History Main / MergedReality

* In ''VisualNovel/ElevenEyes'', Kakeru comes to the realization late in the game that every one of the chosen ones was drawn from another, slightly different, reality since memories and information don't match up. Everyone worries that [[spoiler:they have to die because of Liselotte's soul in them and]] when the battle is finished, they won't be able to see each other again. [[spoiler:Kukuri heals the world back to normal.]] Everyone ends up staying together in the same world, a composite of all of theirs. They'd become such a tight group of TrueCompanions that it would be too cruel to split them apart.

* In ''VisualNovel/ElevenEyes'', Kakeru comes to the realization late in the game that every one of the chosen ones was drawn from another, slightly different, reality since memories and information don't match up. Everyone worries that [[spoiler:they have to die because of Liselotte's soul in them and]] when the battle is finished, they won't be able to see each other again. [[spoiler:Kukuri heals the world back to normal.]] Everyone ends up staying together in the same world, a composite of all of theirs. They'd become such a tight group of TrueCompanions that it would be too cruel to split them apart.
* Used mildly in the Shara/Shura [[StoryArc arc]] of ''Manga/TsubasaReservoirChronicle''. In this case, the main characters don't even realize they are time traveling, but their actions do result in friendlier interactions in the original world. Not that there aren't consequences....

* ''Anime/DualParallelTroubleAdventure'': After the BigBad is defeated, the hero Kazuki Yotsuga is forced to sacrifice his HumongousMecha in order to SaveBothWorlds -- except that Mitsuki Sanada [[WhatDoesThisButtonDo leans on the wrong lever]] just beforehand, causing all of the named characters find themselves in a Merged Reality, unlike either of the realities of the story, but preserving all of the unique memories and characters from both of its parents. (For example, both Mitsuki Sanada and her cousin-slash-{{alternate self}} Mitsuki Rara both coexist within the new reality and its new history.)

* ''VideoGame/XenobladeChronicles3'' has Aionios, a world created at the precise instant that the new worlds of ''VideoGame/XenobladeChronicles1'' and ''VideoGame/XenobladeChronicles2'' merged due to the two worlds colliding. A construct called Origin was meant to restore the worlds to their un-merged states, but was hijacked by the BigBad who has frozen time and is ensuring this merged world survives in what is referred to several times as "The Endless Now". The moment Origin is re-activated, the worlds will be allowed to de-merge and continue onward, and the game centers around activating Origin to allow that to happen. As is expected of such a merger between two old worlds, many familiar sights or regions appear, often with a new twist (for example, the Makna Forest of XC1 and abandoned city Morytha of XC2 have merged to become the Maktha Wildwood, an abandoned city overgrown by a jungle).

* ''VideoGame/TalesOf'':

* In ''Series/KamenRiderBuild'', this ends up being the heroes' ultimate plan to save the world. [[spoiler:They combine their Earth with the Earth from a parallel universe (implied being the main ''Kamen Rider'' universe) where the series' events never happened, using the BigBad as fuel to ensure he doesn't exist in the resulting world. Most of the characters end up with parallel counterparts in the new world, who don't remember anything that happened. Sento and Ryuga, however, because of how fundamentally they were altered, end up as anomalies who ''do'' remember the show's events and actually coexist with their parallel counterparts. This makes for a BittersweetEnding, though: our two heroes end up alone, with no place in a new world where versions of them who never experienced the series' events are back where they belong. However, post-series team-up stuff will have the other characters' memories restored. ...Just in time for the Zi-O series to shake things up even more, leaving the Build characters' status unclear.]]
* Build's successor ''Series/KamenRiderZiO'' had a more malicious example due to the various time paradoxes that occurred throughout the show, [[TimeCrash time is slowly breaking down.]] [[spoiler:By the final arc, reality has broken down so much that the various alternative Kamen Rider worlds have fused together which creates chaos as the various enemies of those worlds are running free without the respective Rider. This is revealed to be part of the BigBad plan and then destroy resulting fused world to save his own]].

* ''VideoGame/TalesOfSymphonia'':
** It ends up with this being the goal of the main characters, although for much of the second half of the game they are under the mistaken impression that they need to do the exact opposite in order to SaveBothWorlds. [[spoiler:It just so happens that the resulting combination ends up being the world map of ''VideoGame/TalesOfPhantasia''.]]
** It doesn't quite go as planned, as shown by the [[VideoGame/TalesofSymphoniaDawnoftheNewWorld sequel/spinoff]] that came after. [[spoiler: Only when Ratatosk (in the Good Ending) decides to rewrite the laws of nature so that life does not need mana to survive does everything ultimately work out.]]

** Averted, however, in ''VideoGame/TheLegendOfZeldaOcarinaOfTime'' - a ContinuitySnarl has led to a WordOfGod-supported explanation that the events of that game created multiple timelines that have not been known to merge again. (Some sources make it ''look'' like the timelines eventually merge into ''VideoGame/TheLegendOfZeldaBreathOfTheWild'', but the actual explanation given is that ''Breath of the Wild'' could be on ''any'' (one) timeline and [[ShrugOfGod the devs decided against choosing a specific one]].)

* It's revealed this is the origins of the Demi-Humans in ''Fanfic/HopeOfTheShieldHero'': [[spoiler:Ren Amaki: the current Sword Hero discovered writings hidden underneath the Three Heroes Church which detailed that Humanity first encountered [[ALittleBitBeastly Beastmen, Demi-Humans]], The Shield and Bow Heroes and several other Vassal Heroes after their world had merged with this one. Because of the newcomers RapidAging brought about whenever they leveled up, [[DoUntoOthersBeforeTheyDoUntoUs The Humans were afraid that the newcomers would eventually outpace Humans and eventually drive Humanity to extinction; so they committed themselves to destroying the Demi-Humans first.]] They managed to commit their own Spear and Sword Heroes to the task of exterminating the Demi-Humans, [[FaceHeelTurn and eventually managed to turn The Bow Hero to their side as well]]. However The Shield Hero remained steadfast to his people, and eventually helped the Beastmen and Demi-Humans to establish their own lands in this new world that would eventually become Siltvelt.]]

* It's revealed this is the origins of the Demi-Humans in ''Fanfic/HopeForTheShieldHero'': [[spoiler:Ren Amaki discovered writings hidden underneath the Three Heroes Church which detailed that Humanity first encountered [[ALittleBitBeastly Beastmen, Demi-Humans]], The Shield and Bow Heroes and several Vassal Heroes after their world had merged with this one. Because of the newcomers RapidAging brought about whenever they leveled up, [[DoUntoOthersBeforeTheyDoUntoUs The Humans were afraid that the newcomers would eventually outpace Humans and eventually wipe them out; so they committed themselves to destroying the Demi-Humans first.]] They managed to commit their own Spear and Sword Heroes to the task of exterminating the Demi-Humans, [[FaceHeelTurn and eventually managed to turn The Bow Hero to their side as well]]. However The Shield Hero remained steadfast to his people, and eventually helped the Beastmen and Demi-Humans to establish their own lands in this new world that would eventually become Siltvelt.]]

* In ''Film/SuperMarioBros'', the asteroid that apparently killed the dinosaurs actually split our reality into two. King Koopa wants to remerge them because the other universe has a major resource shortage and he wants our world's.

* ''VideoGame/XenobladeChronicles3'' has Aionios, a world created at the precise instant that the new worlds of ''VideoGame/XenobladeChronicles1'' and ''VideoGame/XenobladeChronicles2'' merged due to the two worlds colliding. A construct called Origin was meant to restore the worlds to their un-merged states, but was hijacked by the BigBad who has frozen time and is ensuring this merged world survives in what is referred to several times as "The Endless Now". The moment Origin is re-activated, the worlds will be allowed to de-merge and continue onward, and the game centers around activating Origin to allow that to happen. As is expected of such a merger between two old worlds, many familiar sights or regions appear, often with a new twist (for example, the Makna Wildwood jungle and abandoned city Morytha have merged to become the Maktha Wildwood, an overgrown abandoned city).

* ''VideoGame/XenobladeChronicles3'' has Aionios, a world created at the precise instant that the new worlds of ''VideoGame/XenobladeChronicles1'' and ''VideoGame/XenobladeChronicles2'' merged due to the two worlds colliding. A construct called Origin was meant to restore the worlds to their un-merged states, but was hijacked by the BigBad who has frozen time and is ensuring this merged world survives. The moment Origin is re-activated, the worlds will be allowed to de-merge and continue onward, and the game centers around activating Origin to allow that to happen. As is expected of such a merger between two old worlds, many familiar sights or regions appear, often with a new twist (for example, the Makna Wildwood jungle and abandoned city Morytha have merged to become the Morytha Wildwood, an overgrown abandoned city).

* ''VideoGame/XenobladeChronicles3'' has Aionios, a world created at the precise instant that the new worlds of ''VideoGame/XenobladeChronicles1'' and ''VideoGame/XenobladeChronicles2'' merged due to the two worlds colliding. A construct called Origin has frozen time and is ensuring this merged world survives, and the moment Origin is destroyed, the worlds will be allowed to de-merge and continue onward, and the game centers around destroying Origin to allow that to happen. As is expected of such a merger between two old worlds, many familiar sights or regions appear, often with a new twist (for example, the Makna Wildwood jungle and abandoned city Morytha have merged to become the Morytha Wildwood, an overgrown abandoned city).

** It turns out that [[spoiler: the whole series setting is one -- SelfDemonstrating/DoctorDoom and his timeline's [[ComicBook/FantasticFour Reed Richards]] have been using {{Cosmic Retcon}}s to add elements from other universes into what was originally the canon MCU, all for the sake of making an Earth that can fight off Thanos with minimal damage]].

* ''VideoGame/SuperSmashBrosUltimate'''s World of Light takes place in a land where several locations from existing franchises and original areas have been mashed together. For example, you can leave [[VideoGame/PokemonXAndY Lumiose City]] from the west to get to [[VideoGame/DonkeyKongCountry Kongo Jungle]], or instead go south and find [[VideoGame/{{Splatoon}} Moray Towers]] in a neighboring city [[ConsoleCameo made out of Nintendo video game consoles]].

* Just like its original comic version, ''Series/CrisisOnInfiniteEarths2019'' culminates in TheMultiverse being destroyed and then rebooted. The reality that emerges at the center of this new multiverse (dubbed Earth-Prime) contains elements from at least three previously distinct Earths -- Earth-1 (where the bulk of the pre-Crisis Series/{{Arrowverse}} took place), Earth-38 (the setting of ''Series/Supergirl2015''), and Earth-BL[[note]]Nickname granted by [[TheWikiRule the Arrowverse Wiki]] so they had something to call it[[/note]] (the Earth where ''Series/BlackLightning2018'' took place until "[[Recap/BlackLightning2018S3E9EarthCrisis Earth Crisis]]").

* In ''VideoGame/MortalKombatVsDCUniverse'', the BigBad is Dark Kahn, a merged version of Shao Kahn and Darkseid, who starts merging the realities of Mortal Kombat and the Franchise/DCUniverse, while feeding off the rage of the characters. He's also playing the heroes and villains of each world against each other, which think that the other is an invading army. Eventually, though teamwork, Superman and Raiden manage to defeat Dark Kahn and split the merged universe back into two and Dark Kahn himself back into Darkseid and Shao Kahn... who end up in each other's world and therefore powerless. Darkseid gets confined into the Netherrealm, while Shao Kahn gets banished to the Phantom Zone.

* ''WesternAnimation/TheOwlHouse'': It is revealed in the second season that [[BigBad Emperor Belos's]] grand scheme is to use Eda's PortalDoor and the FantasticCasteSystem he has spent decades building to perform an absolutely massive spell called "the Day of Unity" which will merge the Boiling Isles and Earth into a single dimension, an event that will dispel the WildMagic that underpins the Boiling Isles.

* The DC and Marvel multiverses briefly merge together into the ComicBook/AmalgamUniverse in ''DC vs Marvel''. Years later they are merged again (but not creating the Amalgam universe) in the ''ComicBook/JLAAvengers'' crossover.

* The now-defunct [[http://web.archive.org/web/20100519125927/http://members.fortunecity.com/xxycor/omniverse/index.html Omniverse Fan Fic Site]] features the [[Franchise/TheDCU DC]], Franchise/{{Marvel|Universe}}, Creator/{{Image|Comics}} and {{Creator/Wildstorm}} universes merge as one large SharedUniverse, which was the result of the embodiment of each universe[[note]]DC and Marvel's are the Brothers from ''ComicBook/MarvelVersusDC'' named [[NamedByTheAdaptation De'Cee and Mar'Vell]], while Image and [=WildStorm=] are given [[OriginalCharacter female embodiments named Im'Age and Aegis]].[[/note]] having a "cosmic orgy", called the Omniverse. Certain characters (Death, Merlin, Gods of myth, etc.) were [[CompositeCharacter combined with]] [[AlternateSelf their alternate counterparts]], thanks to Access' (now called Existence, the [[GuardianOfTheMultiverse guardian of the Omniverse]]) power to [[FusionDance fuse people]] with help from the Living Tribunal.

* ''Fanfic/ThereWasOnceAnAvengerFromKrypton'': According to [[WesternAnimation/GravityFalls Ford]] and [[WesternAnimation/TheOwlHouse Eda]], the Boiling Isles are the result of the remains of a dimension that was either externally destroyed or internally collapsed drawing in and mixing with the leftovers of other similarly destroyed dimensions.

* Just like its original comic version, ''Series/CrisisOnInfiniteEarths2019'' culminates in TheMultiverse being destroyed and then rebooted. The reality that emerges at the center of this new multiverse (dubbed Earth-Prime) contains elements from at least three previously distinct Earths -- Earth-1 (where the bulk of the pre-Crisis Series/{{Arrowverse}} took place), Earth-38 (the setting of ''Series/Supergirl2015''), and Earth-BL[[note]]FanNickname granted by [[TheWikiRule the Arrowverse Wiki]] so they had something to call it[[/note]] (the Earth where ''Series/BlackLightning2018'' took place until "[[Recap/BlackLightning2018S3E9EarthCrisis Earth Crisis]]").

* In ''ComicBook/WorldsCollide1996'', BigBad Rift decides to try this on a smaller scale, merging Metropolis with Dakota. It ends messily with the merged cities just being devastated (even further in Metropolis' case due to ''ComicBook/TheFallOfMetropolis'' event).

* In ''ComicBook/WorldsCollide'', BigBad Rift decides to try this on a smaller scale, merging Metropolis with Dakota. It ends messily with the merged cities just being devastated (even further in Metropolis' case due to ''ComicBook/TheFallOfMetropolis'' event).

* Played with in ''FanFic/DigimonChildrenOfTime''. It's explained that the different versions of the Digital World as seen in ''[[Anime/DigimonAdventure Adventure]]''[=/=]''[[Anime/DigimonAdventure02 Adventure 02]]'', ''[[Anime/DigimonTamers Tamers]]'', ''[[Anime/DigimonFrontier Frontier]]'', and ''[[Anime/DigimonSavers Data Squad]]'' were all once one composite world, but were broken apart when the original [=DigiDestined=] defeated the darkness present during that time. After Tai, Davis, Takato, Takuya, and Marcus' respective groups saved each one, they have since merged back together into a single world.

* In ''{{Series/Fringe}}'', due to the activation of [[spoiler: [[CosmicKeystone the Vacuum]] by Peter, a bridge is created between both the Prime and Alternate universe, preventing them from further collapse. This allows both universe's team to have the time to try and solve the problem.]] Before this, the dimensions bridging was a ''disaster.'' BodyHorror as people were {{TeleFrag}}ged with alternates who were standing in sorta-but-not-exactly the same spot,