Instructions
Insert the "Pokemon" GBA game into the game slot on your GameShark GBA device.
Insert the GameShark GBA device into the game slot on the GBA. Turn the switch on your GameShark GBA device to the "On" position.
Turn on the GBA. Select your "Pokemon" game from the list of available games.
Select the codes you would like to activate in your game's code list, then press the "Start" button to begin playing your game with the cheats activated.