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! Curse of the Lake Monster short trailer of the film was shown on Cartoon Network on August 1, 2010, depicting Scooby and Shaggy at the beach. The television premiere drew 5.1 million viewers. The film was released on DVD by Warner Home Video on March 1, 2011. Warner Bros. Home Entertainment distributed the film on Blu-ray Disc. Scooby-Doo! Curse of the Lake Monster Scooby-Doo! Curse of the Lake Monster (also known as Scooby-Doo 4 or Scooby-Doo 4: Curse of the Lake Monster) is a 2010 American made-for-television comedy film directed by Brian Levant for Cartoon Network and based on the Saturday morning cartoon series "Scooby-Doo"