Level select
Pause game play and press [A], [C], [Right], [A], [B].
Unlimited health
Pause game play and press [B], [Up], [B]x2, [A].
Unlimited lives
Pause game play and press [B], [A], [B], [Up].
Unlimited shuriken
Pause game play and press [Down], [A], [B].
Enable all codes
Pause game play and press [Right], [Up], [B], [A], [Down], [Up], [B], [Down], [Up], [B].