union_room_battle

asm/union_room_battle.s

@@ -1,555 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start sub_811C04C
-sub_811C04C: @ 811C04C
-	push {r4-r7,lr}
-	movs r0, 0xA
-	bl sub_81173C0
-	movs r4, 0
-	movs r7, 0x64
-	ldr r6, _0811C0CC @ =gPlayerParty
-	ldr r5, _0811C0D0 @ =gEnemyParty
-_0811C05C:
-	ldr r0, _0811C0D4 @ =gSelectedOrderFromParty
-	adds r0, r4, r0
-	ldrb r0, [r0]
-	subs r0, 0x1
-	adds r1, r0, 0
-	muls r1, r7
-	adds r1, r6
-	adds r0, r5, 0
-	movs r2, 0x64
-	bl memcpy
-	adds r5, 0x64
-	adds r4, 0x1
-	cmp r4, 0x1
-	ble _0811C05C
-	ldr r4, _0811C0CC @ =gPlayerParty
-	movs r0, 0xFA
-	lsls r0, 1
-	adds r5, r4, r0
-_0811C082:
-	adds r0, r4, 0
-	bl ZeroMonData
-	adds r4, 0x64
-	cmp r4, r5
-	ble _0811C082
-	ldr r4, _0811C0CC @ =gPlayerParty
-	movs r5, 0
-	adds r6, r4, 0
-	adds r6, 0x64
-_0811C096:
-	ldr r1, _0811C0D0 @ =gEnemyParty
-	adds r1, r5, r1
-	adds r0, r4, 0
-	movs r2, 0x64
-	bl memcpy
-	adds r4, 0x64
-	adds r5, 0x64
-	cmp r4, r6
-	ble _0811C096
-	movs r0, 0x32
-	bl IncrementGameStat
-	bl CalculatePlayerPartyCount
-	ldr r0, _0811C0D8 @ =gTrainerBattleOpponent_A
-	movs r2, 0xC0
-	lsls r2, 4
-	adds r1, r2, 0
-	strh r1, [r0]
-	ldr r0, _0811C0DC @ =CB2_InitBattle
-	bl SetMainCallback2
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0811C0CC: .4byte gPlayerParty
-_0811C0D0: .4byte gEnemyParty
-_0811C0D4: .4byte gSelectedOrderFromParty
-_0811C0D8: .4byte gTrainerBattleOpponent_A
-_0811C0DC: .4byte CB2_InitBattle
-	thumb_func_end sub_811C04C
-
-	thumb_func_start sub_811C0E0
-sub_811C0E0: @ 811C0E0
-	push {r4-r6,lr}
-	mov r6, r10
-	mov r5, r9
-	mov r4, r8
-	push {r4-r6}
-	sub sp, 0x18
-	adds r5, r0, 0
-	mov r10, r1
-	adds r6, r2, 0
-	ldr r4, [sp, 0x34]
-	lsls r5, 24
-	lsrs r5, 24
-	lsls r6, 24
-	lsrs r6, 24
-	lsls r3, 24
-	lsrs r3, 24
-	movs r0, 0x1
-	mov r8, r0
-	ldr r1, _0811C14C @ =gUnknown_84571A8
-	mov r9, r1
-	ldrb r0, [r1]
-	lsls r1, r0, 4
-	orrs r1, r0
-	lsls r1, 24
-	lsrs r1, 24
-	adds r0, r5, 0
-	str r3, [sp, 0x14]
-	bl FillWindowPixelBuffer
-	mov r0, r8
-	str r0, [sp]
-	str r0, [sp, 0x4]
-	mov r1, r9
-	str r1, [sp, 0x8]
-	lsls r4, 24
-	asrs r4, 24
-	str r4, [sp, 0xC]
-	mov r0, r10
-	str r0, [sp, 0x10]
-	adds r0, r5, 0
-	movs r1, 0x3
-	adds r2, r6, 0
-	ldr r3, [sp, 0x14]
-	bl AddTextPrinterParameterized4
-	add sp, 0x18
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0811C14C: .4byte gUnknown_84571A8
-	thumb_func_end sub_811C0E0
-
-	thumb_func_start sub_811C150
-sub_811C150: @ 811C150
-	push {r4-r6,lr}
-	sub sp, 0x4
-	adds r4, r0, 0
-	adds r6, r1, 0
-	adds r5, r2, 0
-	movs r1, 0
-	ldrsh r0, [r4, r1]
-	cmp r0, 0
-	beq _0811C168
-	cmp r0, 0x1
-	beq _0811C196
-	b _0811C1AA
-_0811C168:
-	movs r0, 0
-	movs r1, 0x1
-	movs r2, 0xD
-	bl DrawTextBorderOuter
-	str r5, [sp]
-	movs r0, 0
-	adds r1, r6, 0
-	movs r2, 0
-	movs r3, 0x2
-	bl sub_811C0E0
-	movs r0, 0
-	bl PutWindowTilemap
-	movs r0, 0
-	movs r1, 0x3
-	bl CopyWindowToVram
-	ldrh r0, [r4]
-	adds r0, 0x1
-	strh r0, [r4]
-	b _0811C1AA
-_0811C196:
-	movs r0, 0
-	bl IsTextPrinterActive
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0
-	bne _0811C1AA
-	strh r0, [r4]
-	movs r0, 0x1
-	b _0811C1AC
-_0811C1AA:
-	movs r0, 0
-_0811C1AC:
-	add sp, 0x4
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_811C150
-
-	thumb_func_start sub_811C1B4
-sub_811C1B4: @ 811C1B4
-	push {lr}
-	bl LoadOam
-	bl ProcessSpriteCopyRequests
-	bl TransferPlttBuffer
-	pop {r0}
-	bx r0
-	thumb_func_end sub_811C1B4
-
-	thumb_func_start sub_811C1C8
-sub_811C1C8: @ 811C1C8
-	push {r4,lr}
-	sub sp, 0xC
-	ldr r1, _0811C1E8 @ =gMain
-	movs r2, 0x87
-	lsls r2, 3
-	adds r0, r1, r2
-	ldrb r0, [r0]
-	adds r2, r1, 0
-	cmp r0, 0x33
-	bls _0811C1DE
-	b _0811C516
-_0811C1DE:
-	lsls r0, 2
-	ldr r1, _0811C1EC @ =_0811C1F0
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_0811C1E8: .4byte gMain
-_0811C1EC: .4byte _0811C1F0
-	.align 2, 0
-_0811C1F0:
-	.4byte _0811C2C0
-	.4byte _0811C364
-	.4byte _0811C38C
-	.4byte _0811C3B0
-	.4byte _0811C400
-	.4byte _0811C516
-	.4byte _0811C4E4
-	.4byte _0811C4C0
-	.4byte _0811C4E4
-	.4byte _0811C500
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C516
-	.4byte _0811C48C
-	.4byte _0811C4A8
-_0811C2C0:
-	movs r0, 0
-	movs r1, 0
-	bl SetGpuReg
-	ldr r4, _0811C350 @ =gUnknown_203B08C
-	movs r0, 0x4
-	bl AllocZeroed
-	str r0, [r4]
-	bl ResetSpriteData
-	bl FreeAllSpritePalettes
-	bl ResetTasks
-	movs r0, 0
-	bl ResetBgsAndClearDma3BusyFlags
-	ldr r1, _0811C354 @ =gUnknown_8457194
-	movs r0, 0
-	movs r2, 0x1
-	bl InitBgsFromTemplates
-	bl ResetTempTileDataBuffers
-	ldr r0, _0811C358 @ =gUnknown_8457198
-	bl InitWindows
-	lsls r0, 16
-	cmp r0, 0
-	bne _0811C300
-	b _0811C52A
-_0811C300:
-	bl DeactivateAllTextPrinters
-	movs r0, 0
-	bl ClearWindowTilemap
-	movs r0, 0
-	movs r1, 0
-	bl FillWindowPixelBuffer
-	movs r0, 0
-	movs r1, 0x11
-	bl FillWindowPixelBuffer
-	movs r0, 0x1E
-	str r0, [sp]
-	movs r0, 0x14
-	str r0, [sp, 0x4]
-	movs r0, 0xF
-	str r0, [sp, 0x8]
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0
-	movs r3, 0
-	bl FillBgTilemapBufferRect
-	movs r0, 0
-	movs r1, 0x1
-	movs r2, 0xD0
-	bl TextWindow_SetStdFrame0_WithPal
-	bl Menu_LoadStdPal
-	ldr r0, _0811C35C @ =sub_811C1B4
-	bl SetVBlankCallback
-	ldr r1, _0811C360 @ =gMain
-	movs r0, 0x87
-	lsls r0, 3
-	adds r1, r0
-	b _0811C4F2
-	.align 2, 0
-_0811C350: .4byte gUnknown_203B08C
-_0811C354: .4byte gUnknown_8457194
-_0811C358: .4byte gUnknown_8457198
-_0811C35C: .4byte sub_811C1B4
-_0811C360: .4byte gMain
-_0811C364:
-	ldr r0, _0811C380 @ =gUnknown_203B08C
-	ldr r0, [r0]
-	ldr r1, _0811C384 @ =gUnknown_841E538
-	movs r2, 0
-	bl sub_811C150
-	cmp r0, 0
-	bne _0811C376
-	b _0811C516
-_0811C376:
-	ldr r1, _0811C388 @ =gMain
-	movs r2, 0x87
-	lsls r2, 3
-	adds r1, r2
-	b _0811C4F2
-	.align 2, 0
-_0811C380: .4byte gUnknown_203B08C
-_0811C384: .4byte gUnknown_841E538
-_0811C388: .4byte gMain
-_0811C38C:
-	movs r0, 0x1
-	negs r0, r0
-	movs r1, 0
-	str r1, [sp]
-	movs r2, 0x10
-	movs r3, 0
-	bl BeginNormalPaletteFade
-	movs r0, 0
-	bl ShowBg
-	ldr r1, _0811C3AC @ =gMain
-	movs r0, 0x87
-	lsls r0, 3
-	adds r1, r0
-	b _0811C4F2
-	.align 2, 0
-_0811C3AC: .4byte gMain
-_0811C3B0:
-	bl UpdatePaletteFade
-	lsls r0, 24
-	cmp r0, 0
-	beq _0811C3BC
-	b _0811C516
-_0811C3BC:
-	ldr r4, _0811C3D8 @ =gBlockSendBuffer
-	adds r0, r4, 0
-	movs r1, 0
-	movs r2, 0x20
-	bl memset
-	ldr r0, _0811C3DC @ =gSelectedOrderFromParty
-	ldrb r1, [r0]
-	ldrb r0, [r0, 0x1]
-	cmn r1, r0
-	bne _0811C3E0
-	movs r0, 0x52
-	b _0811C3E2
-	.align 2, 0
-_0811C3D8: .4byte gBlockSendBuffer
-_0811C3DC: .4byte gSelectedOrderFromParty
-_0811C3E0:
-	movs r0, 0x51
-_0811C3E2:
-	strb r0, [r4]
-	ldr r1, _0811C3F8 @ =gBlockSendBuffer
-	movs r0, 0
-	movs r2, 0x20
-	bl SendBlock
-	ldr r1, _0811C3FC @ =gMain
-	movs r2, 0x87
-	lsls r2, 3
-	adds r1, r2
-	b _0811C4F2
-	.align 2, 0
-_0811C3F8: .4byte gBlockSendBuffer
-_0811C3FC: .4byte gMain
-_0811C400:
-	bl GetBlockReceivedStatus
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x3
-	beq _0811C40E
-	b _0811C516
-_0811C40E:
-	ldr r1, _0811C440 @ =gBlockRecvBuffer
-	ldrh r0, [r1]
-	cmp r0, 0x51
-	bne _0811C448
-	movs r2, 0x80
-	lsls r2, 1
-	adds r0, r1, r2
-	ldrh r0, [r0]
-	cmp r0, 0x51
-	bne _0811C448
-	movs r0, 0x1
-	negs r0, r0
-	movs r1, 0
-	str r1, [sp]
-	movs r2, 0
-	movs r3, 0x10
-	bl BeginNormalPaletteFade
-	ldr r0, _0811C444 @ =gMain
-	movs r1, 0x87
-	lsls r1, 3
-	adds r0, r1
-	movs r1, 0x32
-	b _0811C47E
-	.align 2, 0
-_0811C440: .4byte gBlockRecvBuffer
-_0811C444: .4byte gMain
-_0811C448:
-	bl sub_800AAC0
-	ldr r4, _0811C46C @ =gBlockRecvBuffer
-	bl GetMultiplayerId
-	lsls r0, 24
-	lsrs r0, 16
-	adds r0, r4
-	ldrh r0, [r0]
-	cmp r0, 0x52
-	bne _0811C474
-	ldr r0, _0811C470 @ =gMain
-	movs r2, 0x87
-	lsls r2, 3
-	adds r0, r2
-	movs r1, 0x6
-	b _0811C47E
-	.align 2, 0
-_0811C46C: .4byte gBlockRecvBuffer
-_0811C470: .4byte gMain
-_0811C474:
-	ldr r0, _0811C488 @ =gMain
-	movs r1, 0x87
-	lsls r1, 3
-	adds r0, r1
-	movs r1, 0x8
-_0811C47E:
-	strb r1, [r0]
-	bl ResetBlockReceivedFlags
-	b _0811C516
-	.align 2, 0
-_0811C488: .4byte gMain
-_0811C48C:
-	bl UpdatePaletteFade
-	lsls r0, 24
-	cmp r0, 0
-	bne _0811C516
-	bl sub_800AB9C
-	ldr r1, _0811C4A4 @ =gMain
-	movs r2, 0x87
-	lsls r2, 3
-	adds r1, r2
-	b _0811C4F2
-	.align 2, 0
-_0811C4A4: .4byte gMain
-_0811C4A8:
-	bl IsLinkTaskFinished
-	lsls r0, 24
-	cmp r0, 0
-	beq _0811C516
-	ldr r0, _0811C4BC @ =sub_811C04C
-	bl SetMainCallback2
-	b _0811C516
-	.align 2, 0
-_0811C4BC: .4byte sub_811C04C
-_0811C4C0:
-	ldr r0, _0811C4D8 @ =gUnknown_203B08C
-	ldr r0, [r0]
-	ldr r1, _0811C4DC @ =gUnknown_841E58D
-	movs r2, 0x1
-	bl sub_811C150
-	cmp r0, 0
-	beq _0811C516
-	ldr r0, _0811C4E0 @ =CB2_ReturnToField
-	bl SetMainCallback2
-	b _0811C516
-	.align 2, 0
-_0811C4D8: .4byte gUnknown_203B08C
-_0811C4DC: .4byte gUnknown_841E58D
-_0811C4E0: .4byte CB2_ReturnToField
-_0811C4E4:
-	ldr r0, _0811C4FC @ =gReceivedRemoteLinkPlayers
-	ldrb r0, [r0]
-	cmp r0, 0
-	bne _0811C516
-	movs r0, 0x87
-	lsls r0, 3
-	adds r1, r2, r0
-_0811C4F2:
-	ldrb r0, [r1]
-	adds r0, 0x1
-	strb r0, [r1]
-	b _0811C516
-	.align 2, 0
-_0811C4FC: .4byte gReceivedRemoteLinkPlayers
-_0811C500:
-	ldr r0, _0811C534 @ =gUnknown_203B08C
-	ldr r0, [r0]
-	ldr r1, _0811C538 @ =gUnknown_841E572
-	movs r2, 0x1
-	bl sub_811C150
-	cmp r0, 0
-	beq _0811C516
-	ldr r0, _0811C53C @ =CB2_ReturnToField
-	bl SetMainCallback2
-_0811C516:
-	bl RunTasks
-	bl RunTextPrinters
-	bl AnimateSprites
-	bl BuildOamBuffer
-	bl UpdatePaletteFade
-_0811C52A:
-	add sp, 0xC
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0811C534: .4byte gUnknown_203B08C
-_0811C538: .4byte gUnknown_841E572
-_0811C53C: .4byte CB2_ReturnToField
-	thumb_func_end sub_811C1C8
-
-	.align 2, 0 @ Don't pad with nop.

data/strings.s

@@ -4598,14 +4598,14 @@ gText_WhichMoveShouldBeForgotten:: @ 841E50C
 gUnknown_841E52D:: @ 0x841E52D
 	.string "----------$"
 
-gUnknown_841E538:: @ 841E538
+gText_CommStandbyAwaitingOtherPlayer:: @ 841E538
 	.string "Communication standby‥\n"
 	.string "Awaiting another player to choose.$"
 
-gUnknown_841E572:: @ 841E572
+gText_BattleWasRefused:: @ 841E572
 	.string "The battle was refused.{PAUSE 0x3C}$"
 
-gUnknown_841E58D:: @ 841E58D
+gText_RefusedBattle:: @ 841E58D
 	.string "Refused the battle.{PAUSE 0x3C}$"
 
 gFameCheckerText_MainScreenUI:: @ 841E5A4

data/union_room_battle.s

@@ -1,23 +0,0 @@
-#include "constants/region_map.h"
-#include "constants/flags.h"
-#include "constants/moves.h"
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-	.section .rodata
-	.align 2
-
-	.align 2
-gUnknown_8457194:: @ 8457194
-	.2byte 0x01FC, 0x0000 @ BgTemplate
-
-	.align 2
-gUnknown_8457198:: @ 8457198
-	.byte 0x00, 0x02, 0x0F, 0x1A, 0x04, 0x0E @ window template
-	.2byte 0x0014
-
-	.byte 0xFF, 0, 0, 0, 0, 0
-	.2byte 0x0000
-
-	.align 2
-gUnknown_84571A8:: @ 84571A8
-	.byte 0x01, 0x02, 0x03, 0x00

include/strings.h

@@ -1056,4 +1056,9 @@ extern const u8 gText_DepositHowManyStrVars1[];
 extern const u8 gText_DepositedStrVar2StrVar1s[];
 extern const u8 gText_NoRoomToStoreItems[];
 
+// union_room_battle
+extern const u8 gText_CommStandbyAwaitingOtherPlayer[];
+extern const u8 gText_RefusedBattle[];
+extern const u8 gText_BattleWasRefused[];
+
 #endif //GUARD_STRINGS_H

include/union_room.h

@@ -153,4 +153,6 @@ extern struct GFtgtGnameSub gUnknown_203B064;
 extern u16 gUnionRoomOfferedSpecies;
 extern u8 gUnionRoomRequestedMonType;
 
+void sub_81173C0(u16 battleFlags);
+
 #endif //GUARD_UNION_ROOM_H

ld_script.txt

@@ -243,7 +243,7 @@ SECTIONS {
         src/quest_log.o(.text);
         src/union_room.o(.text);
         src/rfu_union_tool.o(.text);
-        asm/union_room_battle.o(.text);
+        src/union_room_battle.o(.text);
         asm/pokemon_special_anim.o(.text);
         src/party_menu.o(.text);
         asm/union_room_chat.o(.text);
@@ -530,7 +530,7 @@ SECTIONS {
         src/quest_log.o(.rodata);
         src/union_room.o(.rodata);
         src/rfu_union_tool.o(.rodata);
-        data/union_room_battle.o(.rodata);
+        src/union_room_battle.o(.rodata);
         data/union_room_message.o(.rodata);
         data/pokemon_special_anim.o(.rodata);
         src/party_menu.o(.rodata);

src/union_room_battle.c

@@ -0,0 +1,225 @@
+#include "global.h"
+#include "bg.h"
+#include "battle.h"
+#include "gpu_regs.h"
+#include "link.h"
+#include "malloc.h"
+#include "menu.h"
+#include "new_menu_helpers.h"
+#include "overworld.h"
+#include "palette.h"
+#include "party_menu.h"
+#include "strings.h"
+#include "text_window.h"
+#include "union_room.h"
+#include "window.h"
+
+struct UnkStruct_203B08C
+{
+    s16 a0;
+};
+
+static EWRAM_DATA struct UnkStruct_203B08C * gUnknown_203B08C = NULL;
+
+static const struct BgTemplate gUnknown_8457194[] = {
+    {
+        .bg = 0,
+        .charBaseIndex = 3,
+        .mapBaseIndex = 31
+    }
+};
+
+static const struct WindowTemplate gUnknown_8457198[] = {
+    {
+        .bg = 0,
+        .tilemapLeft = 2,
+        .tilemapTop = 15,
+        .width = 26,
+        .height = 4,
+        .paletteNum = 14,
+        .baseBlock = 0x014
+    }, DUMMY_WIN_TEMPLATE
+};
+
+static const u8 gUnknown_84571A8[] = {1, 2, 3};
+
+static void sub_811C04C(void)
+{
+    s32 i;
+    sub_81173C0(BATTLE_TYPE_LINK | BATTLE_TYPE_TRAINER);
+    for (i = 0; i < 2; i++)
+    {
+        gEnemyParty[i] = gPlayerParty[gSelectedOrderFromParty[i] - 1];
+    }
+    for (i = 0; i < 6; i++)
+    {
+        ZeroMonData(&gPlayerParty[i]);
+    }
+    for (i = 0; i < 2; i++)
+    {
+        gPlayerParty[i] = gEnemyParty[i];
+    }
+    IncrementGameStat(GAME_STAT_NUM_UNION_ROOM_BATTLES);
+    CalculatePlayerPartyCount();
+    gTrainerBattleOpponent_A = TRAINER_OPPONENT_C00;
+    SetMainCallback2(CB2_InitBattle);
+}
+
+static void sub_811C0E0(u8 windowId, const u8 * str, u8 x, u8 y, s32 speed)
+{
+    s32 letterSpacing = 1;
+    s32 lineSpacing = 1;
+    FillWindowPixelBuffer(windowId, PIXEL_FILL(gUnknown_84571A8[0]));
+    AddTextPrinterParameterized4(windowId, 3, x, y, letterSpacing, lineSpacing, gUnknown_84571A8, speed, str);
+}
+
+static bool32 sub_811C150(s16 * state, const u8 * str, s32 speed)
+{
+    switch (*state)
+    {
+    case 0:
+        DrawTextBorderOuter(0, 0x001, 0xD);
+        sub_811C0E0(0, str, 0, 2, speed);
+        PutWindowTilemap(0);
+        CopyWindowToVram(0, 3);
+        (*state)++;
+        break;
+    case 1:
+        if (!IsTextPrinterActive(0))
+        {
+            *state = 0;
+            return TRUE;
+        }
+        break;
+    }
+    return FALSE;
+}
+
+static void sub_811C1B4(void)
+{
+    LoadOam();
+    ProcessSpriteCopyRequests();
+    TransferPlttBuffer();
+}
+
+void sub_811C1C8(void)
+{
+    switch (gMain.state)
+    {
+    case 0:
+        SetGpuReg(REG_OFFSET_DISPCNT, 0x0000);
+        gUnknown_203B08C = AllocZeroed(sizeof(struct UnkStruct_203B08C));
+        ResetSpriteData();
+        FreeAllSpritePalettes();
+        ResetTasks();
+        ResetBgsAndClearDma3BusyFlags(0);
+        InitBgsFromTemplates(0, gUnknown_8457194, 1);
+        ResetTempTileDataBuffers();
+        if (!InitWindows(gUnknown_8457198))
+        {
+            return;
+        }
+        DeactivateAllTextPrinters();
+        ClearWindowTilemap(0);
+        FillWindowPixelBuffer(0, 0x00);
+        FillWindowPixelBuffer(0, 0x11);
+        FillBgTilemapBufferRect(0, 0, 0, 0, 30, 20, 0xF);
+        TextWindow_SetStdFrame0_WithPal(0, 1, 0xD0);
+        Menu_LoadStdPal();
+        SetVBlankCallback(sub_811C1B4);
+        gMain.state++;
+        break;
+    case 1:
+        if (sub_811C150(&gUnknown_203B08C->a0, gText_CommStandbyAwaitingOtherPlayer, 0))
+        {
+            gMain.state++;
+        }
+        break;
+    case 2:
+        BeginNormalPaletteFade(0xFFFFFFFF, 0, 16, 0, 0);
+        ShowBg(0);
+        gMain.state++;
+        break;
+    case 3:
+        if (!UpdatePaletteFade())
+        {
+            memset(gBlockSendBuffer, 0, 0x20);
+            if (gSelectedOrderFromParty[0] == -gSelectedOrderFromParty[1])
+            {
+                gBlockSendBuffer[0] = 0x52;
+            }
+            else
+            {
+                gBlockSendBuffer[0] = 0x51;
+            }
+            SendBlock(0, gBlockSendBuffer, 0x20);
+            gMain.state++;
+        }
+        break;
+    case 4:
+        if (GetBlockReceivedStatus() == 3)
+        {
+            if (gBlockRecvBuffer[0][0] == 0x51 && gBlockRecvBuffer[1][0] == 0x51)
+            {
+                BeginNormalPaletteFade(0xFFFFFFFF, 0, 0, 16, 0);
+                gMain.state = 50;
+            }
+            else
+            {
+                sub_800AAC0();
+                if (gBlockRecvBuffer[GetMultiplayerId()][0] == 0x52)
+                {
+                    gMain.state = 6;
+                }
+                else
+                {
+                    gMain.state = 8;
+                }
+            }
+            ResetBlockReceivedFlags();
+        }
+        break;
+    case 50:
+        if (!UpdatePaletteFade())
+        {
+            sub_800AB9C();
+            gMain.state++;
+        }
+        break;
+    case 51:
+        if (IsLinkTaskFinished())
+        {
+            SetMainCallback2(sub_811C04C);
+        }
+        break;
+    case 6:
+        if (gReceivedRemoteLinkPlayers == 0)
+        {
+            gMain.state++;
+        }
+        break;
+    case 7:
+        if (sub_811C150(&gUnknown_203B08C->a0, gText_RefusedBattle, 1))
+        {
+            SetMainCallback2(CB2_ReturnToField);
+        }
+        break;
+    case 8:
+        if (gReceivedRemoteLinkPlayers == 0)
+        {
+            gMain.state++;
+        }
+        break;
+    case 9:
+        if (sub_811C150(&gUnknown_203B08C->a0, gText_BattleWasRefused, 1))
+        {
+            SetMainCallback2(CB2_ReturnToField);
+        }
+        break;
+    }
+    RunTasks();
+    RunTextPrinters();
+    AnimateSprites();
+    BuildOamBuffer();
+    UpdatePaletteFade();
+}

sym_ewram.txt

@@ -354,11 +354,10 @@ gUnknown_203ACF0: @ 203ACF0
 	.include "src/union_room.o"
 	.align 2
 	.include "src/rfu_union_tool.o"
+	.align 2
+	.include "src/union_room_battle.o"
 
 	.align 2
-gUnknown_203B08C: @ 203B08C
-	.space 0x4
-
 gUnknown_203B090: @ 203B090
 	.space 0x4