Mortimer Mouse
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. A precursor to the character known as Mr. Slicker appeared six years prior in the Floyd Gottfredson comic Mr. Slicker and the Egg Robbers.
He was planned to be in Who Framed Roger Rabbit but ultimately deleted.