The Yolkians have come to earth but this time they seek out only peace and brotherhood with the people of Retroville. But while they integrate themselves into society, Jimmy Neutron suspects the worst. Who could forget how the evil egg-shaped aliens tried to sacrifice the entire adult population of Retroville to the ravenous chicken god Poultra? Everyone apparently. Just when Jimmy is about to give in and make peace like everyone else, he discovers some evidence that reveals the Yolkian's true intentions. Inventions: Burp-Powered Jet Pack, Tungsten-lined Scan-ready DNA Regenerator, X-Ray Specs, Cheese Ray, Invisible Pills.