Spoilers
Ernesto de la Cruz is the fifth character in a Pixar animated film to be revealed as the main antagonist in a surprising plot twist. The other four Pixar films to feature such a character are Toy Story 2 (1999) with Stinky Pete the Prospector, Monsters, Inc. (2001) with Henry J. Waternoose III, Up (2009) with Charles Muntz, and Cars 2 (2011) with Sir Miles Axelrod.