who is the creator of it?
Pete Docter.
Monsters, Inc.
Docter began developing the film in 1996, 
who does the voice of sully in monsters inc John Goodman. is it a film or tv series? Film. genre? Computer-animated comedy film.
wiki:13594170
Monsters, Inc. [SEP] Introduction
Docter began developing the film in 1996, and wrote the story with Jill Culton, Jeff Pidgeon and Ralph Eggleston. Stanton wrote the screenplay with screenwriter Dan Gerson. The characters went through many incarnations over the film's five-year production process. The technical team and animators found new ways to render fur and cloth realistically for the film. Randy Newman, who composed the music for Pixar's three prior films, returned to compose its fourth. "Monsters, Inc." was praised by critics and proved to be a major box office success from its release on November 2, 2001, generating over $577 million worldwide and becoming the third highest-grossing film of 2001.