Each cheat is entered on the Title Screen, and is confirmed by a sound effect.

Effect	Code
Infinite Ammo	At the Title Screen press Select, Up, Up, Select, Down, Down, you will hear a confirmation sound.
Infinite Health	At the Title Screen press Left, A, Up, Right, A, Down, you will hear a confirmation sound.
Stage Select	Replaces Password Menu At the Title Screen press Up, Down, B, B, A, you will hear a confirmation sound.