gameboid does not have the ability to use gameshark codes. at least not directly. if you google gameboid gameshark, you will come across various posts of people using vba (visual boy advance) to use permament codes (more money, stat hacking, pokemon, etc). Keep in mind, this uses the in game save, not a save state. I haven't tried this, so I don't know how easy it is, but I bet you can get help if you have problems from whatever forum you find the info.