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430 Evil alternate universe Aquaman, Super Friends
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560 I'll allow. There are two possible Plastic Man answers, but only the Comedy Adventure Show actually made it on the air. Beyond that, everything correct; list updated.
325B: not from a TV series; not really from comics despite appearances
326: from a TV show, based on comics
328: from a movie, based on comics
329: from a movie, based on comics
335: from a TV show, based on comics
340: from a TV show, based on comics
341: from a movie, based on comics
342: from a TV show, based on comics
344: original TV character
345: from a TV show, based on a novel
346: original TV character
347: from a TV show, based on comics
348: original TV character who has since appeared in comics
349: from a TV show, based on comics; comic version non-villainous
350: from a TV show, based on comics
351: from a TV show, based on comics
353: from a TV show, based on comics
354: from a TV show, based on comics
355: original TV character later migrated to the comics
356: from a TV show, based on comics
358: from a movie, based on comics
359: from a movie, based on TV show
360: from a movie, based on comics
361: original TV character
363: original TV character
364: from a movie, based on comics
365: from a TV show, based on comics
366: from a TV show, based on comics
367: from a TV show, based on comics
368: from a movie, based on comics
369: from a TV show, based on comics
371: from a TV show, based on comics
372: from a TV show, based on comics
373: from a TV show, kind of based on comics
374: from a TV show, kind of based on comics
375: from a TV show, based on comics
376: from a TV show, based on comics
378: from a TV show, based on comics
379: from a movie, based on comics
380: from a TV show, based on comics
381: from a TV show, based on comics
382: from a TV show, based on comics
383: not from a TV show but based on comics
384: neither from a TV show nor based on comics
386: from a TV show, based on comics
387: from a TV show, based on comics
388: from a movie, based on comics
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A day since this last guesses so adding 15 more clues:
325B: not from a TV series; not really from comics despite appearances
326: from a TV show, based on comics
328: from a movie, based on comics
329: from a movie, based on comics
335: from a TV show, based on comics
340: from a TV show, based on comics
341: from a movie, based on comics
342: from a TV show, based on comics
344: original TV character
345: from a TV show, based on a novel
346: original TV character
347: from a TV show, based on comics
348: original TV character who has since appeared in comics
349: from a TV show, based on comics; comic version non-villainous
350: from a TV show, based on comics
351: from a TV show, based on comics
353: from a TV show, based on comics
354: from a TV show, based on comics
355: original TV character later migrated to the comics
356: from a TV show, based on comics
358: from a movie, based on comics
359: from a movie, based on TV show
360: from a movie, based on comics
361: original TV character
363: original TV character
364: from a movie, based on comics
365: from a TV show, based on comics
366: from a TV show, based on comics
367: from a TV show, based on comics
368: from a movie, based on comics
369: from a TV show, based on comics
371: from a TV show, based on comics
372: from a TV show, based on comics
373: from a TV show, kind of based on comics
374: from a TV show, kind of based on comics
375: from a TV show, based on comics
376: from a TV show, based on comics
378: from a TV show, based on comics
379: from a movie, based on comics
380: from a TV show, based on comics
381: from a TV show, based on comics
382: from a TV show, based on comics
383: not from a TV show but based on comics
384: neither from a TV show nor based on comics
386: from a TV show, based on comics
387: from a TV show, based on comics
388: from a movie, based on comics
390: from a TV show, based on comics
391: from a movie, based on comics
392: original TV character
393: original TV character
394: from a TV show, based on comics
395: original TV character, though a variation of this character has appeared in comics
396: from a movie, based on comics
397: original TV characters
399: original TV character, though at least one comic character with the same code exist appeared earlier
401: original TV character, but inspired by a comic character
402; from a TV show; looks like the comic version came first but just barely
403: from a TV show, based on comics
404: not from TV; somewhat based on comics
406: from a movie; based on a non-villainous comic character
407: original TV character
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342 Sinestro, Brave and Bold
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379 Two Face, Batman Ninja
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383 DC Showcase Green Arrow, Count Vertigo
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403 Manchester Black, Superman vs the Elite
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409 Two Face, Batman TAS
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443 Isis, Krypto
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456 Black Manta, Superman/Aquaman Hour
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481 Shriek, Batman Beyond
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489 Monsieur Mallah, Young Justice
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556 Silver Banshee, JLU
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574 Firefly, The Batman
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595 Silver Banshee, Superman/Batman Public Enemies
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628 Parasite, Superman TAS
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364 Jack of Spades, JL Doom
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369 Killer Frost, JL Action
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378 Queen of Clubs, Super Friends
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386 Mister Freeze, The Batman
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451 Nega Beast Boy, Teen Titans
[img] ,h_2060,strp/nega_beast_boy_by_isaacnoeliscutie_dcxgvmu-fullview.png?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOiIsImlzcyI6InVybjphcHA6Iiwib2JqIjpbW3siaGVpZ2h0IjoiPD0yMDYwIiwicGF0aCI6IlwvZlwvN2QxM2M1ZjItMjhjNS00NjhlLTlkOWItZjAwNDhjZTc5MjFiXC9kY3hndm11LTZhNTQ1OTc2LTFjNDQtNDhmNC04YTM3LWQ5MWJmNmFiNDBkYy5wbmciLCJ3aWR0aCI6Ijw9MTI4MCJ9XV0sImF1ZCI6WyJ1cm46c2VydmljZTppbWFnZS5vcGVyYXRpb25zIl19.uVOwqmuSDW347xYY9e722W6BK2QZPhfN6qKNNLHj5WI[/img]
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493 Ace of Clubs, DCAU
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503 Terra, Young Justice
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520 Cheetah, Brave and Bold
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376 Cheetah, Superman/Batman Public Enemies
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423 Brainiac, Superman Brainiac Attacks
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494 Zilius Zox, GL Animated
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484 Toyman, Young Justice
[img] ,h_1280,q_75,strp/young_justice__invasion__the_toyman_by_jerome_k_moore_d5xk9r3-fullview.jpg?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOiIsImlzcyI6InVybjphcHA6Iiwib2JqIjpbW3siaGVpZ2h0IjoiPD0xMjgwIiwicGF0aCI6IlwvZlwvMmQzNzY3NzAtYWJiZC00OTYxLWE2OGEtZmEzMWM4MjE0ZjNiXC9kNXhrOXIzLTlmNjBkZDNhLTllMDAtNDk4My1iOWEwLWM0OTdlZjA3MzU3My5qcGciLCJ3aWR0aCI6Ijw9MTI4MCJ9XV0sImF1ZCI6WyJ1cm46c2VydmljZTppbWFnZS5vcGVyYXRpb25zIl19.E8YKX-7hOQBHIwKjYke7jyDrSy6n-M_w1rlWQG0EmWM[/img]
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359 King Tut, Batman vs Two Face
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397 Bud and Lou, Krypto