Bugs Bunny: Lost In Time

All levels (PAL):
At the "Era Selector" screen, hold L2 + R1 and press X, Square, R2, L1, Circle, X, Square, Square, Square

Full carrots (PAL):
At the "Era Selector" screen, hold L2 + R1 and press X, Square, R2, L1, Circle, X, Square, Square, Circle.

View ending sequence (PAL):
At the "Era Selector" screen, hold L2 + R1 and press X, Square, R2, L1, Circle, X, Circle, Square, Circle.