Mortimer Mouse is an anthropomorphic mouse and Mickey Mouse's longtime rival. Portrayed as an arrogant, lecherous, yet charismatic shyster, Mortimer made his animated debut in the 1936 short, Mickey's Rival, in which he vied for Minnie Mouse's affections against a jealous Mickey.

Is Mortimer Mouse related to Minnie Mouse?

Her best-known relatives, however, remain her uncle Mortimer Mouse (Mortimer was almost the name of Mickey) and her twin nieces, Millie and Melody Mouse, though most often a single niece, Melody, appears.

Who is Mortimer Mouse in Mickey Mouse Clubhouse?

Maurice LaMarche is the voice of Mortimer Mouse in Mickey Mouse Clubhouse.