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.
Jimmy's newest invention lets Sheen actually be a player in his favorite video game! He enters UltraLord Versus Robo-Fiend and is later joined by Jimmy. But when Carl enters in Llamapalooza, Jimmy's faced with the real problem of getting them all back into the real world. Invention: Neutronic Game Pyramid.