Robert "Bob" Shellhorn is an American animation director. He was a producer and director on Muppet Babies and All-New Dennis the Menace. His directing work includes shows such as The New Scooby and Scrappy-Doo Show, Smurfs, Jem, G.I. Joe, Teenage Mutant Ninja Turtles, Darkwing Duck and The Wild Thornberrys. Recently he has been working as an animation timer on D.C. Comics' direct-to-video releases such as Batman: Under the Red Hood and Superman/Batman: Apocalypse.