Unlock the following characters for play in Versus mode by performing the corresponding tasks:
CHARACTER - HOW TO UNLOCK
Aru - Defeat Aru in Story mode during the quests before the second main level.
Irisu - Defeat Irisu in Story mode.
Nano - Defeat Nano in Story mode.
Tonton - Defeat Tonton in Story mode.
Yango - Defeat Yango in Story mode during the quests before the first main level.