57e47233_and_Secrets_for_3DS___GameFAQs__How_to_Unlock
[Unlockable] Team Player [How to Unlock] 
A 1-on-1 fight is fun, but it's more fun on a team! Try fighting in a StreetPass Battle!
Super Street Fighter IV: 3D Edition Cheats, Codes, and Secrets for 3DS - GameFAQs