Mr. Big is a one-time character, an anthropomorphic Toon mouse and the main antagonist of the episode, Hamster Houseguest from Disney's Bonkers.
Despite his name, Mr. Big is actually short. He was one of the two actors on The Mr. Big and Tiny Show. Mr. Big hadn't had a show in 12 years since he and his co-star Tiny the Hamster had retired.
Mr. Big is a short and slender magenta anthropomorphic mouse with yellow eyes and a black nose, and also, he wears green shorts with blue overalls, green hat with blue band.
Mr. Big is one of the four criminals that Bonkers needs to arrest in the Sega Genesis game.