<Li> Gloria (Linda Purl) (season 2; 5 episodes)--Richie's occasional girlfriend in season two . </Li> <Li> Dr. Mickey Malph (Alan Oppenheimer, Jack Dodson) (season 3 & 4, 7; 4 episodes)--Ralph's father, an optometrist and, like his son, a self - styled comedian . Briefly separated from his wife Minnie, but apparently resolved issues with her after a talk with Ralph . It was Dr. Malph who convinced Fonzie to wear glasses after he started having vision problems . </Li> <Li> Raymond "Spike" Fonzarelli (Danny Butch) (seasons 2--4; 4 episodes)--Fonzie's cousin (often referred to as his nephew, but Fonzie explains that he couldn't be his nephew as Fonzie was an only child) and his copycat . He went on a date with Joanie in "Not with My Sister, You Don't ." Made fleeting appearances before the introduction of Chachi . The kinship between Spike and Chachi was never explained . </Li> <Li> Carol "Pinky" Tuscadero (Roz Kelly) (season 4; 3 episodes)--Former girlfriend of Fonzie and a traveling demolition derby driver . </Li>

Who played fonzie's nephew on happy days