Unlock Bonuses
Battlefield - get 15 points/kills in endless mode.
Clock town - play 100 vs mode matches.
Clock town (alternative) - get 30 points/kills in endless mode with two players.
endless mode - unlock all characters.
Kirbys air ride - kill someone in vs mode with Kirby while using swallow and end the match.
Lavender town - win 20 vs mode matches as pikachu.
Mega man - complete arcade mode with the the first 4 characters.
Underground - beat arcade mode with Mario without losing a life.
Vaporeon - It appears in saffron city rarely, after showing up, beat it and end the match.
Wily castle - complete arcade mode for the first time.