Try entering the following codes during normal play if you need some help to progress in the game.

Doubles Enemy Reflex Points
Press X, X, Square, Square, Triangle, Triangle, Circle, Circle, Triangle, Triangle, X, X, R3.

Infinite Rage:
Press Triangle, Square, Square, Triangle, Circle, Circle, X, X, Triangle, R3.

Undying (lose health but never die):
Press Square, X, X, Square, Triangle, Triangle, Square, Circle, Circle, Square, R3.

To get this yellow and blue costume which Wolverine originally wore when he first joined the X-Men press X, Square, Circle, X, Triangle, X, Triangle, X, Square, Circle, Circle, Square, R3. If you have entered the code correctly you will be able to select the costume at the 'Main' menu.

When you beat the 'Normal' difficulty setting this tougher mode will become an available option.

Collect the action figures throughout the game to earn challenges against a Wolverine in various costumes. If you beat the challenge that particular Wolverine costume will then become an available option.

Unlock Blue/Yellow Wolverine Classic Wolverine:
Challenge complete

Unlock Brown/Yellow Wolverine Legendary Wolverine:
Challenge complete

Unlock X-Force Costume X-Foce Wolverine:
Challenge complete