At the beginning of Toy Story 3, The Pizza Planet Aliens play the henchmen of One-Eyed Bart.
Toy Story 3 Opening Scene
In Andy's realistic play scenario, The Aliens are serving as evil accomplices of One-Eyed Bart (Mr. Potato Head's character) and Betty (Mrs. Potato Head's character), providing transportation for their escape by a pink corvette. The corvette is sliced in half by Buzz Lightyear's laser, and One-Eyed Bart protects himself, his wife and the Aliens by summoning his "Attack Dog with Built-in-force-field" (Slinky's role). The villains are warped to Evil Dr. Porkchop's spaceship.