In challenge mode, defeat the character listed in a singles game to play as them.

Character	How to unlock
Big Chief	Defeat Big Chief in challenge mode.
Carol	Defeat Carol in challenge mode.
Gloria	Defeat Gloria in challenge mode.
Jun	Defeat Jun in challenge mode.
Kaito	Defeat Kaito in challenge mode.
Kent	Defeat Kent in challenge mode.
Lola	Defeat Lola in challenge mode.
Miranda	Defeat Miranda in challenge mode.
Momoka	Defeat Momoka in challenge mode.
Suzuki	Defeat Suzuki in challenge mode.
Will	Defeat Will in challenge mode.