Clones In Team Mode  At the character select screen, press and hold Start and press Up+Circle, Down+Triangle, <+X, >+Square, Up+Circle.

Exit  Press and hold Circle+Square+X+Triangle and press Select. (Thanks to Adrian_V@webtv.net)

Play As Bosses  Edit team, and press and hold Start and press Up+Circle, >+Square, <+X, Down+Triangle

Secret Fighters  Press and hold Start and press Up+Circle, >+Square, <+X, Down+Triangle at the character select screen. (Thanks to DANMONEY@webtv.net)

Win Demo Toggles  At the configuration screen, press and hold L1+L2+R1+R2. (Thanks to Adrian_V@webtv.net)