What Pixar short film played before WALL-E in theaters?

The Pixar short film that played before WALL-E in theaters was Presto.

Presto was released theatrically in the United States on June 27, 2008, the same day as WALL-E, and served as the feature's animated curtain-raiser. Its story follows a stage magician whose rabbit, Alec, refuses to cooperate after the magician withholds his carrot. The short turns their backstage conflict into a rapid series of visual gags.

The title refers to the magician's performance style and evokes the magical exclamation associated with stage tricks. Pixar designed the short as a lively homage to classic theatrical cartoons, including the fast physical comedy associated with Looney Tunes and Tom and Jerry.

Viewers sometimes confuse Presto with other Pixar shorts such as For the Birds, Boundin', or Partly Cloudy. Those shorts accompanied different Pixar features or releases. Presto was specifically paired with WALL-E and was later included as a bonus feature on home-video editions. It was also nominated for the Academy Award for Best Animated Short Film.