S19E13 The DeBarted
Thanks to the kids' antics Marge prangs the car and whilst it's in for repairs the family get a state of the art new model,with which Homer is reluctant to part until he sees the old one being sold off. Bart,meanwhile,thinks he has found a kindred spirit in new class-mate Donny,who's even naughtier than him. Then he gets tipped off by Willie that Donny is a spy, brought in by Skinner to ensure prank-free school days. Bart corners Donny in an old warehouse but when Skinner and Chalmers appear to mete out the punishment Donny comes to Bart's assistance.