Just like his fellow dinosaur friends, Dweeb was retrieved by Captain Neweyes and fed Brain Grain cereal, becoming intelligent and friendly in the process. He is first seen eating hot dogs with Woog the Triceratops and Elsa the Pterodactyl, when Rex the Tyrannosaurus Rex, another dinosaur fed Brain Grain, shows up and introduces himself. Dweeb tells Woog they've eaten 250 hot dogs before introducing himself to Rex and adding mustard on his hot dog. When the other dinosaurs express guilt over their past actions for when they were wild, Dweeb says that they've evolved as a result of their consumption of the Brain Grain.