Dark Momoka shows up when she sees Tamama being beaten up by an alien dog, Giroro's day at the beach turns dangerous, and Sgt. Frog continues his attempts to get back at Natsumi.
While Keroro has the ultimate opportunity to take over Earth, he decides to use his powers for good and creates a plastic model of himself, which comes in handy when the Hinata household receives an unexpected visitor.
Sergeant Keroro and the others face off against a mysterious foe; Giroro's belt is stolen; and everyone is shocked when Tamama is made the new general.
Fuyuki accidentally contacts Planet QQ with the Kero ball; the planet of swindlers has had its eye on Keroro to the tune of one billion Q's; and, a ski holiday turns into a beauty contest.
After losing his top-secret weapon, Sgt. Keroro, a frog-like alien, is cut off from his homeland and the rest of his platoon, forcing him to take a job as a nanny.
