Episode Detail: The Eggpire Strikes Back - The Adventures of Jimmy Neutron, Boy Genius
Part 1 of two. Egg-shaped aliens known as the Yolkians land in Retroville, giving out presents to show good will to the townspeople, who, with the exception of Jimmy, are easily won over. Jimmy's parents even go so far as to invite the leader, King Goobot, to stay as their houseguest. Meanwhile, King Goobot's loyal sidekick, Ooblar, takes over Miss Fowl's classroom and casts Cindy Vortex in the role of new star pupil.