Gameshark Codes
Tested on Version 2.1
Warning!!!! These codes might delete a saved game. When I tried them they didn't delete my saved game, but I have version 2.1. If it does delete your saved game put in the code B123D7CF. I have not lost a saved game yet so I don't know if it works so USE THESE CODES AT YOUR OWN RISK.
If your gameshark doesn't work with pokemon then turn your gameshark to normal and start pokemon. When in the game turn the gameshark on and it should work. It may take several times to get it to work.