Level Select

At the main menu, press Triangle, Circle, Triangle, Square, Triangle, Circle, L1 + R1.

Unlock All Costumes

At the main menu, press Triangle, Circle, Triangle, Square, Square, Square, L1 + L2.

Unlock Debug Menu

At the main menu, press Triangle, Triangle, Circle, Circle, Square, Square, Circle, Circle, L1+ R1 + L2 + R2. (The Debug menu will be available from the pause screen.)

Unlock All Cerebro Files

At the main menu, press Triangle, Circle, Triangle, Square, Square, Square, R1 + R2.