Question: What year did funny animal cartoon character, Minnie Mouse, appear in  Mickey's Orphans?

Context articles: Mickey Mouse
Homer Pigeon
Mickey's Surprise Party
Pepito Chickeeto
Pooch the Pup
Julius the Cat
Minnie Mouse
Andy Panda
Pluto (Disney)
Mickey's Orphans

Mickey Mouse is a funny animal cartoon character and the official mascot of The Walt Disney Company.
 He was created by Walt Disney and Ub Iwerks at the Walt Disney Studios in 1928.
 An anthropomorphic mouse who typically wears red shorts, large yellow shoes, and white gloves, Mickey has become one of the world's most recognizable characters.
Homer Pigeon is a Walter Lantz funny animal cartoon character, who made his first appearance in the cartoon "Pigeon Patrol", in 1942.
 His final appearance was in 1964, in The Woody Woodpecker Show episode "Spook-A-Nanny".
 He also makes cameo appearance in Toontown in "Who Framed Roger Rabbit".
 He was seen walking with some of the other animals from "The Tortoise and the Hare".
Mickey's Surprise Party is a 1939 Walt Disney commercial cartoon that promotes Nabisco products.
 It stars Mickey Mouse, Minnie Mouse, Pluto, and Fifi.
 This is the first cartoon of Mickey Mouse and Minnie Mouse with their current designs.
 This is notable for being the first Disney commercial short sponsored by a company, and one of a few Disney cartoons to be in the public domain.
 Walt Disney hated the idea of public commercials, and swore he would not do one until then.
 The cartoon was shown at the 1939 New York World's Fair.
 This cartoon was included in the VHS release "The Spirit of Mickey", with all the Nabisco packaging replaced by generic products, and all of Mickey and Minnie's lines referencing the names of the products overdubbed by Wayne Allwine and Russi Taylor.
 However, most DVD versions of the short contain the original uncut version, replete with the Nabisco references.
 Milk Bone Dog Biscuits, referenced in the original version of the film, made by Nabisco at the time of the short's production, have since been acquired by Del Monte's pet food division.
Pepito Chickeeto is a Walter Lantz funny animal cartoon character, who made his first and only appearance in the cartoon "The Bongo Punch", in 1957.
Pooch the Pup is a funny animal cartoon character, an anthropomorphic dog, appearing in Walter Lantz cartoons during the studio's black-and-white era, and is the first recurring character to be made by Walter Lantz.
 This character, however, only appeared in thirteen shorts, and only two are available on video so far.
Julius (the Cat) is a funny animal cartoon character, starring in the first animated series created by Walt Disney, the "Alice Comedies", making him the predecessor of Oswald the Lucky Rabbit and Mickey Mouse.
 Julius is an anthropomorphic cat, appearing intentionally similar to Felix the Cat.
 A bold and inventive hero, he gradually became the primary focus of the "Alice Comedies", to the point Disney abandoned live action for pure animation on subsequent projects.
Minnie Mouse is a funny animal cartoon character created by Ub Iwerks and Walt Disney.
 She and Mickey Mouse were first drawn by Iwerks in 1928.
 The comic strip story "The Gleam" (published January 19–May 2, 1942) by Merrill De Maris and Floyd Gottfredson first gave her full name as Minerva Mouse, although this is seldom used.
Andy Panda is a funny animal cartoon character who starred in his own series of animated cartoon short subjects produced by Walter Lantz.
 These "cartunes" were released by Universal Pictures from 1939 to 1947, and United Artists from 1948 to 1949.
 The title character is an anthropomorphic cartoon character, a cute panda.
 Andy became the second star of the Walter Lantz cartoons after Oswald the Lucky Rabbit.
 He achieved considerable popularity until being eventually supplanted by Woody Woodpecker.
Pluto, also called Pluto the Pup, is a cartoon character created in 1930 at Walt Disney Productions.
 He is a yellow-orange color, medium-sized, short-haired dog with black ears.
 Unlike most Disney characters, Pluto is not anthropomorphic beyond some characteristics such as facial expression, though he did speak for a short portion of his history.
 He is Mickey Mouse's pet.
 Officially a mixed-breed dog, he made his debut as a bloodhound in the Mickey Mouse cartoon "The Chain Gang".
 Together with Mickey Mouse, Minnie Mouse, Donald Duck, Daisy Duck, and Goofy, Pluto is one of the "Sensational Six"—the biggest stars in the Disney universe.
 Though all six are non-human animals, Pluto alone is not dressed as a human.
Mickey's Orphans is a 1931 American animated short film produced by Walt Disney Productions and released by Columbia Pictures.
 The cartoon takes place during Christmas time and stars Mickey Mouse, Minnie Mouse, and Pluto who take in a group of disruptive kittens.
 It was directed by Burt Gillett and features the voices of Walt Disney as Mickey and Marcellite Garner as Minnie.