the Joker no relation Batman
Superman/Batman: Generations
Dick Grayson is first seen going off to college in a scene set in 1949, after working with Batman for almost ten years, going on to become a lawyer in New York. At some point between 1959 and 1969, Dick takes on the mantle of Batman with Bruce Wayne Jr. as Robin after Bruce is forced to retire due to old age. Dick is killed by the Joker's latest scheme in 1969, with Bruce Jr. taking Dick's costume so the legacy of Batman can live on, claiming that the Joker 'merely' killed Robin. In Superman/Batman: Generations 2, Dick's ghost begins haunting the Joker in 1975. With the help of Deadman, Doctor Occult, and the ghost of Alfred Pennyworth, Dick and Alfred go into the light, Alfred convincing Dick that tormenting the Joker can serve no purpose but to risk Dick's soul, now that the Joker is so close to dying of natural causes.
no relation