Bart Simpson is a character from The Simpsons. He appears in The Simpsons vs. SpongeBob SquarePants. He is voiced by Nancy Cartwright.
Bart is first seen with armor and a machine gun. He says that it's time to take guard and that's he's expecting a reaction from Bikini Bottom - in war. Homer doesn't care about it, while Marge doesn't want him to do this. However, Bart goes outside anyway and takes cover. After a few minutes, Bart comes running in, saying that he shot the jet out of the sky. "Yes! I killed SpongeBob!" he yells, when a huge jet, assumingly the one that he shot out of the sky, comes crashing down into their backyard. However, it turns out that it's Mr. Burns. Bart then runs down the street causing chaos while Homer, Marge, Lisa, and Maggie were still in the house.