diff --git a/asm/union_room.s b/asm/union_room.s
index 6aefe7ce3..e227323e1 100755
--- a/asm/union_room.s
+++ b/asm/union_room.s
@@ -5,275 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_8017178
-sub_8017178: @ 8017178
-	push {r4-r7,lr}
-	mov r7, r9
-	mov r6, r8
-	push {r6,r7}
-	sub sp, 0x8
-	adds r7, r0, 0
-	adds r5, r1, 0
-	mov r9, r2
-	ldrb r4, [r7]
-	cmp r4, 0
-	beq _08017194
-	cmp r4, 0x1
-	beq _08017228
-	b _0801728E
-_08017194:
-	ldr r0, [r3]
-	ldr r1, [r3, 0x4]
-	str r0, [sp]
-	str r1, [sp, 0x4]
-	ldr r0, [sp, 0x24]
-	bl sub_81DB41C
-	adds r1, r0, 0
-	ldr r2, [sp]
-	lsrs r0, r2, 24
-	cmp r0, r1
-	ble _080171B6
-	lsls r1, 24
-	ldr r0, =0x00ffffff
-	ands r0, r2
-	orrs r0, r1
-	str r0, [sp]
-_080171B6:
-	ldr r2, [sp]
-	lsrs r0, r2, 8
-	lsls r0, 24
-	lsrs r0, 24
-	lsrs r1, r2, 24
-	adds r0, r1
-	cmp r0, 0x1D
-	ble _080171DC
-	movs r0, 0x1D
-	subs r0, r1
-	cmp r0, 0
-	bge _080171D0
-	movs r0, 0
-_080171D0:
-	lsls r1, r0, 24
-	lsrs r1, 16
-	ldr r0, =0xffff00ff
-	ands r0, r2
-	orrs r0, r1
-	str r0, [sp]
-_080171DC:
-	mov r0, sp
-	bl AddWindow
-	strb r0, [r5]
-	ldrb r0, [r5]
-	movs r1, 0
-	bl DrawStdWindowFrame
-	ldr r0, =gMultiuseListMenuTemplate
-	adds r2, r0, 0
-	ldr r1, [sp, 0x24]
-	ldm r1!, {r3,r4,r6}
-	stm r2!, {r3,r4,r6}
-	ldm r1!, {r3,r4,r6}
-	stm r2!, {r3,r4,r6}
-	ldrb r1, [r5]
-	strb r1, [r0, 0x10]
-	movs r1, 0
-	movs r2, 0
-	bl ListMenuInit
-	mov r1, r9
-	strb r0, [r1]
-	ldrb r0, [r5]
-	movs r1, 0x1
-	bl CopyWindowToVram
-	ldrb r0, [r7]
-	adds r0, 0x1
-	strb r0, [r7]
-	b _0801728E
-	.pool
-_08017228:
-	mov r3, r9
-	ldrb r0, [r3]
-	bl ListMenu_ProcessInput
-	mov r8, r0
-	ldr r0, =gMain
-	ldrh r1, [r0, 0x2E]
-	ands r4, r1
-	cmp r4, 0
-	beq _08017264
-	mov r4, r9
-	ldrb r0, [r4]
-	movs r1, 0
-	movs r2, 0
-	bl DestroyListMenuTask
-	ldrb r0, [r5]
-	movs r1, 0x1
-	bl ClearStdWindowAndFrame
-	ldrb r0, [r5]
-	bl RemoveWindow
-	movs r0, 0
-	strb r0, [r7]
-	mov r0, r8
-	b _08017292
-	.pool
-_08017264:
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	beq _0801728E
-	mov r6, r9
-	ldrb r0, [r6]
-	movs r1, 0
-	movs r2, 0
-	bl DestroyListMenuTask
-	ldrb r0, [r5]
-	movs r1, 0x1
-	bl ClearStdWindowAndFrame
-	ldrb r0, [r5]
-	bl RemoveWindow
-	strb r4, [r7]
-	movs r0, 0x2
-	negs r0, r0
-	b _08017292
-_0801728E:
-	movs r0, 0x1
-	negs r0, r0
-_08017292:
-	add sp, 0x8
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8017178
-
-	thumb_func_start sub_80172A0
-sub_80172A0: @ 80172A0
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	adds r5, r0, 0
-	adds r6, r1, 0
-	mov r10, r2
-	mov r9, r3
-	ldrb r4, [r5]
-	cmp r4, 0x1
-	beq _0801730C
-	cmp r4, 0x1
-	bgt _080172C2
-	cmp r4, 0
-	beq _080172C8
-	b _0801739C
-_080172C2:
-	cmp r4, 0x2
-	beq _0801731C
-	b _0801739C
-_080172C8:
-	ldr r0, =gUnknown_082F0344
-	bl sub_8017118
-	mov r1, r9
-	strb r0, [r1]
-	ldr r0, [sp, 0x20]
-	bl AddWindow
-	strb r0, [r6]
-	ldrb r0, [r6]
-	movs r1, 0
-	bl DrawStdWindowFrame
-	ldr r0, =gMultiuseListMenuTemplate
-	adds r2, r0, 0
-	ldr r1, [sp, 0x24]
-	ldm r1!, {r3,r4,r7}
-	stm r2!, {r3,r4,r7}
-	ldm r1!, {r3,r4,r7}
-	stm r2!, {r3,r4,r7}
-	ldrb r1, [r6]
-	strb r1, [r0, 0x10]
-	movs r1, 0
-	movs r2, 0x1
-	bl ListMenuInit
-	mov r1, r10
-	strb r0, [r1]
-	b _08017314
-	.pool
-_0801730C:
-	ldrb r0, [r6]
-	movs r1, 0x1
-	bl CopyWindowToVram
-_08017314:
-	ldrb r0, [r5]
-	adds r0, 0x1
-	strb r0, [r5]
-	b _0801739C
-_0801731C:
-	mov r3, r10
-	ldrb r0, [r3]
-	bl ListMenu_ProcessInput
-	adds r1, r0, 0
-	ldr r0, =gMain
-	ldrh r2, [r0, 0x2E]
-	movs r0, 0x3
-	ands r0, r2
-	cmp r0, 0
-	beq _0801739C
-	cmp r1, 0x8
-	beq _0801733E
-	ands r4, r2
-	mov r8, r4
-	cmp r4, 0
-	beq _08017368
-_0801733E:
-	mov r4, r10
-	ldrb r0, [r4]
-	movs r1, 0
-	movs r2, 0
-	bl DestroyListMenuTask
-	ldrb r0, [r6]
-	bl RemoveWindow
-	mov r7, r9
-	ldrb r0, [r7]
-	bl sub_8017168
-	movs r0, 0
-	strb r0, [r5]
-	movs r0, 0x2
-	negs r0, r0
-	b _080173A0
-	.pool
-_08017368:
-	ldr r0, [sp, 0x28]
-	bl sub_8017CB0
-	adds r4, r0, 0
-	cmp r4, 0
-	blt _08017396
-	mov r1, r10
-	ldrb r0, [r1]
-	movs r1, 0
-	movs r2, 0
-	bl DestroyListMenuTask
-	ldrb r0, [r6]
-	bl RemoveWindow
-	mov r3, r9
-	ldrb r0, [r3]
-	bl sub_8017168
-	mov r7, r8
-	strb r7, [r5]
-	adds r0, r4, 0
-	b _080173A0
-_08017396:
-	movs r0, 0x7
-	bl PlaySE
-_0801739C:
-	movs r0, 0x1
-	negs r0, r0
-_080173A0:
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80172A0
-
 	thumb_func_start sub_80173B0
 sub_80173B0: @ 80173B0
 	push {lr}
diff --git a/src/union_room.c b/src/union_room.c
index 0eb419401..90631dab4 100644
--- a/src/union_room.c
+++ b/src/union_room.c
@@ -34,6 +34,7 @@
 #include "data2.h"
 #include "field_screen_effect.h"
 #include "script_pokemon_util_80F87D8.h"
+#include "international_string_util.h"
 #include "mevent.h"
 
 struct UnkStruct_Shared
@@ -264,6 +265,7 @@ void sub_801818C(bool32 arg0);
 void sub_801A3D0(u32 arg0, u32 arg1, struct UnkStruct_Main0 *arg2);
 s32 sub_8017178(u8 *arg0, u8 *arg1, u8 *arg2, const struct WindowTemplate *winTemplate, const struct ListMenuTemplate *menuTemplate);
 s32 sub_80172A0(u8 *arg0, u8 *arg1, u8 *arg2, u8 *arg3, const struct WindowTemplate *winTemplate, const struct ListMenuTemplate *menuTemplate, struct UnkStruct_Main0 *arg6);
+s32 sub_8017CB0(struct UnkStruct_Main0 * arg);
 bool32 sub_8018024(void);
 u32 sub_8017984(u32 arg0);
 void sub_8018220(u8 *unused, struct UnkStruct_URoom *arg1, bool8 arg2);
@@ -346,6 +348,7 @@ extern const struct WindowTemplate gUnknown_082F017C;
 extern const struct WindowTemplate gUnknown_082F021C;
 extern const struct WindowTemplate gUnknown_082F025C;
 extern const struct WindowTemplate gUnknown_082F0294;
+extern const struct WindowTemplate gUnknown_082F0344;
 extern const struct WindowTemplate gUnknown_082F034C;
 
 extern const struct ListMenuTemplate gUnknown_082F015C;
@@ -3678,7 +3681,7 @@ s8 sub_80170B8(u8 *arg0, bool32 arg1)
     return -2;
 }
 
-u8 sub_8017118(struct WindowTemplate * template)
+u8 sub_8017118(const struct WindowTemplate * template)
 {
     u8 windowId = AddWindow(template);
     DrawStdWindowFrame(windowId, FALSE);
@@ -3693,3 +3696,241 @@ void sub_8017168(u8 windowId)
 {
     RemoveWindow(windowId);
 }
+
+s32 sub_8017178(u8 *arg0, u8 *arg1, u8 *arg2, const struct WindowTemplate *winTemplate, const struct ListMenuTemplate *menuTemplate)
+{
+    s32 r1, r8;
+    struct WindowTemplate winTemplateCopy;
+
+    switch (*arg0)
+    {
+    case 0:
+        winTemplateCopy = *winTemplate;
+        r1 = sub_81DB41C(menuTemplate);
+        if (winTemplateCopy.width > r1)
+        {
+            winTemplateCopy.width = r1;
+        }
+        if (winTemplateCopy.tilemapLeft + winTemplateCopy.width > 29)
+        {
+            winTemplateCopy.tilemapLeft = max(29 - winTemplateCopy.width, 0);
+        }
+        *arg1 = AddWindow(&winTemplateCopy);
+        DrawStdWindowFrame(*arg1, FALSE);
+        gMultiuseListMenuTemplate = *menuTemplate;
+        gMultiuseListMenuTemplate.windowId = *arg1;
+        *arg2 = ListMenuInit(&gMultiuseListMenuTemplate, 0, 0);
+        CopyWindowToVram(*arg1, TRUE);
+        (*arg0)++;
+        break;
+    case 1:
+        r8 = ListMenu_ProcessInput(*arg2);
+        if (({gMain.newKeys & A_BUTTON;}))
+        {
+            DestroyListMenuTask(*arg2, NULL, NULL);
+            ClearStdWindowAndFrame(*arg1, TRUE);
+            RemoveWindow(*arg1);
+            *arg0 = 0;
+            return r8;
+        }
+        else if (({gMain.newKeys & B_BUTTON;}))
+        {
+            DestroyListMenuTask(*arg2, NULL, NULL);
+            ClearStdWindowAndFrame(*arg1, TRUE);
+            RemoveWindow(*arg1);
+            *arg0 = 0;
+            return -2;
+        }
+        break;
+    }
+
+    return -1;
+}
+
+#ifdef NONMATCHING
+s32 sub_80172A0(u8 *arg0, u8 *arg1, u8 *arg2, u8 *arg3, const struct WindowTemplate *winTemplate, const struct ListMenuTemplate *menuTemplate, struct UnkStruct_Main0 *arg6)
+{
+    s32 input;
+    s32 r4;
+
+    switch (*arg0)
+    {
+    case 0:
+        *arg3 = sub_8017118(&gUnknown_082F0344);
+        *arg1 = AddWindow(winTemplate);
+        DrawStdWindowFrame(*arg1, FALSE);
+        gMultiuseListMenuTemplate = *menuTemplate;
+        gMultiuseListMenuTemplate.windowId = *arg1;
+        *arg2 = ListMenuInit(&gMultiuseListMenuTemplate, 0, 1);
+        (*arg0)++;
+        break;
+    case 1:
+        CopyWindowToVram(*arg1, TRUE);
+        (*arg0)++;
+        break;
+    case 2:
+        // Register swap r1 <---> r2
+        input = ListMenu_ProcessInput(*arg2);
+        if (({gMain.newKeys & (A_BUTTON | B_BUTTON);}))
+        {
+            if (input == 8 || ({gMain.newKeys & B_BUTTON;}))
+            {
+                DestroyListMenuTask(*arg2, NULL, NULL);
+                RemoveWindow(*arg1);
+                sub_8017168(*arg3);
+                *arg0 = 0;
+                return -2;
+            }
+            else
+            {
+                r4 = sub_8017CB0(arg6);
+                if (r4 >= 0)
+                {
+                    DestroyListMenuTask(*arg2, NULL, NULL);
+                    RemoveWindow(*arg1);
+                    sub_8017168(*arg3);
+                    *arg0 = 0;
+                    return r4;
+                }
+                else
+                {
+                    PlaySE(SE_WALL_HIT);
+                }
+            }
+        }
+        break;
+    }
+
+    return -1;
+}
+#else
+NAKED
+s32 sub_80172A0(u8 *arg0, u8 *arg1, u8 *arg2, u8 *arg3, const struct WindowTemplate *winTemplate, const struct ListMenuTemplate *menuTemplate, struct UnkStruct_Main0 *arg6)
+{
+    asm_unified("\tpush {r4-r7,lr}\n"
+                "\tmov r7, r10\n"
+                "\tmov r6, r9\n"
+                "\tmov r5, r8\n"
+                "\tpush {r5-r7}\n"
+                "\tadds r5, r0, 0\n"
+                "\tadds r6, r1, 0\n"
+                "\tmov r10, r2\n"
+                "\tmov r9, r3\n"
+                "\tldrb r4, [r5]\n"
+                "\tcmp r4, 0x1\n"
+                "\tbeq _0801730C\n"
+                "\tcmp r4, 0x1\n"
+                "\tbgt _080172C2\n"
+                "\tcmp r4, 0\n"
+                "\tbeq _080172C8\n"
+                "\tb _0801739C\n"
+                "_080172C2:\n"
+                "\tcmp r4, 0x2\n"
+                "\tbeq _0801731C\n"
+                "\tb _0801739C\n"
+                "_080172C8:\n"
+                "\tldr r0, =gUnknown_082F0344\n"
+                "\tbl sub_8017118\n"
+                "\tmov r1, r9\n"
+                "\tstrb r0, [r1]\n"
+                "\tldr r0, [sp, 0x20]\n"
+                "\tbl AddWindow\n"
+                "\tstrb r0, [r6]\n"
+                "\tldrb r0, [r6]\n"
+                "\tmovs r1, 0\n"
+                "\tbl DrawStdWindowFrame\n"
+                "\tldr r0, =gMultiuseListMenuTemplate\n"
+                "\tadds r2, r0, 0\n"
+                "\tldr r1, [sp, 0x24]\n"
+                "\tldm r1!, {r3,r4,r7}\n"
+                "\tstm r2!, {r3,r4,r7}\n"
+                "\tldm r1!, {r3,r4,r7}\n"
+                "\tstm r2!, {r3,r4,r7}\n"
+                "\tldrb r1, [r6]\n"
+                "\tstrb r1, [r0, 0x10]\n"
+                "\tmovs r1, 0\n"
+                "\tmovs r2, 0x1\n"
+                "\tbl ListMenuInit\n"
+                "\tmov r1, r10\n"
+                "\tstrb r0, [r1]\n"
+                "\tb _08017314\n"
+                "\t.pool\n"
+                "_0801730C:\n"
+                "\tldrb r0, [r6]\n"
+                "\tmovs r1, 0x1\n"
+                "\tbl CopyWindowToVram\n"
+                "_08017314:\n"
+                "\tldrb r0, [r5]\n"
+                "\tadds r0, 0x1\n"
+                "\tstrb r0, [r5]\n"
+                "\tb _0801739C\n"
+                "_0801731C:\n"
+                "\tmov r3, r10\n"
+                "\tldrb r0, [r3]\n"
+                "\tbl ListMenu_ProcessInput\n"
+                "\tadds r1, r0, 0\n"
+                "\tldr r0, =gMain\n"
+                "\tldrh r2, [r0, 0x2E]\n"
+                "\tmovs r0, 0x3\n"
+                "\tands r0, r2\n"
+                "\tcmp r0, 0\n"
+                "\tbeq _0801739C\n"
+                "\tcmp r1, 0x8\n"
+                "\tbeq _0801733E\n"
+                "\tands r4, r2\n"
+                "\tmov r8, r4\n"
+                "\tcmp r4, 0\n"
+                "\tbeq _08017368\n"
+                "_0801733E:\n"
+                "\tmov r4, r10\n"
+                "\tldrb r0, [r4]\n"
+                "\tmovs r1, 0\n"
+                "\tmovs r2, 0\n"
+                "\tbl DestroyListMenuTask\n"
+                "\tldrb r0, [r6]\n"
+                "\tbl RemoveWindow\n"
+                "\tmov r7, r9\n"
+                "\tldrb r0, [r7]\n"
+                "\tbl sub_8017168\n"
+                "\tmovs r0, 0\n"
+                "\tstrb r0, [r5]\n"
+                "\tmovs r0, 0x2\n"
+                "\tnegs r0, r0\n"
+                "\tb _080173A0\n"
+                "\t.pool\n"
+                "_08017368:\n"
+                "\tldr r0, [sp, 0x28]\n"
+                "\tbl sub_8017CB0\n"
+                "\tadds r4, r0, 0\n"
+                "\tcmp r4, 0\n"
+                "\tblt _08017396\n"
+                "\tmov r1, r10\n"
+                "\tldrb r0, [r1]\n"
+                "\tmovs r1, 0\n"
+                "\tmovs r2, 0\n"
+                "\tbl DestroyListMenuTask\n"
+                "\tldrb r0, [r6]\n"
+                "\tbl RemoveWindow\n"
+                "\tmov r3, r9\n"
+                "\tldrb r0, [r3]\n"
+                "\tbl sub_8017168\n"
+                "\tmov r7, r8\n"
+                "\tstrb r7, [r5]\n"
+                "\tadds r0, r4, 0\n"
+                "\tb _080173A0\n"
+                "_08017396:\n"
+                "\tmovs r0, 0x7\n"
+                "\tbl PlaySE\n"
+                "_0801739C:\n"
+                "\tmovs r0, 0x1\n"
+                "\tnegs r0, r0\n"
+                "_080173A0:\n"
+                "\tpop {r3-r5}\n"
+                "\tmov r8, r3\n"
+                "\tmov r9, r4\n"
+                "\tmov r10, r5\n"
+                "\tpop {r4-r7}\n"
+                "\tpop {r1}\n"
+                "\tbx r1");
+}
+#endif