Programmer's mode
 
 At the character selection screen, hold L and press A, B, A, B, A, B,
 C-Left, C-Right, C-Up, C-Right, C-Left, C-Right. In this mode, any
 character can be selected, and has an overhead view of each stage.
 
 CPU control
 
 At the character selection screen, hold L and press A(5), C-Up,
 C-Down, C-Left, C-Left, B, A, C-Right.
 
 Play as Boogerman
 
 At the character selection screen, hold Z and press B(2), C-Right(2),
 C-Left(2). If you entered the code correctly, you will hear a sound.
 Then, highlight the "?" box and press R.
 
 Play as Earthworm Jim
 
 At the character selection screen, hold Z and press B, C-Left , C-Up
 , C-Right , C-Down , C-Up. If you entered the code correctly, you
 will hear a sound. Then, highlight the "?" box and press R.
 
 Play as High Five
 
 At the character selection screen, hold Z and press C-Up, C-Down,
 C-Left, C-Right, B, A. If you entered the code correctly, you will
 hear a sound. Then, highlight the "?" box and press R.
 
 Play as Sumo Santa
 
 At the character selection screen, hold Z and press A, C-Right, A,
 C-Right, C-Down, C-Up. If you entered the code correctly, you will
 hear a sound. Then, highlight the "?" box and press R.
 
 Alternate character color
 
 At the character selection screen, highlight a fighter and press
 C-Down. 
 
 Random character
 
 At the character selection screen, press L + R.