Joker (DC Super Friends Web Series)

Legion of Doom member
This character is or was a member of the Legion of Doom, a team of supervillains culled together for the purpose of conquering the world and defeating the Super Friends, in any of its various incarnations. This template will categorize articles that include it into the "Legion of Doom members" category.

Batman Villain(s)
This character, team or organization, is or was primarily an enemy of the Batman, or the Batman Family as a whole. This template will categorize articles that include it into the category "Batman Villains."