Exo Cookie is a hamster running in a futuristic hamster wheel which has four robotic legs and equipped with gatling guns and laser cannons.
- Attack: Cataclysmal
- Life: Tank
- Speed: Very Slow
"Exo-Cookie is at the origin of everything in Darwin's life, believe it or not. When he was only 7 years old, he could not bear the idea that his favorite hamster would only live 3 to 4 years tops. Darwin therefore did everything that was in his power to extend its lifespan.
He was surely stunned when he discovered that his first experiment turned his little Cookie into a Hulk-like hamster! Travelling at the speed of light and destroying everything in its way; Darwin had to give him a new name and to build him a suitable piece of equipment. Let's just say that this success opened the way to what Darwin has become.
Exo-Cookie has now entered the arena, he may seem cute but be sure he will be pitiless towards his opponents!"
- This mutant may have been inspired by the guinea pigs in the animated film G-Force.
- Despite its appearance and Mutopedia Entry, this mutant is ironically one of the slowest mutants in the game.