History NightmareFuel / Doraemon

** In ''Doraemon: Nobita's Diary on the Creation of the World'', the insect empire would launch a total war against the human during the [[TheRoaringTwenties The Roaring 20's]]. Thankfully, the gang manages to prevent it.

*** In the manga version of the movie, the devils are even scarier, as the female character who debuts in this movie lost her mother when she became sick and her mother [[DealWithTheDevil used magic to summon a demon and give her body to him in exchange for her health]]. Said demon turns out to be the BigBad, and his Medusa minion is actually the girl's mother. [[TearJerker They don't discover this until she dies while pulling out the sword that will unseal the demon.]] However, before she dies, she also uses her alchemical powers to turn their last wooden dart to silver, the BigBad's one weakness.

* In one episode of the 2005 anime, Nobita is sent to bed early, so Doraemon gives him a gadget that will let him choose a dream. The problem is, his short attention span leads him to keep changing the cartridges mid-dream, and in one of them, after he can't wake himself up, he finds a floating Doraemon with a [[MoodDissonance dissonant smile]] and [[UncannyValley blank eyes]]. He asks him for help, and he responds, with an ElectronicSpeechImpediment at that, at least in the dub, something to the effect of; "The ''pla''yer is ''bro''ken, Nob''y''. ''You'' br''ok''e it. And n''o''w you're stuck in this ''dream'' for''ever and'' '''e'''ver, No''by''." After that, things just keep going downhill, with Nobita jumping through all of the dreams he switched between, all with little details being just off enough to be unsettling, until he breaks down crying in an endless void. [[spoiler: It turned out that he wasn't actually waking up and changing dreams. It was a SecretTestOfCharacter from the first dream he chose -- an educational dream that was trying to [[ToughLove teach him a lesson]] in following a goal from start to finish.]]

* If you've ever been a bullying victim, Gian can come across as this. Made even worse by the fact that he's not as much picking on Nobita and other kids [[KidsAreCruel for fun like most bullies are portrayed in media,]] he's usually acting out of [[UnstoppableRage blind rage]] when something pisses him off, [[HairTriggerTemper no matter how big or small a deal.]] TruthInTelevision on how some bullies operate, along with the eternal worry you have of setting said bully off.

*** In the manga version of the movie, the devils are even scarier, as the female character who debuts in this movie lost her mother when she became sick and her mother [[DealWithTheDevil used magic to summon a demon and give her body to him in exchange for her health.]] [[spoiler: Said demon turns out to be the BigBad, and his Medusa minion is actually the girl's mother. [[TearJerker They don't discover this until she dies while pulling out the sword that will unseal the demon.]] However, before she dies, she also uses her alchemical powers to turn their last wooden dart to silver, the BigBad's one weakness.]]

* Knock-Down Hitman, something you'd never expect to exist in a children's show. It is a mini sized robot useful to [[NoHoldsBarredBeatdown beat up a target]] [[RuleOfThree three times]] at 10 yen cost "contract". This robot is relentless, practically invincible and will beat up anyone who tries to interfere with its "contract". The only way to stop Knock-Down Hitman's rampage is by paying it 100 yen as cancellation fee.

* In the "Romance in the Snowy Mountain" portion of ''Anime/StandByMeDoraemon'', Shizuka's condition is progressively getting worse while Nobita tries to carry her to the Anywhere Door. However, not only had the blizzard completely buried it from view, Doraemon went into a drowsy nap and can't hear Nobita calling for help. He also trips, losing his glasses and twisting his ankle, then Shizuka's medical scanner declares her in critical condition and urges that she should be taken to a medical facility. However, thanks to Nobita pulling a StableTimeLoop gambit, the future Nobita finds and rescues them, with Shizuka put on a breathing apparatus and she thankfully makes a full recovery later. This also implies that hadn't Nobita decided to look into the future and pull off his near-disastrous attempt to temporarily take the place of his future self, Shizuka likely would've died alone in the blizzard.

* In one chapter there is a medication that can give sweet dreams as a trade off for bad luck, and conversely, nightmares as a trade off for good luck. Nobita, thinking his day is just as bad as usual, downs more of it, until he's unexpectedly having a good day (from having a bonus pocket money to even kicking Gian saves Gian somehow and Nobita be thanked for it!). The last panel shows Nobita screaming and apparently having a seizure at the night.

* Knock-Down Hitman, something you'd never expect to exist in a children's show. It is a mini sized robot useful to [[NoHoldsBarredBeatdown beat up a target]] [[RuleOfThree three times]] at 10 yen cost "contract". This robot is relentless, practically invincible and will beat up anyone who tries to interfere with its "contract". The only way to stop Knock-Down Hitman's rampage is by paying it 100 yen as cancellation fee.

* The manga pulls no punch when it comes to Imperial Japan. Through many time travel episodes, we can see a dictatorial regime that forces children to do hard labor, euthanizes zoo animals with poison, and flat out threatens to execute a man for even suggesting surrender to the Allies.

* In one of the older episodes, Doraemon and Nobita go to WWII and in order to help a jew family the cosmic robot is forced to use some pills to pass [[https://www.youtube.com/watch?v=Ikx33ATv9O8 as Hitler]], yup, literally.

* The episode where Doraemon tries to hunt down a mouse that's loose in the house. Doraemon goes ''nuts'' trying to get the mouse, where his search in the attic (with a ''machine gun'') is treated as if he were in a horror film. After he failed to hit the mouse with his gun, he decides the only way he can get it is to ''[[ThereIsNoKillLikeOverkill nuke the house]]''. Nobita and his mom, realizing that Doraemon is serious about this, lie to him that the mouse escaped, finally calming him down.

* There are a lot of them in the movies. The villains there [[DarkerAndEdgier are ''villains'' in every sense]], and bring actual threats to the table.

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/werewolf_doraemon___cd_by_goldcrockpot23_d3coa80.png]]

* In one story he wins as he snatches a mind-reading helmet, and only Doraemon is apparently able to return it... by Doraemon controlling Nobita like a puppet.

* The episode where Doraemon tries to hunt down a mouse that's loose in the house. Doraemon goes ''nuts'' trying to get the mouse, where his search in the attic (with a ''machine gun'') is treated as if he were in a horror film. After he failed to hit the mouse with his gun, he decides the only way he can get it is to ''[[ThereIsNoKillLikeOverkill nuke the house]]''. Both Nobita and his mom are visibly freaked out by Doraemon's [[SlasherSmile slasher smile]].

* One episode had Doraemon trying to hunt down a mouse that's loose in the house. [[ThereIsNoKillLikeOverkill After he fails to catch the mouse with a machine gun, he decides the only way to be sure is to]] ''[[ThereIsNoKillLikeOverkill nuke the house]]''. Both Nobita and his mom are visibly creeped out by Doraemon's [[SlasherSmile slasher smile]].

* One episode had Doraemon trying to hunt down a mouse that's loose in the house. [[ThereIsNoKillLikeOverkill After he fails to catch the mouse with a machine gun, he decides the only way to be sure is to ''nuke the house'']]. Both Nobita and his mom are visibly creeped out by Doraemon's [[SlasherSmile slasher smile]].

* In general, the existence of Doraemon's gadgets themselves. They can do many things, from the innocuous ones as high-tech organizer, but they also have tools that can [[MindManipulation rewrite someone else's memory]], [[TimeStandsStill stop time]], [[TeleportersAndTransporters allow you to go anywhere in known galaxy]], [[ArtificialHuman create artificial humans with incredibly powerful psychic powers]] down to [[RealityWarper outright warping reality.]] The only known thing the tools are unable to do is raise the dead, [[ZombieApocalypse and that's perhaps for the better]], but the sheer amount of abuse one can do with these tools make one shudder what a criminally-inclined can do. In fact, some of the movies deal with these time criminals, the most prominent perhaps Gigazombie from ''Birth of Japan'', who intended to rewrite history and then disrupt the spacetime continuum so that no one else can access the timeline and undo his damages. Thankfully, the TimePolice are well-aware with the tools' capabilities and have countermeasures of their own.

* In another story there is a heckler than heckles money from kids. Nobita succeed to subdue him by a cucumber that makes anyone who hear Nobita's voice grovel... until the heckler learns to close his ears... Nobita then cry for help to a police only for the poilice to grovel.

* The page image for ChristmasInJapan.

* In one chapter, Nobita bribes Doraemon to do his homework for him by giving him dorayaki. Doraemon accepts but is overwhelmed by the amount of work and enlists five copies of him from the future, each two hours later. The work was done but, as well as being beat up by his clones for obvious reasons, he had to be dragged out of bed to do the homework five times. While this is a comedic premise, his fifth time has him go absolutely insane, in a very disturbing way. [[http://www.mangareader.net/521-57990-1/doraemon/chapter-77.html Here's the story. ]]

* There are a lot of them in the movies. The villains there are ''villains'' in every sense, and bring actual threats to the table.
** The "Magic World" movie has the fuel by the truckloads. The devils are real (albeit as aliens, not in religious sense) and their home planet is nightmarish. The BigBad is an alien ''{{Satan}}'', and the kids defeat him by piercing his heart... [[BodyHorror which is detached from his (apparent) body]]...

* The page image for ChristmasInJapan.

* Nobita himself can come off as a bit scary when he gets carried away with Doraemon's gadgets. When this happens, he's either seeking revenge for being bullied ( which actually has been known to have disastrous consequences in real life), or out of pure recklessness. Either way, this is never a good sign when handling these gadgets, some of which manipulate fate or time, among other uses.
* Meta example: [[ScaryTeeth these plushies,]] [[http://www.neatorama.com/2012/04/21/the-cute-yet-creepy-dental-doraemon-plush/ meant to teach youngsters about dental hygiene.]]