One Piece - Going Baseball - Platform: Gameboy Advance

Powerful Chopper:
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Press Up, Right, Down, Up, A, B at the "Push Start" screen.

Powerful Enel:
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Press Up, Down, Up, Down, B, A at the "Push Start" screen.

Powerful Luffy:
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Press Left, Right, Left, Right, A, B at the "Push Start" screen.

Powerful Nami:
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Press Down, Down, Up, Up, B, A at the "Push Start" screen.

Powerful Robin:
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Press Up, Right, Down, Left, B, A at the "Push Start" screen.

Powerful Sanji:
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Press Right, Left, Up, Down, A, B at the "Push Start" screen.

Powerful Usopp:
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Press Up, Down, Up, Up, A, B at the "Push Start" screen.

Powerful Zoro:
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Press Left, Up, Left, Down, B, A at the "Push Start" screen.

Play against Red Hair team:
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Defeat all the other teams as Luffy's team. You will then face the Red Hair team.