Mister Mxyzptlk (Injustice)

Batman Villain(s)
This character, team or organization, has been 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."

Constantine Villain(s)
This character, team or organization, is or was primarily an enemy of John Constantine in any of his various incarnations. This template will categorize articles that include it into the category "Constantine Villains."

This character is or was a member of the New Regime, a regime formed by Superman enforcing the law with an iron hand in the events that precede and include the Injustice: Gods Among Us video game.
This template will categorize articles that include it into the "Regime members" category.

This character has been a member of the Justice League of America, or the Justice League in any of its various incarnations, sworn by a duty to act as guardians of America and the world by using their skills and/or superpowers to protect Earth from the clutches of both interstellar and domestic threats.
This template will categorize articles that include it into the "Justice League of America members" category.