Complete the indicated task to unlock the corresponding costume. Note: They will also change your Statlines.

Bee Mario: Buy the Black Shopping Card from the Secret Store.
Charmy: Buy the Gold Shopping Card from the Secret Store.
Diddy Kong: Buy the Platinum Shopping Card from the Secret Store.
Dry Bones: Defeat Team Dry Bones in Team Festival mode Curling.
Dry Bowser: Defeat Team Dry Bowser in Individual or Team Festival mode Ice Hockey.
Espio: Buy the Black Shopping Card from the Secret Store.
Omega: Defeat Omega in Individual Festival mode Speed Skating or Team Festival mode Short Track Relay.
Rouge: Defeat Rouge in Individual or Team Festival mode Figure Skating.