Mad Hatter

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Real Identity: Jervis Tetch
Appearances (Comics): State of the Martial Art (Comic only)
Appearances (Novels): Harley Quinn at Super Hero High
Powers/Skills: Mind Control and Engineering
Voiced By: Not Applicable

Mad Hatter was the villain featured in Katana's comic book project for Ms. Moone's art class. He stole Crazy Quilt's spring collection from The Trendies, Metropolis' biggest fashion award show. Supergirl, Batgirl, and Beast Boy gave chase but Hatter threw out his razor blade hat and stopped them in their tracks by ruining their hair cuts. As part of his evil plan, they would be forced to buy hats from him. Katana arrived and sliced his hat in half then laid a hat pun on him. She drop kicked him. Hatter regretted trying to take her on. Katana palmed him in the chest. She threw out hats to Supergirl, Batgirl, and Beast Boy then went off to return the collection to Quilt. Supergirl didn't think Hatter's hat would work on her hair and asked Katana to change that part in the comic. Harley Quinn speculated it could have been a Kryptonite blade.

(Novels only) Mad Hatter wears a hat outfitted with high-tech gizmos and gadgets that enhance his mind control powers. With incredible mental discipline, he can control many people at once. He supposedly bought Krazy Karnival, the world's greatest and grandest amusement park, from its previous owner of 50 years who had decided to "retire." He started rapid expansion under the decree of putting a "new twist on an old favorite." New rides and hip and healthy foods were added. Tetch hired thugs and villains like Silver Swan, Cupid, and Mirror Master and insisted they wear his "Krazy" Hats. They fell under the sway of his mind control gadgets. In reality, the carnival was a lure for Harley Quinn. A fan of Harley's Quintessentials, Hatter wanted her audience of followers to get him started on a road to fame and fortune. He would mind control the masses as they tuned in. After Lion-Mane's heist at the Metropolis Museum of Art was foiled, fliers for Krazy Karnival were distributed in bubbles the size of baseballs and advertised it would be in Metropolis for only 24 hours.

Harley Quinn got an idea to hold her Battle of Bands rematch at the carnival without permission. A giant bubble machine arose from the center of the carnival on the day of. It looked like a colossal jukebox with a rainbow of bubbles shooting out as music played. Carnival workers handed out Raspberry Sugar Bombs, Cotton Candy Clouds, free light-up necklaces, and "Krazy" Hats. Miss Martian fought a sudden headache but wanted to stay. Lois Lane and Harley found Hatter and interviewed him. He claimed his goal was to bring happiness to the world. Near the Magic Donut Maker, which shot free mini-donuts out, Miss Martian's "Krazy" Hat wilted. Once it was taken off, Miss Martian instantly felt better. The High-Tech Bubble Machine broke the world record for the biggest balloon but it was a ruse to encase the entire carnival in an impenetrable barrier. Workers like Silver Swan and Cupid abandoned their posts.

Hatter had the mind-controlled Green Team pillage Metropolis with holographic clones created by Mirror Master's technology and sent out fake Harley's Quintessentials that claimed the supers didn't care about saving Metropolis. Miss Martian realized the "Krazy" Hats were affecting everyone's minds. Batgirl and Flash subdued Mirror Master and reprogrammed his equalizer weapon while Harley went into the Amazing Maze alone. Mad Hatter sat on a red velvet throne in the middle of the maze drinking tea. He revealed the carnival was all for Harley in a way and detailed his plans. Hatter offered her the chance to work with him, even though he believed he had Mirror Master's Fake Harley hologram to do his bidding. Harley secretly broadcasted Mad Hatter's speech to the world through her QuinnCam then destroyed it to prevent him from using it. She pursued him through the carnival grounds to the Ferris Wheel. As Hatter clung to a cart, he begged for mercy.

Harley demanded to know how to break the bubble barrier. Hatter stated she just had to get obstreperous to break it. Harley pulled him up but he pushed her off the cart. Harley's gymnast skills saved her. He ran to Lost and Found to free his workers and take over their minds again. Harley threw her body into the maddest tumble and landed on his shoulders. Hatter's hi-tech hat went flying. She smashed it with her mallet and all the rides went dark. Harley got an idea and started up her The Battle of the Bands rematch with everyone present. The noise from the music and the strength tester bell shattered the barrier. Harley made Hero of the Month. The Green Team took over Krazy Karnival and announced they would donate profits to charity.