Things You'll Need
Instructions
Insert the Gameshark into your Gameboy the same way you would insert a cartridge.
Insert the cartridge you wish to play into the receiving slot of the Gameshark SP. Make sure the Gameshark is set to "on."
Turn on the Gameboy, and you will launch the Gameshark menu.
Find codes for the game you're playing by browsing the selection of preloaded titles on the Gameshark. If your game is not one of them, search for your title and compatible codes on the Gameshark website (see Resources).
Apply the codes of your choosing, and follow the menu prompt to launch your game.