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 1994). In 1993, "A Pup Named Scooby-Doo", having just recently ended its network run on ABC, began reruns on the Cartoon Network. With Turner Broadcasting purchasing Hanna-Barbera in 1991, in 1994 the "Scooby-Doo" franchise became exclusive to the Turner networks: Cartoon Network, TBS Superstation, and TNT. Canadian network Teletoon began airing "Scooby-Doo, Where Are You!" in 1997, with the other "Scooby" series soon following. When TBS and TNT ended their broadcasts of H-B cartoons in 1998, "Scooby-Doo" became the exclusive property of both Cartoon Network and sister station Boomerang. With "Scooby-Doo's" restored popularity in reruns on Cartoon Network, Warner Bros.