Important Note on Using GBA Cheat Codes...
If you activate too many cheats, the game software will not know how to handle so many changes. Your GBA will let you know when you have too many active by giving you and error message that states, "Too many codes are activated. Some will not be running. Press Start.". If you press Start, your GameShark software will seem to hang. If you get this error message, it is best just to turn your GBA off, instead of pressing Start. When you turn the GBA back on, activate fewer cheat codes to avoid this.