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. With a tall, slim physique and overbearing personality, Mortimer is the polar opposite of the stout and earnest Mickey. Mortimer’s whiskers, elongated snout, and prominent front teeth made him out to be more of a rat than a mouse, contrast to his name. Though Mickey's Rival was his only appearance in the theatrical shorts, Mortimer was reinvigorated in the early 2000s with prominent roles in Mickey Mouse Works and House of Mouse, in which he coined his catchphrase, “Ha-cha-cha!”.