From Nat Gertler's review of Sky High:
This film contains performances by both Patrick Warburton (voice only) and Bruce Campbell. Conceptually, this is the collision of matter and anti-matter. They both fill almost the same character role in Hollywood. Campbell is the guy who is cocky because he pictures himself as larger than life, and he is; Warburton is the guy who is cocky because he pictures himself as larger than life but isn’t. Both are really good at what they do. Anyone writing a character who can’t tell if it should be Warburton or Campbell hasn’t figured out the character.