Use the following combinations at the main menu:
All Costumes: Triangle, Circle, Triangle, Square, Square, Square, L1 + L2
Pick level: Triangle, Circle, Triangle, Square, Triangle, Circle, L1 + R1
Cerebro Files: Triangle, Circle, Triangle, Square, Square, Square, R1 + R2
All Strikes: Triangle, Circle, Triangle, Square, Triangle, Circle, L1, R2
Debug menu: Triangle, Triangle, Circle, Circle, Square, Square, Circle, Circle, L1+ R1 + L2 + R2