Alexander Luthor (Harley Quinn TV Series)

This character is or was primarily an enemy of Superman in any of his various incarnations, or members of the Superman Family. This template will categorize articles that include it into the "Superman Villains category."

This character is or was primarily an enemy of the Justice League, in any of its various incarnations. This template will categorize articles that include it into the category "Justice League Villains."

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.