History Main / OvernightAgeUp

* While not a ''true'' instance of this trope, it's played out exactly the same. An episode of ''Manga/ZettaiKarenChildren'' has Minamoto becoming hypnotized into seeing the three young girls he watches over as five years older -- and much more irresistible -- teens. This was to test if he really might be falling for them.

* A wish of this kind that comes true forms the premise of ''Manga/AsatteNoHoukou'' -- and [[FountainOfYouth turns a nearby adult into a kid]] as a side effect.

* Episode 18 of ''Manga/SgtFrog'' revolves around Natsumi being subject to a TransformationRay that turns her into an adult. She's even more annoyed when she finds it's part of a scheme on Keroro's part to enter her in a [[FanService beauty pageant]][=/=][[BokeAndTsukkomiRoutine manzai]] contest and win a rare model kit.
** In the manga, it's just a straight-up beauty contest, in which Natsumi experiences a WardrobeMalfunction as she reverts back to her original age -- all in front of horny geeks.
** A later episode has the Bipolar Momoka experience this same growth, at the same beach, but there is no contest for her to partake in. Instead, it's some sort of Iron Man competition.
** Another manga-only story has Natsumi being hit with the same ray at a ski resort, being hit on by the same creeps from the beach, and another wardrobe malfunction, courtesy of explosives.

* In ''Manga/MahouSenseiNegima'', in a large ShoutOut to ''Manga/MarvelousMelmo'', Negi's NonHumanSidekick Chamo produces a jar of candies that alter one's age (specifically, the red ones for older, blue ones [[FountainOfYouth for younger]]). Of course, when he uses them, several of his students notice that [[SheIsAllGrownUp He is All Grown Up]] without actually recognizing him.
** Apparently they're based on a spell [[ReallySevenHundredYearsOld Evangeline]] invented to make up for her body's age. Once the gang gets more friendly with her, she provides them apparently for free (the knock-offs are expensive).
* As partially mentioned above, the entire premise of ''Manga/MarvelousMelmo'' is based around age-changing pills: the titular character, a nine-year-old girl, can use some of those to age herself into a 19-year-old girl or an old lady, as well as turn into a baby.

* Lambo from ''Manga/KatekyoHitmanReborn'' does this in ''spades'' with his Ten-Year Bazooka, turning him from a five-year-old BrattyHalfPint into a suave 15-year-old {{Bishonen}}. [[spoiler:In one instance, he does it twice during a battle and turns 25 -- and is a veritable powerhouse, to boot.]] However, the transformations only last for about five minutes. I-Pin has been hit by the bazooka more than once as well, and in one notable misfire, Gokudera actually became [[FountainOfYouth younger]] after accidentally being hit. [[spoiler:One can only imagine the utter hilarity that occurred during the five minutes the adult Gokudera was where his younger self used to be.]]

** Another MLP example, ''FanFic/InnerDemons'': [[spoiler: [[BigBad Queen!]][[FaceHeelTurn Twilight Sparkle]] magically ages up the Crusaders, and also offers to give them their cutie marks, in [[MoreThanMindControl exchange for their loyalty]]. Sweetie Belle and Scootaloo take her up on it, while Apple Bloom refuses]]. This gets reversed at the end of the story, with help from the Princesses.
** Yet another MLP example -- at the climax of the [[FanFic/RainboomsAndRoyalty Dashverse]] story ''Hot Heads, Cold Hearts, and Nerves of Steel'', [[BigBad Sombra's]] attempt to steal the lifeforce of the kidnapped foals to [[PoweredByAForsakenChild empower himself]] causes them to physically age up at least ten years each, though their mental state stays the same. This gets reversed after Sombra is defeated.
* ''FanFic/AShadowOfTheTitans'': In one chapter, [[WesternAnimation/JackieChanAdventures Jade]] uses a staff based on Mad Mod's technology to drain [[WesternAnimation/TeenTitans Cyborg's]] age, making herself an adult while turning Cyborg [[FountainOfYouth back into a child]]. Uniquely, ''she's'' the one who reverses the process, as she's sick of the PowerIncontinence that came with the change.

* ''WesternAnimation/Jumanji'': Happens to Judy and Peter Shepherd in the episode "An Old Story".

The reverse of FountainOfYouth, this is a scenario where AppliedPhlebotinum (frequently in the form of a [[MakeAWish wish]]) turns one or more children into adults. HilarityEnsues, and the kids either fumble around awkwardly in their post-pubescent bodies, or learn AnAesop about adult responsibilities and/or not being in too big a hurry to grow up.

** In the MadeForTVMovie ''WesternAnimatio/ChannelChasers'', Timmy does it to himself on an year by year basis using a magical remote in order to find the hard limit to having Fairy God Parents to remove the magic from another magical remote Vicki took from him. Wanda does it again to restore Timmy to his normal age after Cosmo ends up [[FountainOfYouth turning him into a baby]].

Can also include a young adult character or one in early middle age becoming elderly.

Not to be confused with PlotRelevantAgeUp or SoapOperaRapidAgingSyndrome. Sometimes combined with OlderAlterEgo or SheIsAllGrownUp. See also RapidAging and OlderAlterEgo

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[[caption-width-right:350:[-Kids these days. Always in such a hurry to grow up.-] ]]

Not to be confused with PlotRelevantAgeUp or SoapOperaRapidAgingSyndrome. Sometimes combined with OlderAlterEgo or SheIsAllGrownUp.

* In ''WesternAnimation/TheFairlyOdParents'' episode "The Big Problem!", Timmy wishes he were grown up, then almost loses his godparents, who can only grant wishes to children.

* In ''WesternAnimation/TheFairlyOddparents'' episode "The Big Problem!", Timmy wishes he were grown up, then almost loses his godparents, who can only grant wishes to children.

** ''VideoGame/TheLegendOfZeldaMajorasMask'' lets Link turn Cucco chicks into grown roosters in an instant using the Bremen Mask. This is significant because their owner, Grog, felt that not seeing the Cuccos grow up was the only true regret he had in the face of Termina's imminent destruction.

* A variation on ''Series/{{Manifest}}'' as a plane takes off in 2013 for a simple three hour flight. When it lands, the passengers are rocked to discover it's now 2018. Thus, from their perspective, all the people they meet are now instantly five years older while they stay the same. The biggest example is 10-year old Cal coming face to face with his twin sister Olive, who's now a grown teenager.

* This [[http://garciarael.deviantart.com/favourites/43686822/Age-Progression-Sequences entire]] Website/DeviantART collection is full of sequences with this trope in effect.

* ''WesternAnimation/RockosModernLife''. Rocko, Heifer, and Heifer's Grandfather are on a cruise filled with senior citizens when they cross TheBermudaTriangle, which alters their ages. Giving us a mix of FountainOfYouth and this trope, all the elderly revert back to young(er) adulthood, the ship's crew become babies, and Rocko and Heifer become elderly.

* In ''Manga/RosarioToVampire'' the TokenMiniMoe wishes she had the MostCommonSuperpower the others in the UnwantedHarem has, so she comes up with this magical spell and is aged into a teenager and becomes a HotWitch whom all of the boys drool over, complete with a large bust (though her boobs are still not as big as Kurumu's).

* ''Series/{{Merlin}}'' used a spell to turn himself into a white-bearded elderly version of himself a few times--and it wasn't just a glamour, as he became noticeably more crotchety and complained about old-person maladies while under the spell. [[spoiler: The last scene of the series finale reveals that he eventually got there the hard way.]]

* Used also by Numbuh Two in ''WesternAnimation/KidsNextDoor'', who has a crush with Numbuh Five's big (evil) sister and repeatedly ages himself so he can get close to her.