Muppet Pinball Mayhem – Gameboy Advance

Muppet Pinball Mayhem - Platform: Gameboy Advance

Animal Machine:
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Select the 'Credits' option at the main menu. Then, press 
Left, Right(2), Up, R, Down(2), L at the credits screen. 
A sound will confirm correct code entry. Alternately, 
successfully complete the game in adventure mode.