Joker Junior (DC Generations)

Joker Junior was an identity assumed by the Joker from 1965 to 1969 while he pretended to be stuck in prison. "Joker Junior" claimed to be the Joker's son, and battled Batman (Dick Grayson) and Robin (Bruce Wayne Jr.) on several occasions. In September 1969, the Joker abandoned the identity after he successfully slew Batman (although he was tricked by Bruce Wayne Jr.) into thinking otherwise).