Mickey D was a character from the novel Hotel Royale by Todd Matthews.
A "nefarious lothario," Mickey owned the titular hotel and casino and had Rita as his girlfriend. Though his presence is felt throughout, Mickey D appears only during the climax of the novel when he returns to the hotel to murder the bellboy shortly before the hotel is sold to three foreign investors.
In 2044, a physical representation of Mickey D was created by an unknown alien force on the planet Theta VIII in an effort to provide a simulation of normal life for Colonel Stephen G. Richey who had crashed on the planet. (TNG: "The Royale")
Mickey D was played by Gregory Beecroft.