|This scum Joker (Justice League Action) is driving Cruella insane!|
IT MUST BE REWRITTEN OR ADDED TO!!
So sayeth the great Lord of Darkness Sauron, or he will send Darth Vader to terminate you.
Help improve this article by rewriting, expanding, updating the poorly written text of the article. ✓
|Jafar says: Read my lips and come to grips with the reality!|
Joker is the secondary antagonist in Justice League Action. He is Gotham's most notorious criminal mastermind and Batman's archenemy.
He was voiced by Mark Hamill who has also voiced multiple incarnations of the Joker over the years.
Jack Napier was a lab technician who failed as a comedian. He had no choice but to turn to crime. He planned to rob a chemical plant even so fell into a chemical vat.
After becoming the Joker, he causes mayhem at Gotham City as Batman's foe.