Dwarf planet to gradually become tidally locked, such that it always presents the same face to its companion. An extreme example of this is the Pluto–Charon system, where both bodies are tidally locked to each other. Earth's Moon is also tidally locked, as are many satellites of the gas giants. The upper and lower size and mass limits of dwarf planets have not been specified by the IAU. There is no defined upper limit, and an object larger or more massive than Mercury that has not "cleared the neighbourhood around its orbit" would be classified as a dwarf planet. The lower limit
The Adventures of Pluto Nash become stranded on the Moon and desires to earn some money by which to pay for transport back to Earth to Salt Lake City. Because her father "Nicky Sticks" was a friend of Pluto's, she seeks help from Pluto, offering her skills as a singer. Pluto instead gives her a job as a server at his club and allows her to remain inside to sleep after its nightly closure to the public. During the same night, Pluto is accosted thrice by Mogan (Joe Pantoliano) and Kelp (Victor Varnado), messengers of a mysterious entrepreneur called Rex Crater. They tell Pluto that