link_rfu_4 is part of mystery_gift_menu

asm/intro.s

@@ -2742,14 +2742,14 @@ _080EDC0C:
 	bl DisableInterrupts
 	movs r0, 0
 	bl SetHBlankCallback
-	ldr r0, _080EDC3C @ =sub_8078914
+	ldr r0, _080EDC3C @ =CB2_InitTitleScreen
 	bl SetMainCallback2
 _080EDC34:
 	pop {r4}
 	pop {r0}
 	bx r0
 	.align 2, 0
-_080EDC3C: .4byte sub_8078914
+_080EDC3C: .4byte CB2_InitTitleScreen
 	thumb_func_end sub_80EDBE8
 
 	thumb_func_start sub_80EDC40

asm/main_menu.s

@@ -1005,7 +1005,7 @@ _0800CB64: .4byte gPlttBufferUnfaded
 _0800CB68: .4byte gPlttBufferFaded
 _0800CB6C: .4byte gUnknown_2031DE0
 _0800CB70:
-	ldr r0, _0800CB8C @ =sub_81422AC
+	ldr r0, _0800CB8C @ =c2_mystery_gift
 	bl SetMainCallback2
 	bl sub_812B478
 	bl FreeAllWindowBuffers
@@ -1017,7 +1017,7 @@ _0800CB84:
 	pop {r0}
 	bx r0
 	.align 2, 0
-_0800CB8C: .4byte sub_81422AC
+_0800CB8C: .4byte c2_mystery_gift
 	thumb_func_end sub_800CA94
 
 	thumb_func_start sub_800CB90
@@ -1141,7 +1141,7 @@ sub_800CC68: @ 800CC68
 	ands r0, r1
 	cmp r0, 0
 	bne _0800CC86
-	ldr r0, _0800CC90 @ =sub_8078914
+	ldr r0, _0800CC90 @ =CB2_InitTitleScreen
 	bl SetMainCallback2
 	adds r0, r4, 0
 	bl DestroyTask
@@ -1151,7 +1151,7 @@ _0800CC86:
 	bx r0
 	.align 2, 0
 _0800CC8C: .4byte gPaletteFade
-_0800CC90: .4byte sub_8078914
+_0800CC90: .4byte CB2_InitTitleScreen
 	thumb_func_end sub_800CC68
 
 	thumb_func_start sub_800CC94

asm/title_screen.s

@@ -5,8 +5,8 @@
 
 	.text
 
-	thumb_func_start sub_8078914
-sub_8078914: @ 8078914
+	thumb_func_start CB2_InitTitleScreen
+CB2_InitTitleScreen: @ 8078914
 	push {r4-r6,lr}
 	sub sp, 0xC
 	ldr r0, _08078930 @ =gMain
@@ -230,7 +230,7 @@ _08078B26:
 	bx r0
 	.align 2, 0
 _08078B30: .4byte gMain
-	thumb_func_end sub_8078914
+	thumb_func_end CB2_InitTitleScreen
 
 	thumb_func_start sub_8078B34
 sub_8078B34: @ 8078B34