Description:  The Fonz and the Happy Days Gang is a Hanna-Barbera animated series where Fonzie, Richie, Ralph, and Fonzie's dog Mr. Cool are accidentally sent through time by a malfunctioning time machine belonging to a girl from the future named Cupcake. The group travels to different historical periods, like a haunted Transylvania in one episode, trying to find their way back to their own time.

Premise: The core plot of each episode involves Fonzie and the gang landing in a new time period, meeting a new person who needs their help, and getting into various adventures and mishaps.

Characters: The show features the voices and likenesses of the original sitcom actors, including Henry Winkler as Fonzie, Ron Howard as Richie, and Donny Most as Ralph. They are joined by Fonzie's cool dog, Mr. Cool, and Cupcake, a girl from the future with a broken time machine.