To become faster, pause the game. Then (while holding the Right Shift button), press RIGHT, X, LEFT, RIGHT, A, DOWN, Start, RIGHT, RIGHT, DOWN.

To hurl ice balls, pause the game. Then (while holding Right Shift button), press RIGHT, Y, RIGHT, DOWN, RIGHT, RIGHT, B, LEFT, UP, RIGHT.

To become invincible, pause the game. Then (while holding the Right Shift button), press B, A, DOWN, A, DOWN, DOWN, DOWN, UP, DOWN, RIGHT.

To display the credits, pause the game. Then (while holding Right shift button), press C, LEFT, UP, RIGHT, LEFT, RIGHT, DOWN, DOWN.

To hurl fireballs, pause the game. Then (while holding Right Shift button), press C, UP, RIGHT, RIGHT, Y, B, UP, RIGHT, UP.

To jump higher, pause the game. Then (while holding the Right Shift button), press DOWN, UP, Start, RIGHT, RIGHT, DOWN, Left Shift, RIGHT, Start.

To open all doors in all levels, enter the password: RBYPRXYL.