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
The Scooby-Doo Show other half of the hour was filled by "Dynomutt, Dog Wonder", a new Hanna-Barbera cartoon about a superhero named Blue Falcon and his goofy mechanical canine sidekick, Dynomutt. The Mystery, Inc. gang made guest appearances in three of the "Dynomutt, Dog Wonder" segments. The show was renamed to "The Scooby-Doo / Dynomutt Show" when ABC added a rerun of "Scooby-Doo, Where Are You!" to the show in November 1976. In 1977, ABC had a programming block called "Scooby's All-Star Laff-A-Lympics". The "Scooby-Doo" segment of this two-hour block included 8 new episodes of "Scooby-Doo" (two of which featured Scooby-Dum and one