1988, Hanna-Barbera Productions produced Hanna-Barbera Superstars 10 , a series of syndicated telefilms featuring their most popular characters, including Yogi Bear , Huckleberry Hound , The Flintstones , and The Jetsons . Scooby-Doo, Scrappy-Doo, and Shaggy starred in three of these movies: Scooby-Doo Meets the Boo Brothers (1987), Scooby-Doo and the Reluctant