Click here to read more about it. Essentially this is a device that will allow you to play GameBoy Advance titles on your GameCube. The device plugs into one of the ports on the bottom of the GCN. You plug the GBA games into this attachment and add in a GBA emulator disc disc tray. Viola! GBA games on your TV! Naturally, this device will also also play regular GameBoy and GameBoy Color titles. Whether it will enhance these games in any way is still unknown. All I can say is, hallelujah! This is a device I could certainly use. I love the idea of playing some GBA games on my TV. I know the Super GameBoy was one of the better gaming investments I ever made.