The Joker is Batman's archenemy, Harley Quinn's boyfriend and partner in crime, and the main antagonist of the two-part Halloween special Nightmare in Gotham.
Episode appearances
- Hate Triangle (mentioned)
- Gotham Con (mentioned)
- Frenemies (mentioned)
- The Warrior and the Jester
- Nightmare in Gotham
Super Shorts
- BabsGirl (mentioned)
- Sucker Punch (cameo as punching bag)
Trivia
- His outfit is almost similar to his LEGO incarnation from the film, The LEGO Batman Movie.