Scooby-Doo the series and the billing, in an attempt to boost "Scooby-Doo"s slipping ratings. The 1979–80 episodes, aired under the new title "Scooby-Doo and Scrappy-Doo" as an independent half-hour show, succeeded in regenerating interest in the show. Lennie Weinrib voiced Scrappy in the 1979–80 episodes, with Don Messick assuming the role thereafter. Marla Frumkin replaced Pat Stevens as the voice of Velma mid-season. As a result of "Scooby-Doo and Scrappy-Doo's" success, the entire show was overhauled in 1980 to focus more upon Scrappy-Doo. At this time, Scooby-Doo started to walk and run anthropomorphically on two feet more often, rather than on
Scooby-Doo 2: Monsters Unleashed Scooby-Doo 2: Monsters Unleashed Scooby-Doo 2: Monsters Unleashed is a 2004 American live-action/computer-animated family horror comedy film, based on the animated television series. It is the second installment in the "Scooby-Doo" live-action film series and a sequel to 2002's "Scooby-Doo", and was directed by Raja Gosnell, written by James Gunn and released by Warner Bros. Pictures. The film stars Freddie Prinze Jr., Sarah Michelle Gellar, Linda Cardellini, Matthew Lillard, Seth Green, Tim Blake Nelson, Peter Boyle and Alicia Silverstone, with Neil Fanning reprising his role as the voice of Scooby-Doo. Mystery Inc. (Fred, Daphne, Velma, Shaggy and Scooby-Doo) attend the