Wikipedia
Scrappy-Doo
Scrappy-Doo is a fictional Great Dane puppy created by Hanna-Barbera Productions in 1979, with the catchphrases, "Scrappy Dappy Doo", "Lemme at 'em!" and "Puppy Power!". He is the nephew of Hanna-Barbera cartoon star Scooby-Doo. Scrappy has appeared in a number of the various incarnations of the Scooby-Doo cartoon series. Lennie Weinrib provided his voice for one season in 1979, and from 1980 on it was performed by Don Messick (who also voiced Scooby). In the first live-action theatrical movie, video games, and commercials, he was voiced by Scott Innes.