Disney animation has been parodied for more than half a century, including the classics Bambi Meets Godzilla, Mickey Mouse in Vietnam, and an Italian satire of Fantasia in which alien life evolves from a soda bottle.
Making parodies of films by a company as famously protective of its copyright as Disney is risky, but a few people have been up to the challenge. Usually underground or student animators, and usually short black and white efforts, but undeniably bold nonetheless.
Two of the more famous parodies came out of 1969. Bambi Meets Godzilla portrays the first meeting between the Disney and Toho characters, set to classical music and then a slowed-down chord from The Beatles. Despite its simplicity and brevity, the film is considered one of the classics of 20th century animation. You can watch it below, assuming that YouTube doesn’t pull it for copyright infringement:
Mickey Mouse in Vietnam also premiered in 1969, and was (of course) made as a protest against the Vietnam War. Mickey joins the army to see the world, but only manages to see one small part of it:
Mickey Mouse in Vietnam was apparently directed by Whitney Lee Savage, the father of MythBusters‘ Adam Savage, and produced by Milton Glaser, who designed the iconic “I love NY” poster.
Finally, there’s Allegro Non Troppo. It’s a full feature film parody of Fantasia, with a range of inventive and cheeky sequences set to classical music. I quite enjoyed the sequence inspired by The Rite of Spring, which involves life evolving from a discarded cola bottle:
Or the sequence in which a cheerful cartoon bee is interrupted by, and then interrupts, an amorous couple rolling in the flowers:
The Generalist Academy 
.jpg){kind=link}