Ice power-up:
During game play, pause, hold R1 and press Circle(2), Left, Down, Circle, Up, Right.

Invincibility:
During game play, pause, hold R1 and press X, Square, Down(2), Up, Down, Right.

100 lives:
During game play, pause, hold R1 and press Up, Circle, Triangle, Down, Right, Square, Down.

Stage select:
Go to the level selection dome and press R1 + Select. Then press X, Square, X, Right, Up, Left, Circle(2), Down(2).

Access all levels:
Go to a stage and press R1 + Select.. Then press Circle, Start, Right, Up, Square, Left(2), Up, Start.

Long ending:
During game play, pause, hold R1 and press Circle, Right(2), Down, Triangle, Down, Circle, Right(2), Down, Triangle, Down, Start. The extended ending of the game will be displayed. The scenes include sketches and graphics that were used during the game's development. This is the ending is normally seen only after the Planet X level has been completed.

Jump power-up:
During game play, pause, hold R1 and press X, Circle, Up(2), Down, Right(2).

Speed power-up:
During game play, pause, hold R1 and press Down, Start, Right(2), Down, Up, Start.

Fireball power-up:
During game play, pause, hold R1 and press X, Up, Right, Up, Right(2).

Lightning power-up:
During game play, pause, hold R1 and press Right, Left, Right, Circle, Triangle, Right, Circle, Down, Right.