The Gameboy Evolution is composed of all the stages the Nintendo Gameboy evolved from. First came the simple Gameboy. (also known as the caveboy) Second, the Gameboy Pocket. Third the Gameboy Color. Fourth the Gameboy Advance. And last is what we now call the Gameboy SP, the most magnificent handheld game ever created. What will come next? Who knows? (the guys already making the new stuff)