Gex
First pause the game and press and hold R1, then enter any of the following codes with R1 held:
Effect: Code:
Infinite Lives – UP, Circle, Triangle, DOWN, RIGHT, Square, DOWN.
Ice Weapon – Circle(x2), LEFT, DOWN, Circle, UP, RIGHT.
Super Jump – X, Circle, UP(x2), DOWN, RIGHT(x2).
Fire Balls – X, UP, RIGHT, UP, RIGHT(x2).
Invincibility – X, Square, DOWN(x2), UP, DOWN, RIGHT.
Electricity – RIGHT, LEFT, RIGHT, Circle, Triangle, RIGHT, Circle, DOWN, RIGHT.