Mario Superstar Baseball

Baby Luigi
Finish Challenge mode with Yoshi.
(Thanks to chaos__dragon@hotmail.com)

Coin Derby
Finish Challenge mode once.
(Thanks to chaos__dragon@hotmail.com)

Dixie Kong
Finish Challenge mode with Donkey Kong.
(Thanks to chaos__dragon@hotmail.com)

Grand Prix Mode
Finish all Mini-games on Star difficulty.
(Thanks to chaos__dragon@hotmail.com)

Hammer Bros
Beat Challenge mode with Bowser. (You have to be on the last level.)
(Thanks to Greendaynef@aol.com)

Koopa Castle Stadium
Finish Challenge mode once.
(Thanks to chaos__dragon@hotmail.com)

Monty Mole
Finish Challenge mode with Mario.
(Thanks to chaos__dragon@hotmail.com)

Petey Piranha
Finish Challenge mode with Wario.
(Thanks to chaos__dragon@hotmail.com)

Star Dash
Clear Star difficulty on all six mini-games.
(Thanks to chaos__dragon@hotmail.com)

Toadette
Finish Challenge Mode with Peach.
(Thanks to chaos__dragon@hotmail.com)