Continuity mistake: When Jimmy Neutron is giving birthday presents to his mum he pulls out a necklace and some earrings from a bag. His mum only takes the necklace from him but the earrings are no longer in his hand.
Continuity mistake: In the opening sequence, Jimmy uses a long string from Carl's shirt to help launch the satellite. Jimmy then launches Carl from the rocket. That same morning, Jimmy finds Carl hanging from a tree, and his shirt is intact.
Trivia: If you have seen Kung Pow: Enter the Fist (which stars Steve Oderkerk, who wrote Jimmy Neutron) it ends with a giant monster's foot stepping beside the main character's. This foot is the same foot as the giant chicken monster in this movie.