Grem and Acer were Professor Z's goons in Cars 2. Grem is an orange Gremlin and Acer is a green Pacer.
- Grem was voiced by Joe Magenta and Acer was voiced by Peter Jacobson.
- Grem and Acer will become the enemies of Winnie the Pooh, Ash Ketchum, Littlefoot, Princess Twilight Sparkle and their friends in Pooh's Adventures of Cars 2.
- Grem and Acer retured in Thomas and Twilight Sparkle's Adventure with Spy Kids and Brian Griffin's Adventures of Transformers: Age of Extinction.
- Grem and Acer will become the enemies of Ryan, Crash, Thomas and their friends in Ryan's, Thomas' and Crash's Adventures of Cars 2.