While playing, press L1 + L2 + R1 + R2 + Select on controller two. Then enter one of the codes:

Temporary invincibility Right, Down, L1, R2, R1, Circle, Triangle, Square 

30, 000 extra points Square, Up, Down, L2, R1, Triangle, X, Triangle 

Bonus level Triangle, Up, Triangle, L2, L1, L2, Square, X 
Motion blur Right, Circle, L2, Circle, R1, Circle, Square, Circle 

Chess Background L1, Circle, Left, Right, L2, Left, R2, R2 
Temporary invincibility (PAL) R1, Circle, Triangle, Square.