Unlike Smarty, Wheezy and Psycho, Stupid is extremely overweight. Stupid is pigeon-toed and wears a blue and gray striped T-shirt, a red beanie with a yellow propeller, and dingy blue and white sneakers with untied laces. His weapon of choice is a baseball bat with a nail hammered through the top.
He is so stupid that he is shown hitting himself over the head with his own weapon while laughing. He has one line in the film, when he excitedly informs Judge Doom that Toontown is on the other side of the wall in the Acme Factory, which he and Wheezy are drilling open. He is the first weasel to die after losing control of his laughter, and his body is seen clutching a lily.
Role in the film
Stupid is first seen exiting the Toon Patrol car with the other weasels. Later, he is searching Eddie Valiant's office for Roger Rabbit and when he starts laughing, Smarty throws a toilet plunger on his snout to silence him. When Stupid begins laughing again in the bar, Judge Doom throws a record into his mouth. Stupid then tries to stop Eddie from escaping but fails. Stupid is not seen again until the film's climax where he is put in charge of working the Dip machine's controls, and then later dies laughing.
- Despite Stupid's ostentatious stupidity, he is seen deftly working the Dip machine's controls, suggesting he does have some intelligence, and he obeys Doom's orders to the letter rather than goof off as one might expect. It is possible that Stupid is a more subtle case of the same phenomenon seen with Baby Herman — where the role and personality a Toon's appearance suggests does not actually match who they are as a person.
- At one point in the movie, Smarty warned Stupid that he will die laughing as a way to get him to stop. Aptly enough, this is exactly how the entire Toon Patrol end up dying, save Smarty.
- Stupid is the only weasel to have a belly button.