Scooby-Doo the head story editor on "Scooby-Doo" since 1983. Following the first season of "A Pup Named Scooby-Doo", Ruegger and much of his unit defected from Hanna-Barbera to Warner Bros. Animation to develop "Steven Spielberg Presents Tiny Toon Adventures" and later "Animaniacs", "Pinky and the Brain", and "Freakazoid!". From 1987 to 1988, Hanna-Barbera Productions produced "Hanna-Barbera Superstars 10", a series of syndicated TV movies 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 Ghoul School" (1988),
Scooby-Doo among its members. "Scooby's All-Star Laff-a-Lympics" was retitled "Scooby's All Stars" for the 1978–79 season, reduced to 90 minutes when "Dynomutt" was spun off into its own half-hour and the 1969 reruns were dropped. "Scooby's All-Stars" continued broadcasting reruns of "Scooby-Doo" from 1976 and 1977, while new episodes of "Scooby-Doo" aired during a separate half-hour under the "Scooby-Doo, Where are You!" banner. After nine weeks, the separate "Where are You!" broadcast was cancelled, and the remainder of the 16 new 1978 episodes debuted during the "Scooby's All-Stars" block. The 40 total "Scooby-Doo" episodes produced from 1976 to 1978 were later