B, A, SELECT, SELECT, B, A, LEFT, LEFT,
Access Cheat menu (level select and permenent shield)
LEFT, A, SELECT, SELECT, UP, UP,
Invincibility In Classic Mode
Left, R, L, Right, Left, R, L, Right
Special Mode
B, A, DOWN, B, A, DOWN, B, UP, SELECT
Unlock Maniacal Skill Level