Mickey Mouse- Mickey's Rival (1936)

In this 1936 cartoon short Mickey's Rival, Mortimer Mouse is introduced as Mickey's competition for Minnie's affections.

Mickey Mouse - The Karnival Kid (1929)

The Karnival Kid is a Mickey Mouse short first released on July 31, 1929. Although it was Mickey's ninth short, it was the first in which he actually spoke. Mickey's first spoken words were "Hot Dogs!"