Batman Bios-Joker
- Name: Jack Napier
- Nicknames: The Joker, Mistah J, Puddin
- Hair Color: Green/gray
- Eye Color: Green
- Age: 87
- Height: 5'8
- Weight: 116 lbs
- Favorite Color: Purple
- Favorite Show: Gotham News, he usually stars!
- Favorite Food: Fish
- Described as a heartless maniac, the Joker only has a softspot for his Pumpkin Pie, Harley Quinn. He is a grinning maniac who will stop at nothing to kill/torment Batman!
- Quote:
- Themesong: You Drive Me Crazy by Britney Spears