History of character is unknown.
- Telepathic Immunity: He is immune to telepathy, as seen when Martian Manhunter tried to enter his mind, but doubled over in pain with Joker replying "Scary in there, isn't it?".
- Genius Level Intellect:The Joker is also very skilled in the fields of chemistry, genetics, and nuclear engineering. He also seems capable of mastering whatever he puts his twisted mind to when he wants to.
- Joker Venom: a chemical which, when inhaled, causes its victims to laugh uncontrollably until they die with a wide grin on their faces.
- 5 Appearances of Joker (Earth-16)
- 3 Images featuring Joker (Earth-16)
- Quotations by or about Joker (Earth-16)
- Character Gallery: Joker (Earth-16)
Injustice League member