through sub_8116738

3 files changed, 275 insertions, 677 deletions

diff --git a/asm/union_room.s b/asm/union_room.s
index 1cd5db1e2..6e32c7afd 100644
--- a/asm/union_room.s
+++ b/asm/union_room.s
@@ -5,683 +5,6 @@
 
 	.text
 
-	thumb_func_start TryJoinLinkGroup
-TryJoinLinkGroup: @ 81166F4
-	push {lr}
-	ldr r0, _08116724 @ =sub_8116738
-	movs r1, 0
-	bl CreateTask
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r2, _08116728 @ =gUnknown_203B05C
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	ldr r0, _0811672C @ =gTasks+0x8
-	adds r1, r0
-	str r1, [r2]
-	ldr r0, _08116730 @ =gUnknown_3002028
-	str r1, [r0]
-	movs r0, 0
-	strb r0, [r1, 0x8]
-	strb r0, [r1, 0x9]
-	ldr r1, _08116734 @ =gSpecialVar_Result
-	strh r0, [r1]
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08116724: .4byte sub_8116738
-_08116728: .4byte gUnknown_203B05C
-_0811672C: .4byte gTasks+0x8
-_08116730: .4byte gUnknown_3002028
-_08116734: .4byte gSpecialVar_Result
-	thumb_func_end TryJoinLinkGroup
-
-	thumb_func_start sub_8116738
-sub_8116738: @ 8116738
-	push {r4-r7,lr}
-	sub sp, 0x8
-	lsls r0, 24
-	lsrs r4, r0, 24
-	ldr r0, _08116758 @ =gUnknown_203B05C
-	ldr r6, [r0]
-	ldrb r0, [r6, 0x8]
-	cmp r0, 0x17
-	bls _0811674C
-	b _08116D06
-_0811674C:
-	lsls r0, 2
-	ldr r1, _0811675C @ =_08116760
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_08116758: .4byte gUnknown_203B05C
-_0811675C: .4byte _08116760
-	.align 2, 0
-_08116760:
-	.4byte _081167C0
-	.4byte _0811680C
-	.4byte _08116838
-	.4byte _08116904
-	.4byte _08116D06
-	.4byte _081169B4
-	.4byte _08116A08
-	.4byte _08116B94
-	.4byte _08116BB0
-	.4byte _08116BFE
-	.4byte _08116C10
-	.4byte _08116C98
-	.4byte _08116C10
-	.4byte _08116C68
-	.4byte _08116C10
-	.4byte _08116CA8
-	.4byte _08116D06
-	.4byte _08116D06
-	.4byte _08116C10
-	.4byte _08116CC8
-	.4byte _08116C10
-	.4byte _08116CFC
-	.4byte _08116D06
-	.4byte _08116CEC
-_081167C0:
-	ldr r5, _08116800 @ =gUnknown_84570C8
-	ldr r4, _08116804 @ =gSpecialVar_0x8004
-	ldrh r0, [r4]
-	adds r0, r5
-	ldrb r0, [r0]
-	movs r1, 0
-	movs r2, 0
-	bl sub_80FAF58
-	ldr r1, _08116808 @ =gUnknown_203B058
-	ldrh r0, [r4]
-	adds r0, r5
-	ldrb r0, [r0]
-	strb r0, [r1]
-	bl sub_800B1F4
-	bl OpenLink
-	bl sub_80FBBD8
-	movs r0, 0x70
-	bl AllocZeroed
-	str r0, [r6, 0x4]
-	movs r0, 0x80
-	lsls r0, 2
-	bl AllocZeroed
-	str r0, [r6]
-	movs r0, 0x1
-	strb r0, [r6, 0x8]
-	b _08116D06
-	.align 2, 0
-_08116800: .4byte gUnknown_84570C8
-_08116804: .4byte gSpecialVar_0x8004
-_08116808: .4byte gUnknown_203B058
-_0811680C:
-	adds r0, r6, 0
-	adds r0, 0x9
-	ldr r2, _08116830 @ =gUnknown_84591B8
-	ldr r1, _08116834 @ =gSpecialVar_0x8004
-	ldrh r1, [r1]
-	lsls r1, 2
-	adds r1, r2
-	ldr r1, [r1]
-	bl sub_811A0F8
-	lsls r0, 24
-	cmp r0, 0
-	bne _08116828
-	b _08116D06
-_08116828:
-	movs r0, 0x2
-	strb r0, [r6, 0x8]
-	b _08116D06
-	.align 2, 0
-_08116830: .4byte gUnknown_84591B8
-_08116834: .4byte gSpecialVar_0x8004
-_08116838:
-	ldr r0, [r6, 0x4]
-	movs r1, 0x4
-	bl sub_811A650
-	ldr r0, [r6]
-	movs r1, 0x10
-	bl sub_811A5E4
-	ldr r0, [r6, 0x4]
-	ldr r1, _081168E8 @ =gSpecialVar_0x8004
-	ldrh r1, [r1]
-	bl sub_811A054
-	movs r4, 0
-	strb r0, [r6, 0x11]
-	ldr r0, _081168EC @ =gUnknown_8456CD0
-	bl AddWindow
-	strb r0, [r6, 0xC]
-	ldr r0, _081168F0 @ =gUnknown_8456D4C
-	bl AddWindow
-	strb r0, [r6, 0xB]
-	ldr r0, _081168F4 @ =gUnknown_8456D54
-	bl AddWindow
-	strb r0, [r6, 0xD]
-	ldrb r0, [r6, 0xC]
-	movs r1, 0x22
-	bl FillWindowPixelBuffer
-	ldrb r0, [r6, 0xC]
-	ldr r2, _081168F8 @ =gUnknown_8458FC8
-	movs r1, 0x2
-	str r1, [sp]
-	movs r1, 0x4
-	str r1, [sp, 0x4]
-	movs r1, 0
-	movs r3, 0x8
-	bl sub_811A444
-	ldrb r0, [r6, 0xC]
-	bl PutWindowTilemap
-	ldrb r0, [r6, 0xC]
-	movs r1, 0x2
-	bl CopyWindowToVram
-	ldrb r0, [r6, 0xB]
-	movs r1, 0
-	bl DrawStdWindowFrame
-	ldr r0, _081168FC @ =gMultiuseListMenuTemplate
-	adds r2, r0, 0
-	ldr r1, _08116900 @ =gUnknown_8456DDC
-	ldm r1!, {r3,r5,r7}
-	stm r2!, {r3,r5,r7}
-	ldm r1!, {r3,r5,r7}
-	stm r2!, {r3,r5,r7}
-	ldrb r1, [r6, 0xB]
-	strb r1, [r0, 0x10]
-	movs r1, 0
-	movs r2, 0
-	bl ListMenuInit
-	strb r0, [r6, 0xE]
-	ldrb r0, [r6, 0xD]
-	movs r1, 0
-	bl DrawStdWindowFrame
-	ldrb r0, [r6, 0xD]
-	bl PutWindowTilemap
-	ldrb r0, [r6, 0xD]
-	bl sub_8115924
-	ldrb r0, [r6, 0xD]
-	movs r1, 0x2
-	bl CopyWindowToVram
-	movs r0, 0
-	bl CopyBgTilemapBufferToVram
-	strb r4, [r6, 0xF]
-	movs r0, 0x3
-	strb r0, [r6, 0x8]
-	b _08116D06
-	.align 2, 0
-_081168E8: .4byte gSpecialVar_0x8004
-_081168EC: .4byte gUnknown_8456CD0
-_081168F0: .4byte gUnknown_8456D4C
-_081168F4: .4byte gUnknown_8456D54
-_081168F8: .4byte gUnknown_8458FC8
-_081168FC: .4byte gMultiuseListMenuTemplate
-_08116900: .4byte gUnknown_8456DDC
-_08116904:
-	bl sub_8116FE4
-	lsls r0, 24
-	lsrs r4, r0, 24
-	cmp r4, 0
-	beq _0811691E
-	cmp r4, 0x1
-	beq _08116916
-	b _08116BF6
-_08116916:
-	movs r0, 0x2
-	bl PlaySE
-	b _08116BF6
-_0811691E:
-	ldrb r0, [r6, 0xE]
-	bl ListMenu_ProcessInput
-	adds r4, r0, 0
-	ldr r0, _0811696C @ =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x1
-	ands r0, r1
-	cmp r0, 0
-	beq _0811699C
-	movs r0, 0x1
-	negs r0, r0
-	cmp r4, r0
-	beq _0811699C
-	ldr r0, [r6]
-	lsls r1, r4, 5
-	adds r0, r1
-	ldrb r1, [r0, 0xA]
-	ldrb r0, [r0, 0x1A]
-	lsls r0, 30
-	lsrs r0, 30
-	cmp r0, 0x1
-	bne _08116994
-	lsrs r0, r1, 7
-	cmp r0, 0
-	bne _08116994
-	adds r0, r6, 0
-	adds r1, r4, 0
-	bl sub_8116D10
-	adds r1, r0, 0
-	cmp r1, 0
-	bne _08116970
-	adds r0, r6, 0
-	adds r1, r4, 0
-	bl sub_8116D60
-	movs r0, 0x5
-	b _08116982
-	.align 2, 0
-_0811696C: .4byte gMain
-_08116970:
-	ldr r0, _0811698C @ =gStringVar4
-	ldr r2, _08116990 @ =gUnknown_8457608
-	subs r1, 0x1
-	lsls r1, 2
-	adds r1, r2
-	ldr r1, [r1]
-	bl StringCopy
-	movs r0, 0x12
-_08116982:
-	strb r0, [r6, 0x8]
-	movs r0, 0x67
-	bl PlaySE
-	b _08116D06
-	.align 2, 0
-_0811698C: .4byte gStringVar4
-_08116990: .4byte gUnknown_8457608
-_08116994:
-	movs r0, 0x7
-	bl PlaySE
-	b _08116D06
-_0811699C:
-	ldr r0, _081169B0 @ =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	bne _081169AA
-	b _08116D06
-_081169AA:
-	movs r0, 0xA
-	strb r0, [r6, 0x8]
-	b _08116D06
-	.align 2, 0
-_081169B0: .4byte gMain
-_081169B4:
-	ldr r4, _081169FC @ =gStringVar4
-	ldr r0, _08116A00 @ =gUnknown_203B058
-	ldrb r1, [r0]
-	adds r0, r4, 0
-	bl sub_811631C
-	adds r0, r6, 0
-	adds r0, 0x9
-	adds r1, r4, 0
-	bl sub_811A0F8
-	lsls r0, 24
-	cmp r0, 0
-	bne _081169D2
-	b _08116D06
-_081169D2:
-	ldr r4, _08116A04 @ =gStringVar1
-	ldrb r0, [r6, 0xF]
-	lsls r0, 5
-	ldr r1, [r6]
-	adds r1, r0
-	adds r1, 0x10
-	adds r0, r4, 0
-	bl StringCopy7
-	ldr r1, [r6]
-	ldrb r0, [r6, 0xF]
-	lsls r0, 5
-	adds r1, r0
-	ldrb r1, [r1]
-	lsls r1, 28
-	lsrs r1, 28
-	adds r0, r4, 0
-	bl ConvertInternationalString
-	b _08116C0A
-	.align 2, 0
-_081169FC: .4byte gStringVar4
-_08116A00: .4byte gUnknown_203B058
-_08116A04: .4byte gStringVar1
-_08116A08:
-	ldr r0, _08116A3C @ =gReceivedRemoteLinkPlayers
-	ldrb r0, [r0]
-	cmp r0, 0
-	beq _08116AA4
-	ldr r4, _08116A40 @ =gUnknown_203B058
-	ldr r1, [r6]
-	ldrb r0, [r6, 0xF]
-	lsls r0, 5
-	adds r1, r0
-	ldrb r0, [r1, 0xA]
-	lsls r0, 25
-	lsrs r0, 25
-	strb r0, [r4]
-	movs r0, 0
-	movs r1, 0
-	bl sub_80FB9E4
-	ldrb r0, [r4]
-	subs r0, 0x1
-	cmp r0, 0x15
-	bhi _08116AA4
-	lsls r0, 2
-	ldr r1, _08116A44 @ =_08116A48
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_08116A3C: .4byte gReceivedRemoteLinkPlayers
-_08116A40: .4byte gUnknown_203B058
-_08116A44: .4byte _08116A48
-	.align 2, 0
-_08116A48:
-	.4byte _08116AA0
-	.4byte _08116AA0
-	.4byte _08116AA0
-	.4byte _08116AA0
-	.4byte _08116AA0
-	.4byte _08116AA4
-	.4byte _08116AA4
-	.4byte _08116AA4
-	.4byte _08116AA0
-	.4byte _08116AA0
-	.4byte _08116AA0
-	.4byte _08116AA4
-	.4byte _08116AA0
-	.4byte _08116AA0
-	.4byte _08116AA4
-	.4byte _08116AA4
-	.4byte _08116AA4
-	.4byte _08116AA4
-	.4byte _08116AA4
-	.4byte _08116AA4
-	.4byte _08116AA0
-	.4byte _08116AA0
-_08116AA0:
-	movs r0, 0x14
-	strb r0, [r6, 0x8]
-_08116AA4:
-	bl sub_80FB9F4
-	lsls r0, 24
-	lsrs r0, 24
-	subs r0, 0x1
-	cmp r0, 0x8
-	bhi _08116B70
-	lsls r0, 2
-	ldr r1, _08116ABC @ =_08116AC0
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_08116ABC: .4byte _08116AC0
-	.align 2, 0
-_08116AC0:
-	.4byte _08116AE4
-	.4byte _08116AEA
-	.4byte _08116B70
-	.4byte _08116B70
-	.4byte _08116AF0
-	.4byte _08116AEA
-	.4byte _08116B44
-	.4byte _08116B70
-	.4byte _08116AEA
-_08116AE4:
-	movs r0, 0xC
-	strb r0, [r6, 0x8]
-	b _08116B70
-_08116AEA:
-	movs r0, 0xE
-	strb r0, [r6, 0x8]
-	b _08116B70
-_08116AF0:
-	ldr r4, _08116B30 @ =gStringVar4
-	ldr r5, _08116B34 @ =gUnknown_203B058
-	ldrb r1, [r5]
-	adds r0, r4, 0
-	bl sub_81163B0
-	adds r0, r6, 0
-	adds r0, 0x9
-	adds r1, r4, 0
-	bl sub_811A0F8
-	lsls r0, 24
-	cmp r0, 0
-	beq _08116B70
-	movs r0, 0x7
-	movs r1, 0
-	bl sub_80FB9E4
-	ldr r0, _08116B38 @ =gStringVar1
-	ldr r2, _08116B3C @ =gUnknown_8456C74
-	ldrb r1, [r5]
-	lsls r1, 2
-	adds r1, r2
-	ldr r1, [r1]
-	bl StringCopy
-	ldr r1, _08116B40 @ =gUnknown_8457700
-	adds r0, r4, 0
-	bl StringExpandPlaceholders
-	b _08116B70
-	.align 2, 0
-_08116B30: .4byte gStringVar4
-_08116B34: .4byte gUnknown_203B058
-_08116B38: .4byte gStringVar1
-_08116B3C: .4byte gUnknown_8456C74
-_08116B40: .4byte gUnknown_8457700
-_08116B44:
-	ldrb r0, [r6, 0x15]
-	cmp r0, 0xF0
-	bls _08116B6C
-	adds r0, r6, 0
-	adds r0, 0x9
-	ldr r1, _08116B68 @ =gStringVar4
-	bl sub_811A0F8
-	lsls r0, 24
-	cmp r0, 0
-	beq _08116B70
-	movs r0, 0xC
-	movs r1, 0
-	bl sub_80FB9E4
-	movs r0, 0
-	b _08116B6E
-	.align 2, 0
-_08116B68: .4byte gStringVar4
-_08116B6C:
-	adds r0, 0x1
-_08116B6E:
-	strb r0, [r6, 0x15]
-_08116B70:
-	bl sub_80FB9F4
-	lsls r0, 24
-	cmp r0, 0
-	beq _08116B7C
-	b _08116D06
-_08116B7C:
-	ldr r0, _08116B90 @ =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	bne _08116B8A
-	b _08116D06
-_08116B8A:
-	movs r0, 0x7
-	strb r0, [r6, 0x8]
-	b _08116D06
-	.align 2, 0
-_08116B90: .4byte gMain
-_08116B94:
-	adds r0, r6, 0
-	adds r0, 0x9
-	ldr r1, _08116BAC @ =gUnknown_845771C
-	bl sub_811A0F8
-	lsls r0, 24
-	cmp r0, 0
-	bne _08116BA6
-	b _08116D06
-_08116BA6:
-	movs r0, 0x8
-	strb r0, [r6, 0x8]
-	b _08116D06
-	.align 2, 0
-_08116BAC: .4byte gUnknown_845771C
-_08116BB0:
-	adds r4, r6, 0
-	adds r4, 0x9
-	bl sub_80FB9F4
-	adds r1, r0, 0
-	lsls r1, 24
-	lsrs r1, 24
-	adds r0, r4, 0
-	bl sub_811A14C
-	lsls r0, 24
-	asrs r1, r0, 24
-	movs r0, 0x1
-	negs r0, r0
-	cmp r1, r0
-	beq _08116BEE
-	cmp r1, r0
-	bgt _08116BDC
-	subs r0, 0x2
-	cmp r1, r0
-	beq _08116BF2
-	b _08116D06
-_08116BDC:
-	cmp r1, 0
-	beq _08116BE6
-	cmp r1, 0x1
-	beq _08116BEE
-	b _08116D06
-_08116BE6:
-	bl sub_80FA6BC
-	movs r0, 0x9
-	b _08116BF4
-_08116BEE:
-	movs r0, 0x5
-	b _08116BF4
-_08116BF2:
-	movs r0, 0x6
-_08116BF4:
-	strb r0, [r6, 0x8]
-_08116BF6:
-	ldrb r0, [r6, 0xE]
-	bl RedrawListMenu
-	b _08116D06
-_08116BFE:
-	bl sub_80FB9F4
-	lsls r0, 24
-	cmp r0, 0
-	bne _08116C0A
-	b _08116D06
-_08116C0A:
-	movs r0, 0x6
-	strb r0, [r6, 0x8]
-	b _08116D06
-_08116C10:
-	ldrb r0, [r6, 0xD]
-	bl ClearWindowTilemap
-	ldrb r0, [r6, 0xD]
-	movs r1, 0
-	bl ClearStdWindowAndFrame
-	ldrb r0, [r6, 0xE]
-	movs r1, 0
-	movs r2, 0
-	bl DestroyListMenuTask
-	ldrb r0, [r6, 0xC]
-	bl ClearWindowTilemap
-	ldrb r0, [r6, 0xB]
-	movs r1, 0
-	bl ClearStdWindowAndFrame
-	movs r0, 0
-	bl CopyBgTilemapBufferToVram
-	ldrb r0, [r6, 0xD]
-	bl RemoveWindow
-	ldrb r0, [r6, 0xB]
-	bl RemoveWindow
-	ldrb r0, [r6, 0xC]
-	bl RemoveWindow
-	ldrb r0, [r6, 0x11]
-	bl DestroyTask
-	ldr r0, [r6]
-	bl Free
-	ldr r0, [r6, 0x4]
-	bl Free
-	ldrb r0, [r6, 0x8]
-	adds r0, 0x1
-	strb r0, [r6, 0x8]
-	b _08116D06
-_08116C68:
-	bl DestroyWirelessStatusIndicatorSprite
-	adds r5, r6, 0
-	adds r5, 0x9
-	ldr r4, _08116C90 @ =gUnknown_8457754
-	bl sub_80FB9F4
-	lsls r0, 24
-	lsrs r0, 22
-	adds r0, r4
-	ldr r1, [r0]
-	adds r0, r5, 0
-	bl sub_811A0F8
-	lsls r0, 24
-	cmp r0, 0
-	beq _08116D06
-	ldr r0, _08116C94 @ =gSpecialVar_Result
-	movs r1, 0x6
-	b _08116CDC
-	.align 2, 0
-_08116C90: .4byte gUnknown_8457754
-_08116C94: .4byte gSpecialVar_Result
-_08116C98:
-	bl DestroyWirelessStatusIndicatorSprite
-	ldr r0, _08116CA4 @ =gSpecialVar_Result
-	movs r1, 0x5
-	b _08116CDC
-	.align 2, 0
-_08116CA4: .4byte gSpecialVar_Result
-_08116CA8:
-	bl DestroyWirelessStatusIndicatorSprite
-	adds r5, r6, 0
-	adds r5, 0x9
-	ldr r4, _08116CC4 @ =gUnknown_8457754
-	bl sub_80FB9F4
-	lsls r0, 24
-	lsrs r0, 22
-	adds r0, r4
-	ldr r1, [r0]
-	adds r0, r5, 0
-	b _08116CCE
-	.align 2, 0
-_08116CC4: .4byte gUnknown_8457754
-_08116CC8:
-	adds r0, r6, 0
-	adds r0, 0x9
-	ldr r1, _08116CE4 @ =gStringVar4
-_08116CCE:
-	bl sub_811A0F8
-	lsls r0, 24
-	cmp r0, 0
-	beq _08116D06
-	ldr r0, _08116CE8 @ =gSpecialVar_Result
-	movs r1, 0x8
-_08116CDC:
-	strh r1, [r0]
-	movs r0, 0x17
-	strb r0, [r6, 0x8]
-	b _08116D06
-	.align 2, 0
-_08116CE4: .4byte gStringVar4
-_08116CE8: .4byte gSpecialVar_Result
-_08116CEC:
-	adds r0, r4, 0
-	bl DestroyTask
-	bl sub_811A41C
-	bl sub_80F8DC0
-	b _08116D06
-_08116CFC:
-	bl sub_8117990
-	adds r0, r4, 0
-	bl DestroyTask
-_08116D06:
-	add sp, 0x8
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_8116738
-
 	thumb_func_start sub_8116D10
 sub_8116D10: @ 8116D10
 	push {lr}
diff --git a/include/link_rfu.h b/include/link_rfu.h
index fd77688f2..a0db0a425 100644
--- a/include/link_rfu.h
+++ b/include/link_rfu.h
@@ -307,6 +307,8 @@ void sub_80FAF58(u8 a0, u32 a1, u32 a2);
 void sub_80FBB8C(u32 a0);
 void sub_80FBD4C(const u8 *ptr, u16 a1);
 void LinkRfu3_SetGnameUnameFromStaticBuffers(struct GFtgtGname *gname, u8 *uname);
+void sub_80FBBD8(void);
+void sub_80FA6BC(void);
 
 #include "mevent_server.h"
 extern const struct mevent_server_cmd gMEventSrvScript_OtherTrainerCanceled[];
diff --git a/src/union_room.c b/src/union_room.c
index 8874ea816..37c3e7c0a 100644
--- a/src/union_room.c
+++ b/src/union_room.c
@@ -20,17 +20,23 @@ EWRAM_DATA u8 gUnknown_203B058 = 0;
 EWRAM_DATA u8 gUnknown_203B059 = 0;
 
 IWRAM_DATA struct UnkStruct_Leader *gUnknown_3002024;
+IWRAM_DATA struct UnkStruct_Group *gUnknown_3002028;
 
 void sub_8115A68(u8 taskId);
 void sub_81161E4(struct UnkStruct_Leader * leader);
 bool8 sub_8116444(struct UnkStruct_Leader * leader, u32 a1, u32 a2);
 u8 sub_8116524(struct UnkStruct_Main0 * a0);
 u8 sub_81165E8(struct UnkStruct_Main0 * a0);
+void sub_8116738(u8 taskId);
+u32 sub_8116D10(struct UnkStruct_Group * group, s32 id);
+void sub_8116D60(struct UnkStruct_Group * group, s32 id);
+u8 sub_8116FE4(void);
 void sub_8117990(void);
 u16 sub_8118658(const u8 *data);
 u8 sub_811A054(struct UnkStruct_Main4 *arg0, u32 arg1);
 bool8 sub_811A0F8(u8 *textState, const u8 *str);
 s8 sub_811A14C(u8 *dest, bool32 arg1);
+void sub_811A41C(void);
 void sub_811A444(u8 windowId, u8 fontId, const u8 *str, u8 x, u8 y, u8 colorIdx);
 void sub_811A5E4(struct UnkStruct_x20 *arg0, u8 count);
 void sub_811A650(struct UnkStruct_Main4 *arg0, u8 count);
@@ -44,7 +50,11 @@ extern const u32 gUnknown_8456CD8[];
 extern const struct WindowTemplate gUnknown_8456CFC;
 extern const struct WindowTemplate gUnknown_8456D04;
 extern const struct ListMenuTemplate gUnknown_8456D34;
+extern const struct WindowTemplate gUnknown_8456D4C;
+extern const struct WindowTemplate gUnknown_8456D54;
+extern const struct ListMenuTemplate gUnknown_8456DDC;
 extern const struct UnkStruct_Shared gUnknown_8457034;
+extern const u8 gUnknown_84570C8[];
 extern const u8 gUnknown_84571B4[];
 extern const u8 gUnknown_8457234[];
 extern const u8 gUnknown_8457264[];
@@ -56,12 +66,18 @@ extern const u8 gUnknown_84574EC[];
 extern const u8 gUnknown_8457514[];
 extern const u8 gUnknown_8457530[];
 extern const u8 gUnknown_8457554[];
+extern const u8 *const gUnknown_8457608[];
 extern const u8 gUnknown_8457610[];
 extern const u8 *const gUnknown_845767C[];
 extern const u8 gUnknown_84576AC[];
 extern const u8 gUnknown_84576C4[];
+extern const u8 gUnknown_8457700[];
+extern const u8 gUnknown_845771C[];
+extern const u8 *const gUnknown_8457754[];
 extern const u8 gUnknown_8457E28[];
 extern const u8 gUnknown_8457E44[];
+extern const u8 gUnknown_8458FC8[];
+extern const u8 *const gUnknown_84591B8[];
 extern const u8 gUnknown_8459238[];
 extern const u8 gUnknown_8459250[];
 
@@ -644,3 +660,260 @@ u8 sub_81165E8(struct UnkStruct_Main0 *arg0)
 
     return ret;
 }
+
+void TryJoinLinkGroup(void)
+{
+    u8 taskId;
+    struct UnkStruct_Group *dataPtr;
+
+    taskId = CreateTask(sub_8116738, 0);
+    gUnknown_203B05C.group = dataPtr = (void*)(gTasks[taskId].data);
+    gUnknown_3002028 = dataPtr;
+
+    dataPtr->state = 0;
+    dataPtr->textState = 0;
+    gSpecialVar_Result = 0;
+}
+
+void sub_8116738(u8 taskId)
+{
+    s32 id;
+    struct UnkStruct_Group *data = gUnknown_203B05C.group;
+
+    switch (data->state)
+    {
+    case 0:
+        sub_80FAF58(gUnknown_84570C8[gSpecialVar_0x8004], 0, 0);
+        gUnknown_203B058 = gUnknown_84570C8[gSpecialVar_0x8004];
+        sub_800B1F4();
+        OpenLink();
+        sub_80FBBD8();
+        data->field_4 = AllocZeroed(0x70);
+        data->field_0 = AllocZeroed(0x200);
+        data->state = 1;
+        break;
+    case 1:
+        if (sub_811A0F8(&data->textState, gUnknown_84591B8[gSpecialVar_0x8004]))
+            data->state = 2;
+        break;
+    case 2:
+        sub_811A650(data->field_4, 4);
+        sub_811A5E4(data->field_0->arr, 16);
+        data->field_11 = sub_811A054(data->field_4, gSpecialVar_0x8004);
+        data->field_C = AddWindow(&gUnknown_8456CD0);
+        data->listWindowId = AddWindow(&gUnknown_8456D4C);
+        data->field_D = AddWindow(&gUnknown_8456D54);
+
+        FillWindowPixelBuffer(data->field_C, PIXEL_FILL(2));
+        sub_811A444(data->field_C, 0, gUnknown_8458FC8, 8, 2, 4);
+        PutWindowTilemap(data->field_C);
+        CopyWindowToVram(data->field_C, 2);
+
+        DrawStdWindowFrame(data->listWindowId, FALSE);
+        gMultiuseListMenuTemplate = gUnknown_8456DDC;
+        gMultiuseListMenuTemplate.windowId = data->listWindowId;
+        data->listTaskId = ListMenuInit(&gMultiuseListMenuTemplate, 0, 0);
+
+        DrawStdWindowFrame(data->field_D, FALSE);
+        PutWindowTilemap(data->field_D);
+        sub_8115924(data->field_D);
+        CopyWindowToVram(data->field_D, 2);
+
+        CopyBgTilemapBufferToVram(0);
+        data->field_F = 0;
+        data->state = 3;
+        break;
+    case 3:
+        id = sub_8116FE4();
+        switch (id)
+        {
+        case 1:
+            PlaySE(SE_PC_LOGIN);
+            RedrawListMenu(data->listTaskId);
+            break;
+        case 0:
+            id = ListMenu_ProcessInput(data->listTaskId);
+            if (gMain.newKeys & A_BUTTON && id != -1)
+            {
+                // this unused variable along with the assignment is needed to match
+                u32 unusedVar;
+                unusedVar  = data->field_0->arr[id].unk.field_0.unk_0a_0;
+
+                if (data->field_0->arr[id].field_1A_0 == 1 && !data->field_0->arr[id].unk.field_0.unk_0a_7)
+                {
+                    u32 var = sub_8116D10(data, id);
+                    if (var == 0)
+                    {
+                        sub_8116D60(data, id);
+                        data->state = 5;
+                        PlaySE(SE_PN_ON);
+                    }
+                    else
+                    {
+                        StringCopy(gStringVar4, gUnknown_8457608[var - 1]);
+                        data->state = 18;
+                        PlaySE(SE_PN_ON);
+                    }
+                }
+                else
+                {
+                    PlaySE(SE_WALL_HIT);
+                }
+            }
+            else if (gMain.newKeys & B_BUTTON)
+            {
+                data->state = 10;
+            }
+            break;
+        default:
+            RedrawListMenu(data->listTaskId);
+            break;
+        }
+        break;
+    case 5:
+        sub_811631C(gStringVar4, gUnknown_203B058);
+        if (sub_811A0F8(&data->textState, gStringVar4))
+        {
+            sub_8018404(gStringVar1, data->field_0->arr[data->field_F]);
+            data->state = 6;
+        }
+        break;
+    case 6:
+        if (gReceivedRemoteLinkPlayers != 0)
+        {
+            gUnknown_203B058 = data->field_0->arr[data->field_F].unk.field_0.unk_0a_0;
+            sub_80FB9E4(0, 0);
+            switch (gUnknown_203B058)
+            {
+            case 1 ... 5:
+            case 9 ... 11:
+            case 13 ... 14:
+            case 21 ... 22:
+                data->state = 20;
+                break;
+            }
+        }
+
+        switch (sub_80FB9F4())
+        {
+        case 1:
+            data->state = 12;
+            break;
+        case 2:
+        case 6:
+        case 9:
+            data->state = 14;
+            break;
+        case 5:
+            sub_81163B0(gStringVar4, gUnknown_203B058);
+            if (sub_811A0F8(&data->textState, gStringVar4))
+            {
+                sub_80FB9E4(7, 0);
+                StringCopy(gStringVar1, gUnknown_8456C74[gUnknown_203B058]);
+                StringExpandPlaceholders(gStringVar4, gUnknown_8457700);
+            }
+            break;
+        case 7:
+            if (data->field_15 > 0xF0)
+            {
+                if (sub_811A0F8(&data->textState, gStringVar4))
+                {
+                    sub_80FB9E4(12, 0);
+                    data->field_15 = 0;
+                }
+            }
+            else
+            {
+                data->field_15++;
+            }
+            break;
+        }
+
+        if (!sub_80FB9F4() && gMain.newKeys & B_BUTTON)
+            data->state = 7;
+        break;
+    case 7:
+        if (sub_811A0F8(&data->textState, gUnknown_845771C))
+            data->state = 8;
+        break;
+    case 8:
+        switch (sub_811A14C(&data->textState, sub_80FB9F4()))
+        {
+        case 0:
+            sub_80FA6BC();
+            data->state = 9;
+            RedrawListMenu(data->listTaskId);
+            break;
+        case 1:
+        case -1:
+            data->state = 5;
+            RedrawListMenu(data->listTaskId);
+            break;
+        case -3:
+            data->state = 6;
+            RedrawListMenu(data->listTaskId);
+            break;
+        }
+        break;
+    case 9:
+        if (sub_80FB9F4())
+            data->state = 6;
+        break;
+    case 10:
+    case 12:
+    case 14:
+    case 18:
+    case 20:
+        ClearWindowTilemap(data->field_D);
+        ClearStdWindowAndFrame(data->field_D, FALSE);
+        DestroyListMenuTask(data->listTaskId, 0, 0);
+        ClearWindowTilemap(data->field_C);
+        ClearStdWindowAndFrame(data->listWindowId, FALSE);
+        CopyBgTilemapBufferToVram(0);
+        RemoveWindow(data->field_D);
+        RemoveWindow(data->listWindowId);
+        RemoveWindow(data->field_C);
+        DestroyTask(data->field_11);
+        Free(data->field_0);
+        Free(data->field_4);
+        data->state++;
+        break;
+    case 13:
+        DestroyWirelessStatusIndicatorSprite();
+        if (sub_811A0F8(&data->textState, gUnknown_8457754[sub_80FB9F4()]))
+        {
+            gSpecialVar_Result = 6;
+            data->state = 23;
+        }
+        break;
+    case 11:
+        DestroyWirelessStatusIndicatorSprite();
+        gSpecialVar_Result = 5;
+        data->state = 23;
+        break;
+    case 15:
+        DestroyWirelessStatusIndicatorSprite();
+        if (sub_811A0F8(&data->textState, gUnknown_8457754[sub_80FB9F4()]))
+        {
+            gSpecialVar_Result = 8;
+            data->state = 23;
+        }
+        break;
+    case 19:
+        if (sub_811A0F8(&data->textState, gStringVar4))
+        {
+            gSpecialVar_Result = 8;
+            data->state = 23;
+        }
+        break;
+    case 23:
+        DestroyTask(taskId);
+        sub_811A41C();
+        sub_80F8DC0();
+        break;
+    case 21:
+        sub_8117990();
+        DestroyTask(taskId);
+        break;
+    }
+}