King Goobot gathers several of Jimmy's enemies and they team up to defeat him once and for all. When Jimmy and Sheen are captured, it's up to Carl, Cindy and Libby to rescue them.

Jimmy is enlisted as a spy by the Big Top Secret Organization. His mission: find and rescue Agent X - who turns out to be Jimmy's movie hero, Jet Fusion.

The Yolkians have come to earth, but this time they seek out only peace and brotherhood with the people of Retroville. While Jimmy Neutron suspects the worst, everyone in town is ready to forgive and forget. This special serves as a direct sequel to the Jimmy Neutron movie.