57e47233_and_Secrets_for_3DS___GameFAQs__How_to_Unlock
[Unlockable] Now You C Me... [How to Unlock] 
I wrestle only the strong! You shall rank up to C Rank against another player if you wanna face me, comrade!
Super Street Fighter IV: 3D Edition Cheats, Codes, and Secrets for 3DS - GameFAQs