 Joanie and Chachi returned to "Happy Days" when "Joanie Loves Chachi" was cancelled, and after them being broken up for a while in the final "Happy Days" episode, Joanie and Chachi marry.After his initial appearance, the character of Chachi was expanded to a recurring character due to positive reception by fans, with Baio receiving up to 5,000 fan letters a week.The name was given by Ron Howard's long term friend, Andrew Smith.