History Main / OvernightAgeUp

* Of course, we also have to mention CaptainMarvel ([[IAmNotShazam NOT Shazam]]), a boy who transforms into an adult superhero. This actually causes a problem when he gets involved with a superheroine his own age, and they have to break up because their teammates, who don't know Marvel's civilian identity, would take it the wrong way.

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

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

* [[http://visibletime.ararchive.com/index.htm Visible Time]] is an archive featuring links and pictures to intances of this trope, FountainOfYouth, and many other AgingTropes.

* "Brief Candle," from season one of ''Series/{{Stargate SG-1}}'', finds Jack O'Neill infected by Goa'uld nanites which send him flying into old age.

* AdamSandler's ''Click'' uses a ratcheting variation, to familiar [[{{Aesop}} Aesopic]] ends.

* In ''Literature/HowlsMovingCastle'' by DianaWynneJones, Sophie is cursed by a witch and turned into an old woman.

* Episode 18 of ''KeroroGunsou'' 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 one episode of ''SailorMoon [=SuperS=]'', [=PallaPalla=] switches Sailor Moon and Sailor Chibi Moon's ages around as a joke. A similar plot is present in the original manga.

* "Brief Candle," from season one of ''{{Stargate SG-1}}'', finds Jack O'Neill infected by Goa'uld nanites which send him flying into old age.

* In ''PowerRangersDinoThunder'', Cassidy, Devin, and other citizens of Reefside (as well as a pop star) were turned elderly by an youth stealing vacuum monster.

** In ''PowerRangersZeo,'' Billy got turned into an old man for two episodes (his last; old Billy is TheNthDoctor being used to cover for the actor saying ScrewThisImOuttaHere to behind-the-scenes {{Jerkass}}itude.)

* Played straight in the video game series TheSims. The characters "poof" from one age group to another once the requisite time has passed. In the first game this only applies to babies becoming children - children never become adults and adults never grow old - but from the second onwards it affects everyone.

* Three episodes of ''DextersLaboratory'' deal with the mental mechanics. In one, he wishes to stay up late to watch scary movies, so makes himself older. But he overshoots, becomes elderly, and is unable to stay awake to watch. In the second, he is too small in size to ride amusement park attractions, and ends up giving himself a case of [[AttackOfThe50FootWhatever size change]] instead. And in the third, he becomes a teenager... but instead of becoming a handsome lad, he becomes an absolute {{Nerd}} with pimples and crooked teeth.

* In ''SpongebobSquarepants'', Plankton once developed an instantaneous aging ray.

* In ''TheThiefLord'', there is a magical merry-go-round that can act as either a FountainOfYouth for those who ride it, or provide this effect, depending on what animals you ride. At the end of the book, one character chooses to age himself from a young teenager to a young adult - and is stuck that way.

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.

* The anime series ''HimechanNoRibon'' (''Hime-chan's Ribbon'') is largely based on this, as Himeko frequently uses the magic ribbon to appear as an adult.

* Vivio turns into an adult in ''ANime/MagicalGirlLyricalNanohaStrikerS'' [[spoiler: when the Cradle's defense system forces her to battle Nanoha. She returns to her original age once the [[AppliedPhlebotinum Relic]] inside her is destroyed.]]

* Lambo from ''Manga/{{Katekyo Hitman Reborn}}!'' 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 where his younger self used to be.]]
* In ''Manga/AhMyGoddess'', Skuld gets to be an adult for a day due to PhlebotinumBreakdown. Her older sister, Urd, goes [[{{FountainOfYouth}} the other way]]. Despite being desperate to return to their original forms, they find ways to make the best of it.

* In ''{{Detective Conan}}'' OVA: The Stranger in 10 Years, Haibara finished an antidote drug to make Conan/Shinichi 17 again but he was sick that time. Once he took the drug, he didn't turn back into a 17 year old Shinichi, [[spoiler: he's a 17 year old Conan Edogawa warped 10 years in the future. Thankfully, it ends up being a dream.]]

** That may have been the origin of Major Might's very brief affair with Amazonia in ''LoveAndCapes''.

* First used in the ''Franchise/StarTrek'' universe in the [[Series/StarTrekTheOriginalSeries original series]] episode "The Deadly Years" (Ep. 2.12) in which the ''Enterprise'' crew discover a planet where the colonists are afflicted with a rapid aging syndrome, and are affected by it themselves. ''Series/StarTrekTheNextGeneration'' does the "adults becoming elderly" version a few times:
** In the season two episode "Unnatural Selection", the ''Enterprise'' receives a distress call from the USS Lantree, where they find everyone dead from rapid aging, and must find the cause before scientists on a research colony suffer the same fate.

* In [[http://browse.deviantart.com/?qh=§ion=&q=age+regression#/d4p253a this]] {{deviantART}} animation, a girl ages up, presumably by trading ages with the guy opposite her who [[FountainOfYouth ages down]].

* ''TheLegendOfZeldaOcarinaOfTime'' to an extent. Link goes to sleep for seven years, aging gradually, but it's instantaneous to him and the player.

* ''[[RockosModernLife Rocko's Modern Life]]''. 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.

* First used in the ''StarTrek'' universe in the original series episode "The Deadly Years" (Ep. 2.12) in which the ''Enterprise'' crew discover a planet where the colonists are afflicted with a rapid aging syndrome, and are affected by it themselves. ''StarTrekTheNextGeneration'' does the "adults becoming elderly" version a few times:

** The ''[[StarTrekDeepSpaceNine DS9]]'' ep "Time's Orphan" has Molly O'Brien aging from 8 to 18 through a NegativeSpaceWedgie.

* TheDCU FifthWeekEvent ''Sins of Youth'' combined FountainOfYouth and ThirteenGoingOnThirty, with a combination of Chaos Magic and an "aging ray" turning all the teenage heroes into adults and all the adult heroes into kids.

** The ''[[StarTrekDeepSpaceNine DS9]]'' ep "Time's Orphan" has Molly O'Brien aging from 8 to 18 through a NegativeSpaceWedgie. [[IGotBetter She got better]], like her mother did when she suffered from the [[FountainOfYouth inverse]] in TNG's "Rascals".

* ''Instant Teen Just Add Nuts''; after all, there's a reason TokyoPop released the English translation under that name, and that reason is this trope being a major plot element.

* In [[http://browse.deviantart.com/?qh=§ion=&q=age+regression#/d4p253a this]] deviantART animation, a girl ages up, presumably by trading ages with the guy opposite her who [[FountainOfYouth ages down]].

* Lambo from ''{{Katekyo Hitman Reborn}}!'' 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 where his younger self used to be.]]
* In ''AhMyGoddess'', Skuld gets to be an adult for a day due to PhlebotinumBreakdown. Her older sister, Urd, goes [[{{FountainOfYouth}} the other way]]. Despite being desperate to return to their original forms, they find ways to make the best of it.

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

* In [[http://browse.deviantart.com/?qh=&section=&q=age+regression#/d4p253a this]] deviantART animation, a girl ages up, presumably by trading ages with the guy opposite her who [[FountainOfYouth ages down]].

[[folder:Web comics]]

* In ''{{Detective Conan}}'' OVA: The Stranger in 10 Years, Haibara finished an antidote drug to make Conan/Shinichi 17 again but he was sick that time. Once he took the drug, he didn't turn back into a 17 year old Shinichi, [[spoiler: he's a 17 year old Conan Edogawa warped 10 years in the future. It ends up being a dream.]]

* In a storyline in "Kevin and Kell"; Connie and Nigel use the time machine to age themselves from babies to adults so they can spend one day as adults before Nigel moves away. A funny moment is when Connie spits a whole bunch of teeth and says "Baby teeth"

* In ''Freaky Friday'', a mother and daughter [[FreakyFriday change places for a day]], giving us a FountainOfYouth and a ThirteenGoingOnThirty in the same story.

* Jake in the {{Animorphs}} book The Familiar. He wakes up as a young adult in a world where the Yeerks control the Earth. By the end of the book, he's back to being a young teen, though.

* In ''Five Children and It'' by ENesbit the older four get annoyed with how they have to chase their baby brother around all the time, so they wish him into a grownup. Unfortunately, he didn't learn all of the lessons associated with growing up, such as not being a total prat, and turns out to be even more annoying this way.
* In ''Howl's Moving Castle'' by DianaWynneJones, Sophie is cursed by a witch and turned into an old woman.

* Getting hit by a Magician's spell without armor in ''[[GhostNGoblins Ghouls 'n Ghosts]]'' turns Arthur into an old man.

* Guu from the anime ''[[JungleWaItsumoHaleNochiGuu Haré+Guu]]'' can appear as an adult when she needs to. Since she normally appears to be the same age as ten year old Haré, this counts. Sorta. It's quite possible neither age is her true form.

* In ''Five Children and It'' by [=~E. Nesbit~=] the older four get annoyed with how they have to chase their baby brother around all the time, so they wish him into a grownup. Unfortunately, he didn't learn all of the lessons associated with growing up, such as not being a total prat, and turns out to be even more annoying this way.

* ''TheLegendOfZeldaOcarinaOfTime'' to an extent, Link goes to sleep for seven years, but it's instantaneous to him and the player.
** Though to be fair, Link is basically just in suspended animation, so he really does age gradually, he just can't perceive it.