Cheat codes:

Small players           Square, R2, Right, L2, L1
Big heads               Triangle, Triangle, L2, L1, L1
Alternate clothes       Circle, L2, Left, R2, Triangle
Black/white mode        Up, R1, L2, R1, R2
Head as ball            Left, L1, L1, L1, R2
Topless                 Down, R2, R2, R2, Triangle
Small heads             R2, Down, L2, L1, Circle
70's mode               L1, R2, L2, Circle, R1