Unlimited Lives:

Go to the main menu. Hold R1 and press Circle,
Square, Circle, Square, Triangle, Start 
(if done correctly you should here a voice say
"What a Jerk!").


All Items:

Go to the main menu. Hold R1 and press X, X, 
Triangle, Circle, Circle, Start (if done 
correctly you should here a voice say 
"What a Jerk!").