Just in case you don't have a clue on what GBA stands for. Its game boy advance. Well metabot was a japanese cartoon series which has been adapted to a game. It is pretty fun. You control your pet robot and then fights with other people in the game. There's a plot in the game which i sadly forgot but if im not mistaken, your goal is to retrieve all the medals to make your robot the best ever. Its a pretty fun game but it can now be called classic :D