Tom Hanks, R. Lee Ermey, Tim Allen, Annie Potts, John Ratzenberger, Wallace Shawn, Jim Varney, and Don Rickles in Toy Story (1995)
Woody and Buzz Lightyear
Movies are filled with the notion where arch-rivals become friends or team up against a common enemy.
Which is your favorite pair that started as rivals or enemies and grew to become friends in a movie?