Secret Characters:
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Not all players are unlocked from the start so you will need to unlock
them if you want to enjoy and experience all of the characters:
Baby Luigi – Complete Challenge Mode with Yoshi
Star Dash – Finish Star difficulty on all of the six mini-games
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
Toadette – Finish Challenge Mode with Peach
Unlock Koopa Castle Stadium:
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Complete Challenge Mode one time.
Cheat:
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Press A then R to do a fire ball.