Mr. B is an alien in the Pixar animated short Lifted.
Lifted
He is regularly in control of the UFO, but lets Stu take control one night and attempt to capture a human named Ernie. After several failures, Mr. B takes control instead, and puts everything in the house back to where it was.
Trivia
- Gary Rydstrom said Mr. B's name came from the fact that the character's teacher would only give him B grades.
Gallery
Mr. B. (left) with Stu (right)
A diagram showing the steps Pixar took to create Mr. B