diff --git a/worlds/kdl3/Rom.py b/worlds/kdl3/Rom.py
index 917ea02fb7..852fcfa97e 100644
--- a/worlds/kdl3/Rom.py
+++ b/worlds/kdl3/Rom.py
@@ -368,7 +368,7 @@ class KDL3ProcedurePatch(APProcedurePatch, APTokenMixin):
         ("apply_bsdiff4", ["kdl3_basepatch.bsdiff4"]),
         ("apply_tokens", ["token_patch.bin"]),
         ("apply_post_patch", []),
-        ("write_snes_crc", [])
+        ("calc_snes_crc", [])
     ]
     name: bytes  # used to pass to init
 
@@ -555,8 +555,8 @@ def patch_rom(world: "KDL3World", patch: KDL3ProcedurePatch):
     patch.write_token(APTokenTypes.WRITE, 0x3C000, bytes(patch.name))
     patch.write_token(APTokenTypes.WRITE, 0x3C020, world.options.game_language.value.to_bytes(1, "little"))
 
-    patch.write_token(APTokenTypes.COPY, 0x7FC0, (0x3C000, 21))
-    patch.write_token(APTokenTypes.COPY, 0x7FD9, (0x3C020, 1))
+    patch.write_token(APTokenTypes.COPY, 0x7FC0, (21, 0x3C000))
+    patch.write_token(APTokenTypes.COPY, 0x7FD9, (1, 0x3C020))
 
     # handle palette
     if world.options.kirby_flavor_preset.value != 0:
diff --git a/worlds/kdl3/data/kdl3_basepatch.bsdiff4 b/worlds/kdl3/data/kdl3_basepatch.bsdiff4
index 662467bac0..d16fef7b7f 100644
Binary files a/worlds/kdl3/data/kdl3_basepatch.bsdiff4 and b/worlds/kdl3/data/kdl3_basepatch.bsdiff4 differ
diff --git a/worlds/kdl3/src/kdl3_basepatch.asm b/worlds/kdl3/src/kdl3_basepatch.asm
index 4a5b82fde6..dc0c719398 100644
--- a/worlds/kdl3/src/kdl3_basepatch.asm
+++ b/worlds/kdl3/src/kdl3_basepatch.asm
@@ -58,6 +58,10 @@ org $01AFC8
 org $01B013
     SEC ; Remove Dedede Bad Ending
 
+org $01B050
+    JSL HookBossPurify
+    NOP
+
 org $02B7B0 ; Zero unlock
     LDA $80A0
     CMP #$0001
@@ -1230,6 +1234,28 @@ ApplyLocalCheck:
     .Return:
     RTL
 
+HookBossPurify:
+    ORA $B0
+    STA $53D5
+    LDA $B0
+    LDX #$0000
+    LSR
+    .Loop:
+    BIT #$0001
+    BNE .Apply
+    LSR
+    LSR
+    INX
+    CPX #$0005
+    BCS .Return
+    BRA .Loop
+    .Apply:
+    TXA
+    ORA #$0200
+    JSL ApplyLocalCheck
+    .Return:
+    RTL
+
 org $07C000
     db "KDL3_BASEPATCH_ARCHI"