Boo’s arrival disrupts and challenges the duo’s long-held beliefs about the nature of human children, which is a crucial lesson in acceptance and having a broader understanding of those who are different.
What makes Monsters, Inc. so fantastic, aside from its fantastic world-building and cutting-edge animation, is Sulley and Mike’s profound journey of self-discovery. Boo’s arrival disrupts and challenges the duo’s long-held beliefs about the nature of human children, which is a crucial lesson in acceptance and having a broader understanding of those who are different. This, combined with some terrific vocal performances from the likes of John Goodman, Billy Crystal, and Steve Buscemi, has helped turn this film into an animated classic.