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Gamecube - Mario Superstar Baseball cheats

Hidden Characters:
Baby Luigi: Finish Challenge Mode with Yoshi.
Dixie Kong: Finish challenge mode with Donkey Kong.
Hammer Bro: Finish Challenge Mode with Bowser.
Monty Mole: Finish Challenge Mode with Mario.
Petey Piranha: Finish Challenge Mode with Wario.
Star Dash: Finish Star difficulty on all of the six mini-games.
Toadette: Finish Challenge Mode with Peach.

Unlock Koopa Castle Stadium: Finish Challenge Mode one time.