I think they removed the gba slot to make it thiner. But then y not use the wireless to make a wireless slot 2. make all those gba games and ds games needing gba slot work. maybe it can attach to the bottom. and maybe have a dsiware or firmware update that makes it work. it can attach to the bottom also. its genius but will anyone be able to? would nintendo? i hope so in the future. i could play guitar hero again.