In Cars 2, Don Crumlin is one of many Lemons working at the Oil Rig. Once C.H.R.O.M.E. agent Finn McMissile is spotted spying on the Lemons' plans, Crumlin and many others chase after the agent in an attempt to capture him. Unfortunately for him, he exploded with many lemons.
- He is named after Pixar production worker and animator Don Crum.
- In Cars 2: The Video Game, several purple Gremlins identical to him appear in Attack and Hunter mode as cars that the player has to destroy. They can shoot missiles or machine guns, putting them in the hard difficulty.
- In the film, a Gremlin similar to him is seen, but with a darker purple, so he didn't actually appear in the movie at all.
- Like Roger Wheeler, his car-pun name is used as a normal human name.