Through his bloody quest of vengeance, the Punisher has carved a path of destruction through the Marvel Universe, and Frank Castle's grim mission has even inspired copycats across fictional worlds, even in the future of the DC Universe of Batman Beyond.

The Punisher was created by Gerry Conway, John Romita Sr. and Ross Andru and debuted in Amazing Spider-Man #129 in 1974. After he became one of comics' most prominent antiheroes, Batman Beyond introduced Mad Stan, a character who was heavily informed by Castle, in 1999. Like the Punisher, Stanley "Mad Stan" Labowski was a one-man army, only he was a non-conformist radical who attempted to wage a one-man war against the "system" in Gotham after becoming fed up with the bureaucracy and information overload present in the city.

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The similarities between Mad Stan and Frank Castle don't end with the vigilante mindset. Like the Punisher, Mad Stan makes up for his lack of superpowers with explosives and a proficiency in hand-to-hand combat.

Mad Stan first appeared in the Batman Beyond episode, "Rats," when he flies into a rampage and attacks Batman. He also appears in the episode, "Eyewitness" where he is seemingly murdered by Batman. After beating Stan in a fight, Terry McGinnis announces that he will stop Stan from breaking out of prison again, and makes good on his promise by using one of Stan's own bombs to bash his head in. However, it's later revealed that Batman was framed by the mysterious Spellbinder and that Mad Stan is alive and well inside one of Spellbinder's virtual reality parlors. Mad Stan also appeared in "Countdown," one of the show's final episodes. In this episode, Mad Stan straps an enormous bomb onto the back of the robot, Zeta, and tells Batman that he has until midnight to find Zeta and disarm the bomb.

Mad Stan was introduced into the Batman universe as a sort of underwhelming villain who was typically used as a lead-in to more complex plots. His career in Batman Beyond was relatively short-lived, but Mad Stan did not disappear completely when the show ended in 2001. Stan entered the comic book DC Universe with 2012's Batman Beyond Unlimited #3-6, by Adam Beechen and Norm Breyfogle. The story, "The Trigger Man," depicts Mad Stan's return after being allegedly killed by Hush.

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Stan becomes furious to learn that his old partners have gone on in his absence and cut him out of the business. He then goes on a vengeful rampage when his precious dog, Boom-Boom, is taken from him. In this John Wick-esque story, Batman Beyond works with Mad Stan to get his dog back and prevent any further damage as Stan becomes more and more unstable.

While Mad Stan has only sporadically been involved in the DC Universe, he is far from a simple clone of the Punisher, but the similarities between the two are undeniable. And as long as Batman Beyond has a place in the DC Multiverse, Mad Stan may very well return to make the DC Universe a more explosive place.

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