Pluto first appeared as a unnamed dog tracking the escaped convict Mickey in the film "The Chain Gang" (September 1930).
A month and a half later, Pluto appeared as Minnie Mouse's dog named Rover who comes along with her and Mickey on a picnic. By his third appearance, in The Moose Hunt (1931), Pluto is Mickey's pet, now named "Pluto".
Several months had passed between the naming of what was believed to be the ninth planet, Pluto, on March 24, 1930, and the attachment of that name to the dog character. Venetia Burney (later Venetia Phair), who as an eleven-year-old British schoolgirl had suggested the name Pluto for the planet, remarked in 2006: "The name had nothing to do with the Disney cartoon. Mickey Mouse's dog was named after the planet, not the other way around."
Although it has been claimed that Disney named the dog after the planet, rather than after the mythical god of the underworld, this has not been verified. Disney animator Ben Sharpsteen said "We thought the name [Rover] was too common, so we had to look for something else. ... We changed it to Pluto the Pup ... but I don't honestly remember why."
Pluto was initially a minor character until 1934 when Disney animator Norm Ferguson gave the dog a key role in the cartoon Playful Pluto.
Sailor Pluto was created in 1993.
Pluto Press was created in 1969.
Pluto Rising was created in 1999.
Playful Pluto was created in 1934.
Pluto Records was created in 1999.
Megachile pluto was created in 1869.
Passage to Pluto was created in 1973.
Mother Pluto was created on 1936-11-14.
The Pluto Files was created on 2009-01-26.
Pluto - Astro Boy - was created in 1980.
Pluto's Party was created on 1952-09-19.
Private Pluto was created on 1943-04-02.