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 Mystery theme song. Scooby-Doo Mystery Scooby-Doo Mystery is the name of two video games released by Acclaim Entertainment and Sunsoft in 1995 based on the "Scooby-Doo" animated series. One of the games was released for the Super Nintendo Entertainment System and is an adventure game with platforming elements. The other title, released for the Sega Genesis is a more traditional adventure game style interface. Both were released only in North America. In both games, players take control of Shaggy Rogers and Scooby-Doo, who help solve various mysteries with other members of Mystery Incorporated who serve minor roles during gameplay. "Scooby-Doo Mystery"