From wikipedia: Jimmy Neutron vs. Jimmy Negatron is a video game for the Game Boy Advance and PC. In the game, the player plays as Jimmy Neutron as he tries to stop his evil doppelganger, Jimmy Negatron, from his evil deeds. It was published by THQ and Nick Games and developed by AWE Games (PC) and Human Soft (GBA). This is the only Jimmy Neutron video game that is not movie based. The game has a demo for SpongeBob SquarePants: Employee of the Month which was released around the same time.