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 and the Pirate Ghost", followed in 2009. The Mystery Machine has been used as the basis for many die-cast models and toys, such as from hotwheels. By 2004, the various "Scooby-Doo" merchandise had generated over in profit for Warner Bros. Licensed merchandise also sold in 2015, in 2016, and in 2017. During its four decade broadcast history, "Scooby-Doo" has received two Emmy nominations: a 1989 Daytime Emmy nomination for "A Pup Named Scooby-Doo", and a 2003 Daytime Emmy nomination for "What's New, Scooby-Doo"s Mindy Cohn in the "Outstanding Performer in an Animated Program" category. Science advocate Carl Sagan favorably compared