The Lemons are the main antagonists in Cars 2. They live in four main familys: Gremlins, Pacers, Trunkovs and Hugos. "Lemon" is a term used to describe a defective car.
- Sir Miles Axlerod, former leader of the lemons before he quitted and reformed.
- Professor Z, a German scientist, ex-second in command to Miles Axlerod, and new leader of the lemons.
- Victor Hugo, leader of the Hugos.
- Johnny Curby Gremlin, leader of the Gremlins.
- Tubbs Pacer, leader of the Pacers.
- Vladimir Trunkov, leader of the Trunkovs.
- Tyler Gremlin
- Fred Pacer
- Petrov Trunkov
- Alexander Hugo
- Petey Pacer
- Don Crumlin
- Tolga Trunkov
- Rick Trunkov