Warning! This article contains spoilers for Batman: Beyond The White Knight #2
The Joker has been well-established as Batman’s arch enemy throughout his DC Comics career, but he has recently undergone some massive character development as Batman Beyond has turned the Joker into Bruce Wayne’s greatest ally.
The White Knight series of Batman titles has changed the Joker more than almost any other alternate universe. The series depicts a Joker who has been cured of his madness and becomes a force for good named Jack Napier. Unfortunately, though Jack and Harley Quinn get married, the Jack persona wasn't destined to last forever, and he eventually reverted back into his Joker persona. Though he had died, the Joker isn't exactly a villain that lets heroes forget about him.
Related: Joker's Darkest Joke Against Harley Quinn is Too Horrific for the DCEU
In Batman: Beyond The White Knight #2 by Sean Murphy with Dave Stewart, Bruce Wayne learns that, a few years ago during a fight with the Joker, the Clown Prince of Crime shot a microchip into Batman’s brain, one that contained a copy of his consciousness. Before the events of this series, the Joker was killed by Harley Quinn so Batman believed that he was long dead, making his reintroduction that much more shocking. Even after his death, the Joker will now always be with Batman as he is literally lodged inside of Bruce’s mind. Instead of tormenting Batman, the Joker decided to help him any way he can, and while initially shocking, he ends up being a major asset.
The Joker now exists as an algorithm within a high-tech microchip in Bruce Wayne’s head that is wirelessly connected to the Gotham Terrorist Oppression Unit’s mainframe, the private military operation that has
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