I just got this and it is L337. It allows you to plat Game Boy Advance, Game Boy Color, and Game Boy games on the GameCube. It is a one-inch thick attachment to the bottom of the system (it actually makes the system more like a cube ). The resolution looks great on full screen. the GBP has options like 20 borders, normal and full screen, button confuguration and more. At a MSRP of $49.99 (free with purchase of new GameCube) it is cheaper than a new GBA SP. if you play your GBA a lot at home, then the GBP would be a great investment.

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