From Wikipedia: BattleBots: Design & Destroy was released on August 31, 2003 for the Game Boy Advance. It was stated that the game was the sequel to BattleBots: Beyond the BattleBox; but it actually is the same game released under a different name, albeit with some bugs fixed. It was possible that the game was released to pick up sales from gamers mistaking it for the PC game Robot Arena 2: Design & Destroy.