This USB data cable is compatible with both the Action Replay GBA and GameShark GBA models. This cable is used to connect your Action Replay device to your computer to allow you to add cheat codes to the Action Replay or GameShark catrdige. Action Replay and GameShark have cheats for nearly ever Nintendo game. Action Replay and GameShark are used for Pokemon games because it allows you to get unlimited amounts of items/TMs. It can even allow you to get any Pokemon you want!