diff --git a/asm/nonmatchings/code_1a1f0_len_5390/FadeBackgroundToBlack.s b/asm/nonmatchings/code_1a1f0_len_5390/FadeBackgroundToBlack.s
deleted file mode 100644
index 10630d9188..0000000000
--- a/asm/nonmatchings/code_1a1f0_len_5390/FadeBackgroundToBlack.s
+++ /dev/null
@@ -1,43 +0,0 @@
-.set noat      # allow manual use of $at
-.set noreorder # don't insert nops after branches
-
-glabel FadeBackgroundToBlack
-/* 1A300 8003EF00 27BDFFE8 */  addiu     $sp, $sp, -0x18
-/* 1A304 8003EF04 AFB00010 */  sw        $s0, 0x10($sp)
-/* 1A308 8003EF08 0080802D */  daddu     $s0, $a0, $zero
-/* 1A30C 8003EF0C 10A0000E */  beqz      $a1, .L8003EF48
-/* 1A310 8003EF10 AFBF0014 */   sw       $ra, 0x14($sp)
-/* 1A314 8003EF14 0C04760B */  jal       func_8011D82C
-/* 1A318 8003EF18 24040001 */   addiu    $a0, $zero, 1
-/* 1A31C 8003EF1C 0000202D */  daddu     $a0, $zero, $zero
-/* 1A320 8003EF20 0080282D */  daddu     $a1, $a0, $zero
-/* 1A324 8003EF24 0080302D */  daddu     $a2, $a0, $zero
-/* 1A328 8003EF28 0080382D */  daddu     $a3, $a0, $zero
-/* 1A32C 8003EF2C 3C028015 */  lui       $v0, %hi(D_801512F0)
-/* 1A330 8003EF30 8C4212F0 */  lw        $v0, %lo(D_801512F0)($v0)
-/* 1A334 8003EF34 24030001 */  addiu     $v1, $zero, 1
-/* 1A338 8003EF38 0C046F97 */  jal       set_background_color_blend
-/* 1A33C 8003EF3C A0430000 */   sb       $v1, ($v0)
-/* 1A340 8003EF40 24020019 */  addiu     $v0, $zero, 0x19
-/* 1A344 8003EF44 AE020070 */  sw        $v0, 0x70($s0)
-.L8003EF48:
-/* 1A348 8003EF48 0000202D */  daddu     $a0, $zero, $zero
-/* 1A34C 8003EF4C 0080282D */  daddu     $a1, $a0, $zero
-/* 1A350 8003EF50 0080302D */  daddu     $a2, $a0, $zero
-/* 1A354 8003EF54 8E030070 */  lw        $v1, 0x70($s0)
-/* 1A358 8003EF58 24020019 */  addiu     $v0, $zero, 0x19
-/* 1A35C 8003EF5C 00431023 */  subu      $v0, $v0, $v1
-/* 1A360 8003EF60 00023880 */  sll       $a3, $v0, 2
-/* 1A364 8003EF64 00E23821 */  addu      $a3, $a3, $v0
-/* 1A368 8003EF68 00073840 */  sll       $a3, $a3, 1
-/* 1A36C 8003EF6C 0C046F97 */  jal       set_background_color_blend
-/* 1A370 8003EF70 30E700FE */   andi     $a3, $a3, 0xfe
-/* 1A374 8003EF74 8E020070 */  lw        $v0, 0x70($s0)
-/* 1A378 8003EF78 2442FFFF */  addiu     $v0, $v0, -1
-/* 1A37C 8003EF7C AE020070 */  sw        $v0, 0x70($s0)
-/* 1A380 8003EF80 2C420001 */  sltiu     $v0, $v0, 1
-/* 1A384 8003EF84 8FBF0014 */  lw        $ra, 0x14($sp)
-/* 1A388 8003EF88 8FB00010 */  lw        $s0, 0x10($sp)
-/* 1A38C 8003EF8C 00021040 */  sll       $v0, $v0, 1
-/* 1A390 8003EF90 03E00008 */  jr        $ra
-/* 1A394 8003EF94 27BD0018 */   addiu    $sp, $sp, 0x18
diff --git a/asm/nonmatchings/code_1a1f0_len_5390/func_8003F084.s b/asm/nonmatchings/code_1a1f0_len_5390/func_8003F084.s
deleted file mode 100644
index 1baa4480b0..0000000000
--- a/asm/nonmatchings/code_1a1f0_len_5390/func_8003F084.s
+++ /dev/null
@@ -1,21 +0,0 @@
-.set noat      # allow manual use of $at
-.set noreorder # don't insert nops after branches
-
-glabel func_8003F084
-/* 1A484 8003F084 27BDFFE8 */  addiu     $sp, $sp, -0x18
-/* 1A488 8003F088 AFBF0010 */  sw        $ra, 0x10($sp)
-/* 1A48C 8003F08C 0C00EABB */  jal       get_npc_unsafe
-/* 1A490 8003F090 2404FFF6 */   addiu    $a0, $zero, -0xa
-/* 1A494 8003F094 0040182D */  daddu     $v1, $v0, $zero
-/* 1A498 8003F098 906200AC */  lbu       $v0, 0xac($v1)
-/* 1A49C 8003F09C 2442FFEF */  addiu     $v0, $v0, -0x11
-/* 1A4A0 8003F0A0 A06200AC */  sb        $v0, 0xac($v1)
-/* 1A4A4 8003F0A4 304200FF */  andi      $v0, $v0, 0xff
-/* 1A4A8 8003F0A8 14400003 */  bnez      $v0, .L8003F0B8
-/* 1A4AC 8003F0AC 0000102D */   daddu    $v0, $zero, $zero
-/* 1A4B0 8003F0B0 A06000AC */  sb        $zero, 0xac($v1)
-/* 1A4B4 8003F0B4 24020001 */  addiu     $v0, $zero, 1
-.L8003F0B8:
-/* 1A4B8 8003F0B8 8FBF0010 */  lw        $ra, 0x10($sp)
-/* 1A4BC 8003F0BC 03E00008 */  jr        $ra
-/* 1A4C0 8003F0C0 27BD0018 */   addiu    $sp, $sp, 0x18
diff --git a/include/variables.h b/include/variables.h
index f8de9a1e1b..ee4f893b96 100644
--- a/include/variables.h
+++ b/include/variables.h
@@ -71,9 +71,11 @@ extern Npc* gPlayerNpcPtr;
 
 extern s8 D_800A0900;
 extern EncounterStatus gCurrentEncounter;
+extern s8* D_801512F0;
 extern s16 D_80151308;
 extern s32 D_80151310;
 extern s16* D_80151328;
+
 extern s16 D_8010CD10;
 extern s16 D_8010CD12;
 extern s32 D_8010CD20;
diff --git a/src/code_1a1f0_len_5390.c b/src/code_1a1f0_len_5390.c
index acd8b18e2f..c0ba67c202 100644
--- a/src/code_1a1f0_len_5390.c
+++ b/src/code_1a1f0_len_5390.c
@@ -41,7 +41,19 @@ ApiStatus func_8003EECC(ScriptInstance* script, s32 isInitialCall) {
     return (func_80045FA4() == 0) * ApiStatus_DONE2;
 }
 
-INCLUDE_ASM(s32, "code_1a1f0_len_5390", FadeBackgroundToBlack);
+ApiStatus FadeBackgroundToBlack(ScriptInstance* script, s32 isInitialCall) {
+    if (isInitialCall) {
+        func_8011D82C(1);
+        *D_801512F0 = 1;
+        set_background_color_blend(0, 0, 0, 0);
+        script->functionTemp[0].s = 25;
+    }
+
+    set_background_color_blend(0, 0, 0, ((25 - script->functionTemp[0].s) * 10) & 254);
+    script->functionTemp[0].s--;
+    do {} while(0);
+    return (script->functionTemp[0].s == 0) * ApiStatus_DONE2;
+}
 
 ApiStatus UnfadeBackgroundFromBlack(ScriptInstance* script, s32 isInitialCall) {
     if (isInitialCall) {
@@ -76,7 +88,17 @@ ApiStatus func_8003F018(ScriptInstance* script, s32 isInitialCall) {
     return ApiStatus_BLOCK;
 }
 
-INCLUDE_ASM(s32, "code_1a1f0_len_5390", func_8003F084);
+ApiStatus func_8003F084(ScriptInstance* script, s32 isInitialCall) {
+    Npc* npc = get_npc_unsafe(-0xA);
+
+    npc->unk_AC -= 17;
+    if (npc->unk_AC == 0) {
+        npc->unk_AC = 0;
+        return ApiStatus_DONE1;
+    }
+
+    return ApiStatus_BLOCK;
+}
 
 INCLUDE_ASM(s32, "code_1a1f0_len_5390", func_8003F0C4);