0f01dd6c
 /*  f01dda4:	01e01025 */ 	or	$v0,$t7,$zero
 .L0f01dda8:
 /*  f01dda8:	04410002 */ 	bgez	$v0,.L0f01ddb4
-/*  f01ddac:	3c118007 */ 	lui	$s1,%hi(var80070524)
+/*  f01ddac:	3c118007 */ 	lui	$s1,%hi(g_CasingsActive)
 /*  f01ddb0:	ac600000 */ 	sw	$zero,0x0($v1)
 .L0f01ddb4:
-/*  f01ddb4:	26310524 */ 	addiu	$s1,$s1,%lo(var80070524)
+/*  f01ddb4:	26310524 */ 	addiu	$s1,$s1,%lo(g_CasingsActive)
 /*  f01ddb8:	8e380000 */ 	lw	$t8,0x0($s1)
 /*  f01ddbc:	3c13800a */ 	lui	$s3,%hi(var8009da60)
 /*  f01ddc0:	2673da60 */ 	addiu	$s3,$s3,%lo(var8009da60)
 /*  f01ddc4:	13000011 */ 	beqz	$t8,.L0f01de0c
-/*  f01ddc8:	3c10800a */ 	lui	$s0,%hi(var8009d510)
+/*  f01ddc8:	3c10800a */ 	lui	$s0,%hi(g_Casings)
 /*  f01ddcc:	ae200000 */ 	sw	$zero,0x0($s1)
-/*  f01ddd0:	2610d510 */ 	addiu	$s0,$s0,%lo(var8009d510)
+/*  f01ddd0:	2610d510 */ 	addiu	$s0,$s0,%lo(g_Casings)
 /*  f01ddd4:	24120001 */ 	addiu	$s2,$zero,0x1
 /*  f01ddd8:	8e190040 */ 	lw	$t9,0x40($s0)
 .L0f01dddc:
 /*  f01dddc:	53200008 */ 	beqzl	$t9,.L0f01de00
 /*  f01dde0:	26100044 */ 	addiu	$s0,$s0,0x44
-/*  f01dde4:	0fc0767c */ 	jal	func0f01d9f0
+/*  f01dde4:	0fc0767c */ 	jal	casingTick
 /*  f01dde8:	02002025 */ 	or	$a0,$s0,$zero
 /*  f01ddec:	8e280000 */ 	lw	$t0,0x0($s1)
 /*  f01ddf0:	55000003 */ 	bnezl	$t0,.L0f01de00
@@ -319,3 +319,32 @@ glabel func0f01dd6c
 /*  f01de28:	00000000 */ 	nop
 /*  f01de2c:	00000000 */ 	nop
 );
+
+// Mismatch: g_Casings needs to be moved into this file.
+// Also end loop condition is bnel but needs to be sltu, bnezl.
+//void casingsTick(void)
+//{
+//	s32 i;
+//
+//	if (var8009d0d8 > 0) {
+//		var8009d0d8 -= g_Vars.lvupdate240;
+//	}
+//
+//	if (var8009d0d8 < 0) {
+//		var8009d0d8 = 0;
+//	}
+//
+//	if (g_CasingsActive) {
+//		g_CasingsActive = false;
+//
+//		for (i = 0; i < ARRAYCOUNT(g_Casings); i++) {
+//			if (g_Casings[i].unk40) {
+//				casingTick(&g_Casings[i]);
+//
+//				if (!g_CasingsActive) {
+//					g_CasingsActive = true;
+//				}
+//			}
+//		}
+//	}
+//}
diff --git a/src/game/game_097ba0.c b/src/game/game_097ba0.c
index 2958a096a..23c14b213 100644
--- a/src/game/game_097ba0.c
+++ b/src/game/game_097ba0.c
@@ -8032,11 +8032,11 @@ glabel func0f09df9c
 /*  f09dfac:	3c02800a */ 	lui	$v0,%hi(var8009da60)
 /*  f09dfb0:	a5ee159c */ 	sh	$t6,0x159c($t7)
 /*  f09dfb4:	8c980284 */ 	lw	$t8,0x284($a0)
-/*  f09dfb8:	3c03800a */ 	lui	$v1,%hi(var8009d510)
+/*  f09dfb8:	3c03800a */ 	lui	$v1,%hi(g_Casings)
 /*  f09dfbc:	2442da60 */ 	addiu	$v0,$v0,%lo(var8009da60)
 /*  f09dfc0:	af001594 */ 	sw	$zero,0x1594($t8)
 /*  f09dfc4:	8c990284 */ 	lw	$t9,0x284($a0)
-/*  f09dfc8:	2463d510 */ 	addiu	$v1,$v1,%lo(var8009d510)
+/*  f09dfc8:	2463d510 */ 	addiu	$v1,$v1,%lo(g_Casings)
 /*  f09dfcc:	af2015a0 */ 	sw	$zero,0x15a0($t9)
 /*  f09dfd0:	8c880284 */ 	lw	$t0,0x284($a0)
 /*  f09dfd4:	ad0015a4 */ 	sw	$zero,0x15a4($t0)
@@ -8049,9 +8049,9 @@ glabel func0f09df9c
 /*  f09dfec:	0062082b */ 	sltu	$at,$v1,$v0
 /*  f09dff0:	1420fffd */ 	bnez	$at,.L0f09dfe8
 /*  f09dff4:	ac60fffc */ 	sw	$zero,-0x4($v1)
-/*  f09dff8:	3c018007 */ 	lui	$at,%hi(var80070524)
+/*  f09dff8:	3c018007 */ 	lui	$at,%hi(g_CasingsActive)
 /*  f09dffc:	03e00008 */ 	jr	$ra
-/*  f09e000:	ac200524 */ 	sw	$zero,%lo(var80070524)($at)
+/*  f09e000:	ac200524 */ 	sw	$zero,%lo(g_CasingsActive)($at)
 );
 
 //void func0f09df9c(void)
@@ -8066,10 +8066,10 @@ glabel func0f09df9c
 //	g_Vars.currentplayer->unk15b1 = 0;
 //
 //	for (i = 0; i < 20; i++) {
-//		var8009d510[i].unk40 = 0;
+//		g_Casings[i].unk40 = 0;
 //	}
 //
-//	var80070524 = 0;
+//	g_CasingsActive = 0;
 //}
 
 GLOBAL_ASM(
@@ -8504,8 +8504,8 @@ glabel func0f09e4e0
 /*  f09e5cc:	00c08025 */ 	or	$s0,$a2,$zero
 .L0f09e5d0:
 /*  f09e5d0:	8fab00a4 */ 	lw	$t3,0xa4($sp)
-/*  f09e5d4:	3c05800a */ 	lui	$a1,%hi(var8009d510)
-/*  f09e5d8:	24a5d510 */ 	addiu	$a1,$a1,%lo(var8009d510)
+/*  f09e5d4:	3c05800a */ 	lui	$a1,%hi(g_Casings)
+/*  f09e5d8:	24a5d510 */ 	addiu	$a1,$a1,%lo(g_Casings)
 /*  f09e5dc:	15660004 */ 	bne	$t3,$a2,.L0f09e5f0
 /*  f09e5e0:	3c03800a */ 	lui	$v1,%hi(var8009da60)
 /*  f09e5e4:	3233ffff */ 	andi	$s3,$s1,0xffff
@@ -8513,10 +8513,10 @@ glabel func0f09e4e0
 /*  f09e5ec:	00008025 */ 	or	$s0,$zero,$zero
 .L0f09e5f0:
 /*  f09e5f0:	924215b0 */ 	lbu	$v0,0x15b0($s2)
-/*  f09e5f4:	3c048007 */ 	lui	$a0,%hi(var80070524)
+/*  f09e5f4:	3c048007 */ 	lui	$a0,%hi(g_CasingsActive)
 /*  f09e5f8:	2463da60 */ 	addiu	$v1,$v1,%lo(var8009da60)
 /*  f09e5fc:	14400019 */ 	bnez	$v0,.L0f09e664
-/*  f09e600:	24840524 */ 	addiu	$a0,$a0,%lo(var80070524)
+/*  f09e600:	24840524 */ 	addiu	$a0,$a0,%lo(g_CasingsActive)
 /*  f09e604:	00a01025 */ 	or	$v0,$a1,$zero
 /*  f09e608:	8e4c1598 */ 	lw	$t4,0x1598($s2)
 .L0f09e60c:
diff --git a/src/game/game_0abe70.c b/src/game/game_0abe70.c
index f3e02fbea..127483deb 100644
--- a/src/game/game_0abe70.c
+++ b/src/game/game_0abe70.c
@@ -2113,15 +2113,15 @@ void bullettailTick(struct bullettail *tail)
 
 GLOBAL_ASM(
 glabel func0f0adcc8
-/*  f0adcc8:	3c0e800a */ 	lui	$t6,%hi(var8009d510+0x40)
-/*  f0adccc:	8dced550 */ 	lw	$t6,%lo(var8009d510+0x40)($t6)
+/*  f0adcc8:	3c0e800a */ 	lui	$t6,%hi(g_Casings+0x40)
+/*  f0adccc:	8dced550 */ 	lw	$t6,%lo(g_Casings+0x40)($t6)
 /*  f0adcd0:	27bdffa0 */ 	addiu	$sp,$sp,-96
-/*  f0adcd4:	3c08800a */ 	lui	$t0,%hi(var8009d510)
+/*  f0adcd4:	3c08800a */ 	lui	$t0,%hi(g_Casings)
 /*  f0adcd8:	afbf0014 */ 	sw	$ra,0x14($sp)
 /*  f0adcdc:	00803825 */ 	or	$a3,$a0,$zero
 /*  f0adce0:	00a03025 */ 	or	$a2,$a1,$zero
 /*  f0adce4:	11c0000a */ 	beqz	$t6,.L0f0add10
-/*  f0adce8:	2508d510 */ 	addiu	$t0,$t0,%lo(var8009d510)
+/*  f0adce8:	2508d510 */ 	addiu	$t0,$t0,%lo(g_Casings)
 /*  f0adcec:	3c02800a */ 	lui	$v0,%hi(var8009da60)
 /*  f0adcf0:	2442da60 */ 	addiu	$v0,$v0,%lo(var8009da60)
 /*  f0adcf4:	25080044 */ 	addiu	$t0,$t0,0x44
@@ -2188,8 +2188,8 @@ glabel func0f0adcc8
 /*  f0addd4:	14c9ffe5 */ 	bne	$a2,$t1,.L0f0add6c
 /*  f0addd8:	24e70006 */ 	addiu	$a3,$a3,0x6
 /*  f0adddc:	240a0001 */ 	addiu	$t2,$zero,0x1
-/*  f0adde0:	3c018007 */ 	lui	$at,%hi(var80070524)
-/*  f0adde4:	ac2a0524 */ 	sw	$t2,%lo(var80070524)($at)
+/*  f0adde0:	3c018007 */ 	lui	$at,%hi(g_CasingsActive)
+/*  f0adde4:	ac2a0524 */ 	sw	$t2,%lo(g_CasingsActive)($at)
 /*  f0adde8:	10000001 */ 	b	.L0f0addf0
 /*  f0addec:	01001025 */ 	or	$v0,$t0,$zero
 .L0f0addf0:
@@ -3211,8 +3211,8 @@ glabel var7f1acd6c
 
 GLOBAL_ASM(
 glabel func0f0aebe0
-/*  f0aebe0:	3c0e8007 */ 	lui	$t6,%hi(var80070524)
-/*  f0aebe4:	8dce0524 */ 	lw	$t6,%lo(var80070524)($t6)
+/*  f0aebe0:	3c0e8007 */ 	lui	$t6,%hi(g_CasingsActive)
+/*  f0aebe4:	8dce0524 */ 	lw	$t6,%lo(g_CasingsActive)($t6)
 /*  f0aebe8:	27bdffd8 */ 	addiu	$sp,$sp,-40
 /*  f0aebec:	afb20020 */ 	sw	$s2,0x20($sp)
 /*  f0aebf0:	00809025 */ 	or	$s2,$a0,$zero
@@ -3221,9 +3221,9 @@ glabel func0f0aebe0
 /*  f0aebfc:	11c0000f */ 	beqz	$t6,.L0f0aec3c
 /*  f0aec00:	afb00018 */ 	sw	$s0,0x18($sp)
 /*  f0aec04:	3c11800a */ 	lui	$s1,%hi(var8009da60)
-/*  f0aec08:	3c10800a */ 	lui	$s0,%hi(var8009d510)
+/*  f0aec08:	3c10800a */ 	lui	$s0,%hi(g_Casings)
 /*  f0aec0c:	2631da60 */ 	addiu	$s1,$s1,%lo(var8009da60)
-/*  f0aec10:	2610d510 */ 	addiu	$s0,$s0,%lo(var8009d510)
+/*  f0aec10:	2610d510 */ 	addiu	$s0,$s0,%lo(g_Casings)
 /*  f0aec14:	8e0f0040 */ 	lw	$t7,0x40($s0)
 .L0f0aec18:
 /*  f0aec18:	02002025 */ 	or	$a0,$s0,$zero
diff --git a/src/gvars/gvars.c b/src/gvars/gvars.c
index f45666a4a..4e8a1b318 100644
--- a/src/gvars/gvars.c
+++ b/src/gvars/gvars.c
@@ -14367,7 +14367,7 @@ struct tag **g_TagPtrs = 0;
 
 u32 var8009d0cc = 0;
 u32 var8009d0d0[2] = {0};
-u32 var8009d0d8 = 0;
+s32 var8009d0d8 = 0;
 u32 var8009d0dc = 0;
 u32 var8009d0e0[4] = {0};
 u32 var8009d0f0 = 0;
@@ -14395,7 +14395,7 @@ u32 var8009d144 = 0;
 u32 var8009d148 = 0;
 u32 var8009d14c = 0;
 struct fireslot g_Fireslots[NUM_FIRESLOTS] = {0};
-struct var8009d510 var8009d510[20] = {0};
+struct casing g_Casings[20] = {0};
 struct var8009da60 var8009da60[8] = {0};
 struct var8009dbe0 var8009dbe0[4] = {0};
 u32 var8009dd00 = 0;
diff --git a/src/include/game/data/data_0160b0.h b/src/include/game/data/data_0160b0.h
index 7bb7264f8..5726987c4 100644
--- a/src/include/game/data/data_0160b0.h
+++ b/src/include/game/data/data_0160b0.h
@@ -38,7 +38,7 @@ extern struct ammotype g_AmmoTypes[33];
 extern u32 var80070500;
 extern u32 var8007050c;
 extern u32 var80070518;
-extern s32 var80070524;
+extern s32 g_CasingsActive;
 extern u32 var80070528;
 extern u32 var80070534;
 extern u32 var80070574;
diff --git a/src/include/game/game_010b20.h b/src/include/game/game_010b20.h
index 71702d278..f77129267 100644
--- a/src/include/game/game_010b20.h
+++ b/src/include/game/game_010b20.h
@@ -3,7 +3,7 @@
 #include <ultra64.h>
 #include "types.h"
 
-void func0f010b20(void);
+void casingsReset(void);
 void func0f010bb0(void);
 
 #endif
diff --git a/src/include/game/game_01d9f0.h b/src/include/game/game_01d9f0.h
index 3c566aaac..59256b07a 100644
--- a/src/include/game/game_01d9f0.h
+++ b/src/include/game/game_01d9f0.h
@@ -3,7 +3,7 @@
 #include <ultra64.h>
 #include "types.h"
 
-u32 func0f01d9f0(void);
-void func0f01dd6c(void);
+void casingTick(struct casing *arg0);
+void casingsTick(void);
 
 #endif
diff --git a/src/include/gvars/gvars.h b/src/include/gvars/gvars.h
index 78285398d..c6876a137 100644
--- a/src/include/gvars/gvars.h
+++ b/src/include/gvars/gvars.h
@@ -565,12 +565,12 @@ extern struct criteria_roomentered *g_RoomEnteredCriterias;
 extern struct criteria_multiroomentered *g_MultiroomEnteredCriterias;
 extern struct criteria_holograph *g_HolographCriterias;
 extern u32 var8009d0d0[2];
-extern u32 var8009d0d8;
+extern s32 var8009d0d8;
 extern u32 var8009d0e0[4];
 extern u32 var8009d0f0;
 extern u32 var8009d144;
 extern struct fireslot g_Fireslots[NUM_FIRESLOTS];
-extern struct var8009d510 var8009d510[20];
+extern struct casing g_Casings[20];
 extern struct var8009da60 var8009da60[8];
 extern struct var8009dbe0 var8009dbe0[4];
 extern u32 var8009dd00;
diff --git a/src/include/types.h b/src/include/types.h
index e69eed04b..4849eaa34 100644
--- a/src/include/types.h
+++ b/src/include/types.h
@@ -6036,7 +6036,7 @@ struct var800aa5d8 {
 	s16 unk18;
 };
 
-struct var8009d510 {
+struct casing {
 	/*0x00*/ u32 unk00;
 	/*0x04*/ u32 unk04;
 	/*0x08*/ u32 unk08;