Bart Simpson's Creatures are terrible goblins created by Bart Simpson's DNA and the main antagonist race in the crossover between the two TV shows The Simpsons and Futurama.
After their creation, they destroy much of New New York, they also killed Linda von Schoonhoven while she leads the news, but Morbo escapes in time.
At first, the Planet Express members wanted to kill either Homer or Marge, believing that either one of them is responsible, but it turns out to be Bart, so the team decides to kill him to prevent the catastrophe. But in the end, it turns out that Bart accidentally put his sandwich (containing his DNA) in the time capsule, and it came into contant with Milhouse's lucky rabbit foot and some toxic ooze, which created the creatures in the first place. As such, the Simpson family and the Planet Express join forces to finally defeat the Goblins by sending them into space on a spaceship.