Bart tries to add more costumes to his repertoire so he can fight crime better.
Bart realizes he needs better costumes to fight crime and forces Milhouse to sew some for him. Bart then wears some of them all at once, perceiving him to be gaining weight in Marge's eyes but in Homer's eyes, he's proud of him. Unfortunately, Bart's overdressing is his downfall and he collapses. Bart is forced to spend a week in hospital but Bartman still does crimefighting, it's Milhouse subbing for Bart and complaining that his glasses fog up. Bart then tells him that's why superheroes don't have glasses.