For trivia specifically pertaining to ''Crybaby'', [[Trivia/DevilmanCrybaby go here]].
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* ActingForTwo: The Italian dub of the 1972 anime had only three voice actors (Massimo Corizza, Renato Montanari and Creator/BeatriceMargiotti) voicing all the characters.
* AllThereInTheScript: There are approximately 300 demons in the entirety of the Devilman Franchise, 250 of them have names, most of which are given in concept art and artistic renderings.
* CrossdressingVoices:
** Psycho Jenny is voiced by Creator/YujiMitsuya in CB Chara Go Nagai World, and by Creator/YasuhiroTakato in ''Crybaby''.
** Satan ([[spoiler:Ryo Asuka]]) is voiced by Creator/TomokazuSeki in the Amon OVA and by Creator/AyumuMurase in Crybaby, though this is a zigzagged example, since Satan is a hermaphrodite.
** Also Ryo Asuka is voiced by Creator/YumiKakazu in the obscure Mahjong computer game.
* ExecutiveMeddling: The whole series is a positive example. [[Creator/ToeiCompany Toei]] approached Creator/GoNagai about adapting his horror manga ''Manga/DemonLordDante'' into an anime, but wanted a more human-looking main character. Thus ''Devilman'' was born.
* FakeAmerican: Nearly all the voice actors in the English dub of ''Devilman: The Birth'' and ''Devilman: The Demon Bird'' are all, in fact, British people putting on American accents, with Akira and Ryo's dub actors being the very few non-British involved in the dub.
* FountainOfExpies:
** The premise of the manga, that of a loser protagonist in a world inhabited by monsters, who finds himself turned into some unusual kind of hybrid and uses this condition to fight the rest of monsters, often in partnership with some kind of association related to the topic, is still consistently homaged half a century after the manga's release. Works like ''Urotsukidoji'', ''Nightmare Campus'', ''Manga/{{Parasyte}}'', ''Manga/TokyoGhoul'', ''Manga/JujutsuKaisen'' and ''Manga/ChainsawMan'' all use some variation of it.
** The device of two main characters, one being black-haired and naive and the other white-haired and wiser, ultimately enemy to each other but at the same time intimate in a homoerotic way, was also faithfully reflected by major titles like ''Anime/NeonGenesisEvangelion'' and ''Manga/{{Berserk}}'', which eventually became a FountainOfExpies itself each.
* LateExportForYou: For several decades, the original manga series had no complete release in English outside of a bilingual Japanese/Engish edition from Kodansha exclusive to Japan. [[https://www.animenewsnetwork.com/jason-thompson-house-of-1000-manga/devilman/2010-06-03 Other attempts at an English release]], such as a localization of Shin Devilman from [[Music/TheMisfits Glenn]] Music/{{Danzig}}’s Verotik comic book company and an '''extremely''' rare translation of the first volume from Go Nagai’s own Dynamic Productions, were aborted partway through. This would change in 2018, when Creator/SevenSeasEntertainment finally released the complete manga series in English to capitalize on ''Anime/DevilmanCrybaby''’s release.
** U.S. fans of the '70s TV anime had to make do with [[BlindIdiotTranslation poorly done fansubs]] until the series finally got a DVD release from Discotek Media in 2014.
** Latin American fans had wait until the ''Manga/Cyborg009 vs Devilman'' [=OVAs=] to see anything animated about Devilman, and also they had to wait until ''Anime/DevilmanCrybaby'' to hear the same thing dubbed in Spanish. Likewise, the 1987's ''The Birth'' [=OVAs=] were released in the same region... in ''2022''. The manga itself finally got a Latin American Spanish translation at 2023.
* MagnumOpusDissonance: Reportedly, Nagai was quite surprised that ''Mazinger Z'', whose anime was running at the same time as ''Devilman'', became way more popular, because he only created ''Mazinger'' to blow off steam and wasn't taking it super seriously, while ''Devilman'' was an ambitious story that he worked very hard on. This ended up being a {{Downplayed}} example, however, since the ''Devilman'' anime still did very well in the ratings throughout its run, and the manga would go on to become highly influential in its own right and today is considered one of Nagai's best works.
* TheOtherDarrin:
** Creator/RihokoYoshida played Miki in the pilot film for the 1972 anime. Sumie Sakai, an actress primarily known for live-action work, won the role for the series, however.
** In the Latin American Spanish dub of ''The Birth'' [=OVAs=], as a result of being both a different continuity and also being streamed by a different company, the whole cast is different from the dub of ''Anime/DevilmanCrybaby''.
* PopCultureUrbanLegends: There was once a misconception that Creator/KatsuhiroOtomo wrote a chapter for the Neo Devilman anthology manga.
* WhatCouldHaveBeen:
** Go Nagai revealed he didn't have a particular plan on what to do with Ryo [[WritingByTheSeatofYourPants when making the manga]], so much that he didn't even remembered him until later in the series. He originally intended to have Ryo [[spoiler:dying at Akira's hands while Akira survived before changing and expanding his role into the BigBad as {{Satan}}]].
** Similarly, the producers of the 1972 anime were interested in introducing Ryo Asuka at some point, but they never found the chance to work him into the series's plot before it ended. Considering how different the anime was in terms history and characters, one cannot help but wonder how would they have used Ryo, in many ways the ''most'' important character of the manga, in this new setting.
*** Ryo was also going to have [[AdaptationDyeJob brown hair]] (Albeit, lighter than Akira's dark brown hair).
** As explained in Gekiman, Go Nagai went through a number of different ideas when designing Sirene: since Toei wanted a her to be a bird demon, he started by putting a pair of wings on her back, but then decided that just made her look like an angel, so he tried spicing it up by giving her talons and a bird head, but felt that that a demon with the name "Sirene" should be beautiful, so he started moving the wings around (including one where they replaced her legs) until placing them on her head. And the rest is history.
** The demon who would become known as God in the anime was originally planned to be the fourth demon general after Lacock, but the cancellation of the series lead to him being made into the final MonsterOfTheWeek.
** The manga was originally supposed to end with the Angels coming down to earth and [[spoiler: Satan willingly turning himself over to answer for his crimes]]. However, due to time constraints, it ended right after [[spoiler: Satan mourned the loss of Akira]]. Go Nagai considered this a good move in hindsight because it kept the final ending open.
** According to the Gekiman! manga, the mob who [[spoiler:killed Miki]] were also going to gang-rape her. That was until one of Go Nagai's editors talked him out of it, saying that it would make her fate much darker than it already was.
** Umanosuke Iida, director and writer of ''The Birth'' and ''Demon Bird'' had hoped to release a third OVA based off the final arc but budget constraints prevented his version from coming to fruition. His version instead became an audio drama (similar to what happened to ''[[Manga/CuteyHoney Shin Cutey Honey's]]'' final episode) while the eventual ''Amon'' OVA that did adapt that arc was made without any involvement from him.
* The original manga ends up being included in ''VideoGame/SuperRobotWars'' debuting in ''[[VideoGame/SuperRobotWarsDD DD]]'', [[UnexpectedCharacter which is a surprise to many]] because you would expect Devilman to appear in a Shonen crossover ([[VideoGame/SundayVSMagazineShuuketsuChoujouDaikessen he did once]]), not a giant robot crossover. Then again, considering how influential Creator/GoNagai and [[Anime/MazingerZ his main mecha show that has been a stalwart to the series]] are, Devilman gets a special pass[[labelnote:Although]]Series producer Takanobu Terada has stated that he wanted Devilman into the series early, but was afraid that it'll incur backlash, considering that Devilman's nature is not about HumongousMecha. Then came ''VideoGame/SuperRobotWarsXOmega'' where several non-mecha made the cut and this caused the inclusion policy to be more loosened up, and that was how Devilman made the cut.[[/labelnote]]. Amongst many voice actors that voiced Devilman in the past, Creator/ShowHayami is the one providing his voice there.
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