Complete all cups on normal.
Unlock Sports Mix mode:
Complete tournaments in every sport and defeat Behemoth.
Unlock Golden Sport Sets:
Complete Tournament mode under the Normal and Hard difficulty for a sport set to unlock the Golden version of that sport set.
Unlock Behemoth character:
Complete the tournaments in every sport to face Behemoth from Final Fantasy.
Unlock Black Mage character:
Complete Star Road, located on the Star Cup map twice in tournament mode. Complete Star Road 3 times to unlock him for the other 3 sports.
Unlock Cactuar character:
Play 60 games or defeat him on a hidden path in tournament mode.
Unlock Moogle character:
Clear the Mushroom Cup Slime - Play 28 games or defeat him on a hidden path in tournament mode.
Unlock Ninja character:
Complete Star Road, located on the Star Cup map once in tournament mode.
Unlock Slime character:
Win 28 games
Unlock Rosalina character:
Win all mini-games in Basketball, Volleyball, Hockey, and Dodgeball (in order).
Unlock White Mage character:
Complete Star Road, located on the Star Cup map twice in tournament mode.
Unlock Bowser's Castle stage:
Defeat Bowser in the Star Cup.
Unlock Daisy Garden stage:
Complete the Flower Cup. This stage is not compatible with Volleyball.
Unlock Ghost Ship stage:
Play 40 matches.
Unlock Koopa Beach stage:
Complete a match that is played on Koopa Beach in Tournament Mode.
Unlock Peach's Castle stage:
Complete the Mushroom Cup.
Unlock Starship stage:
Complete the Star Cup.
Unlock Waluigi Pinball stage:
Play 35 matches. This stage is not compatible with Basketball.
Unlock Wario Factory stage:
Complete a match that is played on Wario Factory in Tournament Mode.