Well I did figure out how to use gameshark codes for my visual boy however, I have another problem. When I used some codes I was then unable to open my TM case without the game freezing. I even started a new game without using any TM type codes and the same thing happened. So my question is how can I beat this game without my TM case because it also contains the key items? Is there a gameshark code so you don't need key items?