Maniac Racer Advance – Gameboy Advance

Maniac Racer Advance - Platform: Gameboy Advance

Heelie (No Bikes):
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Pause the game and while holding down the L Button, enter 
the command: Down, A, B, Right, Down, Down, A You will 
hear a sound effect if entered correctly. 
Press start to resume the game.

Dave - Finish the Advance Cup in Championship Mode. 

Omega0605 - Finish the Expert Cup in Championship Mode