Carrotblanca (1995)
Carrotblanca is a 1995 8-minute Looney Tunes cartoon. It was originally shown in cinemas alongside The Amazing Panda Adventure (in the US) and The Pebble and the Penguin (outside the US). It was subsequently released on video packaged with older Looney Tunes cartoons and was included in the special edition DVD, and later HD DVD and Blu-ray, releases of Casablanca, the film to which it is both a parody and an homage. At the time of release, WB did not own the rights to Casablanca (such rights were with Turner Entertainment - they still technically hold the film today, but now WB is responsible for distribution).
More at Wikipedia.