The bad spin-off by which all subsequent bad spin-offs are measured. In this Happy Days stepchild, Chachi (Scott Baio), the Fonz’s younger cousin, moves to Chicago with Joanie (Erin Moran), Richie Cunningham’s younger sister, to start a band. They sang a lot, Joanie and Chachi. Not always very well, as is clear in this clip. There were stereotypically named characters — Mario, Rico, Bingo — and stereotypically cheesy songs. The main characters soon returned to Happy Days. After the show was canceled, that is.