Mister Cheeks is an evil, extraterrestrial hamster-like being from an unknown homeworld and species that has a desire to take over the planet Earth - his plan being to turn the world into a massive "hamster" ball. He is a known sociopath, having tried to destroy Millie simply because when she's at school she pets his head backwards, much to Mr. Cheeks' discomfort. Unlike Kat, Mr. Cheek's only power is the ability to speak human language, although he has superior technology in comparison to that used by the Catnipians. His assistance is a chicken named Cacciatore.