Simon Woosterfield

Simon Woosterfield is a rich boy who looks exactly like Bart (who described Simon as a "nerd version of himself"). They found out about this in a bathroom and, after listening to each other's problems, they decided to switch lives.

History
Simon's older half-brother and sister, Devan and Quenley, wanted to kill him to inherit the entire Woosterfield fortune. Simon lived Bart's life the entire day, but he and Homer argued because of Homer's way of eating, and Simon was left without eating. However, he enjoyed Marge's loving upon going to bed. Lisa suspected that he was not Bart. Simon tells them of Devan and Quinley trying to kill him at the ski trip at aspen. After Simon's half-brother and half-sister almost kill Bart (and then try to kill each other thinking Simon is dead), they switch lives again. Homer asked Simon about his half-brother and half-sister wanting to kill him, he doesn't worry about that. Then, upon seeing their lives, Homer begs to come with Simon but the car drives off.