The following is a list of all The Adventures of Jimmy Neutron, Boy Genius episodes.
Carl brings the alien, which he calls a "Twonkie", to class, and it produces multiple off-springs.
Jimmy and the citizens of Retroville must stop and capture the dangerous rampaging Twonkies and send them back to their comet before it leaves Earth's orbit.
King Goobot is back again, and recruits every villain Jimmy has ever defeated to be part of his new army to get revenge on him.
Jimmy enters Goddard in a pet contest, and because he's a machine rather than an organic flesh and blood dog, he gets disqualified.