The success of the feature film, "Bill & Ted's Excellent Adventure", led not only to the sequel, "Bill & Ted's Bogus Journey", but an animated series that aired in between films.
Orion Pictures contracted Hanna-Barbera to produce the first season of episodes, which aired on CBS, with stars Keanu Reeves, Alex Winter, Bernie Casey, & George Carlin reprising their roles from the movie. However, after "Bogus Journey", the series changed animation houses (to DIC) & networks (Fox, which was developing a live-action version of the series). Winter & Reeves were gone, replaced by Christopher Kennedy & Evan Richards, who would star in the live-action version, which would air on Sundays on Fox. Neither of these lasted very long, about 2 months apiece, and then, poof, gone-zo.
Winter went on to develop another short-lived series, The Idiot Box, for MTV, and has seemingly left show biz altogether. Reeves was last seen in the movie, "47 Ronin", a box office dud.
There is no rating for the show, since I never saw it. As a public service, we present, compliments of Dailymotion, "The Birth of Rock & Roll":