[Galefore]

Probably Robopon and then there was some old Gameboy Color game where you raised a ball of scrap metal into a giant lethal killing machine. They were both bad Pokemon ripoffs, but the latter had a pretty interesting battle system. Still have Robopon and it's sequel (the first game was ok, the sequel was awful), but the weird scrapmetal game was probably given away and subsequently lost or sold. Can't remember which.