I have a gameshark and I am trying to use codes for my pokemon crystal game. Every time i put a code in it never works. It doesnt even seem like the codes are activated. Now i put my pokemon crystal as a choice and i put codes under it and have clicked on the to be "entered" then i go back to the main menu and go to enter codes and they are already in there so i click start and then go to start the game. I start the game and it doesnt work at all.