Each cheat is to be entered on the Title Screen. You will hear a confirmation sound effect upon correct entry.

Effect	Code
Infinite Lives	Select, A, Down, B, Up, Down.
Infinite Projectiles	B, A, Right, B, A, Right, A.
Infinite Time	Up, Down, Up, B, Left, B.
Invulnerability	Right, A, Down, Right, A, Down.
Level Select	Select, Up, Up, Select, Left, Left.
Special 1	Up, B, A, Down, B, A.
Special 2	Left, A, Left, B, Left.