Spike Fonzarelli (played by Danny Butch) is Fonzie's fourteen-year-old cousin, who wants to be his nephew, calling him uncle. Spike looks and acts a lot like a mini-Fonzie, with the same outfit, skin colour, hairstyle, hair colour and even to some extent personality. They both have a tough-guy way of talking, but there are some differences. Spike is more feisty and hates being touched. He also doesn't mind poking people. He also likes flowers, and knows a lot about them. Spike, like Fonzie, likes romance, and has had crushes on several girls, including Joanie Cunningham-Arcola.