A hidden grab bag of gizmos in a cute kitty package, Sox is Buzz’s go-to friend and sidekick. But Buzz can’t do it alone-he shares space with a dutiful robot companion cat called Sox (voice of Peter Sohn). HERO’S BEST FRIEND - Disney and Pixar’s “Lightyear” is an all-new, original feature film that presents the definitive origin story of Buzz Lightyear (voice of Chris Evans)-the hero who inspired the toy-following the legendary Space Ranger on an intergalactic adventure.