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 Witch's Ghost Billy Ray Cyrus performing "Scooby-Doo, Where Are You!". "Scooby-Doo and the Alien Invaders" was released on October 3, 2000. Scooby-Doo! and the Witch's Ghost Scooby-Doo and the Witch's Ghost is a 1999 direct-to-video animated supernatural horror-comedy film, and the second of the direct-to-video films based upon Hanna-Barbera's "Scooby-Doo" Saturday morning cartoons. It was released on October 5, 1999, and it was produced by Warner Bros. Animation (although it contained a "Hanna-Barbera Cartoons, Inc." copyright and logo). The Mystery Inc. gang (Scooby-Doo, Shaggy, Fred, Daphne and Velma) travel to a New England town called Oakhaven after being invited by horror writer