Dexter's Lab Codes -

Level select:
Press Square, Circle(2), Square, Left, Triangle, Square at the main menu. The message "Dexter, you must be cheating" will be spoken to confirm correct code entry.

All mini-games:
Press Circle, Left, Square, Circle, Up, Down, Circle at the main menu. The message "Dexter, you must be cheating" will be spoken to confirm correct code entry.

Unlimited lives in mini-games:
Press Down, Square, Circle, Square, Triangle, Circle, Right at the main menu. The message "Dexter, you must be cheating" will be spoken to confirm correct code entry.

Whack-A-Mole game:
Press Down, Circle, Triangle, Down, Circle, Triangle(2) at the main menu. The message "Dexter, you must be cheating" will be spoken to confirm correct code entry.

All vault items:
Press Circle(2), Left, Right, Circle, Triangle, Right at the main menu. The message "Dexter, you must be cheating" will be spoken to confirm correct code entry.

All blueprint enhancements:
Press Left, Circle(2), Up(2), Circle, Triangle at the main menu. The message "Dexter, you must be cheating" will be spoken to confirm correct code entry.