in Batman: Under the Red Hood John DiMaggio was what fictional supervillain created by Bill Finger
Joker (character) The Joker is a fictional supervillain created by Bill Finger, Bob Kane, and Jerry Robinson who first appeared in the debut issue of the comic book "Batman" (April 25, 1940), published by DC Comics. Credit for the Joker's creation is disputed; Kane and Robinson claimed responsibility for the Joker's design, while acknowledging Finger's writing contribution. Although the Joker was planned to be killed off during his initial appearance, he was spared by editorial intervention, allowing the character to endure as the archenemy of the superhero Batman.
Shining Knight Shining Knight is the name of three fictional superheroes appearing in American comic books published by DC Comics. The original Shining Knight, Sir Justin, was created by Creig Flessel and first appeared in "Adventure Comics" #66 (September 1941).