Instructions
Open the cheats menu and select the option labeled "Cheats List."
Check to see if your cheat codes have been activated. Entering a cheat code into your VBA does not automatically activate it - you must click on the box next to the code to turn it on.
Enter the game's master code. A master code must be entered and activated for all games for you to use other cheat codes for that game.
Double check the codes you entered and the cheat devices you selected. If you entered GameShark codes, but selected the GameGenie option, the codes will not work.
Reinstall your VBA if you still cannot get your VBA to recognize the cheat codes.