Weekenders and The Adventures of Jimmy Neutron - Boy Genius: Attack of the Twonkies
Jimmy is preparing for a long-awaited event. That event is Twonkus-3's orbit around Earth, which it only makes once a year. Jimmy then finds what he came for: samples of rock on the comet. After a close call with a hostile alien life form on the comet, Jimmy returns home only to find that a cute and cuddly alien has stowed away on his ship in his sand samples. Despite Jimmy's warnings about the dangers of keeping aliens as pets, the Twonkies become huge attractions, and soon everyone owns one. But when the twonkies undergo an evolution thanks to good music, they threaten to take over Retroville! However, Jimmy soon finds out that Sheen's Twonkie is the only one that didn't evolve, and that's because Sheen's singing voice is that little bit noisy. Jimmy takes advantage of this when a monster identical to the one he had seen earlier on the comet returns to destroy Retroville.
Meanwhile, Hugh spends all of Judy's grocery money on a dummy named Flippy, who instantly gets on her nerves. It is used as rocket fuel for the evolved Twonkie monster to get home. However it is shown that Jimmy forgot to send Sheen's twonkie back to the comet. He jumps on the sill of Sheen's window and coughs up two new baby Twonkies which run loose in Retroville and the episode ends with a card that says "The End?" with the pink baby twonkie as the period under the question mark.