History Main / SingleSpecimenSpecies

** The play and the musical's DirectorCut have them breeding and taking over America.

*** There are other legendary Pokémon that are considered godlike, but it's more ambiguous if there are more than one of them or not. For instance, [[VideoGame/PokemonSwordAndShield Eternatus]] is a DraconicAbomination powerful enough to qualify, but explicitly alien so there may be more out in space.

** There are also a number of cases where these "god" Pokémon made unique creations in some way or another: Ho-oh resurrected and transformed three unknown Pokémon into [[VideoGame/PokemonGoldAndSilver Raikou, Entei, and Suicune]], Arceus directly created [[VideoGame/PokemonDiamondAndPearl Uxie, Mesprit, Azelf, Dialga, Palkia, and Giratina]] (though it is known to make seconds of the latter three... but according to WordOfGod it has to recreate the world ''from scratch'' to do so), and an unnamed dragon [[LiteralSplitPersonality split itself]] into [[VideoGame/PokemonBlackAndWhite Reshiram, Zekrom, and Kyurem]]. Regigigas is also believed to have built the other "Regi" golems, but it's implied that it made multiples of each.
** Another group don't necessarily have the devastating power that preclude there being more than one, but are treated as singular figures of legend akin to Myth/RobinHood and Myth/KingArthur: [[VideoGame/PokemonGoldAndSilver Celebi]], [[VideoGame/PokemonRubyAndSapphire Jirachi]], [[VideoGame/PokemonBlackAndWhite the "Three Musketeers"]] (Cobalion, Terrakion, and Virizion), some genies ([[VideoGame/PokemonBlackAndWhite Tornadus, Thundurus, Landorus]], and [[VideoGame/PokemonLegendsArceus Enamorus]]), [[VideoGame/PokemonSwordAndShield Zacian, Zamazenta, Calyrex and its steeds Glastrier and Spectrier]], and [[VideoGame/PokemonScarletAndViolet Ogerpon and the Loyal Three]] (Okidogi, Munkidori, and Fezandipiti). There ''could'' quietly be at least a few of each, but the stories don't treat them that way.[[note]]The Loyal Three are explicitly unique, but there may be, or once were, other members of species that didn't transform like they did.[[/note]]

*** [[VideoGame/PokemonSwordAndShield Kubfu/Urshifu]] are also implied to have a decent population, with at least three specimens confirmed (the player's, Master Mustard's, and one meant to go to Leon).

** ''VideoGame/PokemonScarletAndViolet'' feature another aversion in Paradox Pokémon, who are very much like the Ultra Beasts in that they are rare and distinct from normal Pokémon but not unique and just transported from somewhere else (in this case, through time -- [[AmbiguousSituation we think]]). Even the ones labeled "Legendary", Koraidon and Miraidon, are believed to be simply ancestors and descendants, respectively, of the modern Cyclizar species; and [[spoiler:the player encounters more than one]]. But it gets strange when Paradox versions of existing Legendaries begin to emerge -- "Walking Wake" and "Raging Bolt" in particular appear to be reptilian prehistoric versions of Suicune and Raikou, which flies in the face of the existing lore.

* Marko from ''Literature/TheSanguineChronicles'' is a half-vampire, half-werewolf… which for reasons outlined in the story, is supposed to be impossible.

* ''VideoGame/ShinMegamiTensei'' features numerous [[PublicDomainCharacter gods and demons]] as its {{Mons}}, and while lesser demons like the [[HotAsHell Lilim]] or [[OurCryptidsAreMoreMysterious Mothmen]] can exist in quantity, the likes of [[OlympusMons Zeus and Loki]] necessarily fall under this trope. Several games enforce it in gameplay, most notably the ''VideoGame/DevilSurvivor'' subseries where various demons are marked as "Unique" so the player can only have one of them in their party at a time.

** There are also a number of cases where these "god" Pokémon made unique creations in some way or another: Ho-oh resurrected and transformed three Pokémon into [[VideoGame/PokemonGoldAndSilver Raikou, Entei, and Suicune]], Arceus directly created [[VideoGame/PokemonDiamondAndPearl Uxie, Mesprit, Azelf, Dialga, Palkia, and Giratina]] (though it is known to make seconds of the latter three... but according to WordOfGod it has to recreate the world ''from scratch'' to do so), and an unnamed dragon [[LiteralSplitPersonality split itself]] into [[VideoGame/PokemonBlackAndWhite Reshiram, Zekrom, and Kyurem]]. Regigigas is also believed to have built the other "Regi" golems, but it's implied that it made multiples of each.
** Another group don't necessarily have the devastating power that preclude there being more than one, but are treated as singular figures of legend akin to Myth/RobinHood and Myth/KingArthur: [[VideoGame/PokemonGoldAndSilver Celebi]], [[VideoGame/PokemonRubyAndSapphire Jirachi]], [[VideoGame/PokemonBlackAndWhite the "Three Musketeers"]] (Cobalion, Terrakion, and Virizion), some genies ([[VideoGame/PokemonBlackAndWhite Tornadus, Thundurus, Landorus]], and [[VideoGame/PokemonLegendsArceus Enamorus]]), [[VideoGame/PokemonSwordAndShield Zacian, Zamazenta, and Calyrex and its steeds Glastrier and Spectrier]]. There ''could'' quietly be at least a few of each, but the stories don't treat them that way.

*** [[VideoGame/PokemonBlackAndWhite Keldeo]] had parents (but may be the LastOfItsKind now).

** ''VideoGame/PokemonScarletAndViolet'' feature another aversion in Paradox Pokémon, who are very much like the Ultra Beasts in that they are rare and distinct from normal Pokémon but not unique and just transported from somewhere else (in this case, through time -- [[AmbiguousSituation we think]]). Even the ones labeled "Legendary", Koraidon and Miraidon, are believed to be simply ancestors and descendants, respectively, of the modern Cyclizar species; and [[spoiler:the player encounters more than one]]. But it gets strange when Paradox versions of existing Legendaries begin to emerge -- "Walking Wake" in particular appears to be a reptilian prehistoric version of Suicune, which flies in the face of the existing lore.

* ''VideoGame/SonicTheHedgehog'': It's implied that Tails is the only multiple-tailed fox on the planet.
* In ''VideoGame/StarcraftII'', two unique Zerg entities appear during the ''Heart of the Swarm'' campaign. Izsha probably doesn't count so much, given she [[WasOnceAMan was mutated from a Terran woman]], but Abathur is a totally unique abomination created by the Overmind itself to serve as the chief geneticist for the Swarm; Abathur even notes during the campaign that it would be difficult, if not impossible, for his geno-structure to be recreated and for more like him to be made.

* Franchise/{{Godzilla}} and other more traditional kaiju sometimes are shown to have offspring, so they're right out. However, the viewers see no indication of a Gojiru population from which it might have sprang. The known Godzilla population is Godzilla ([[Film/{{Gojira}} 1954]]), Godzilla (Showa), Minya, Godzilla (Heisei), Godzilla Junior, Godzilla Millennium, Godzilla [[Film/GodzillaTokyoSOS SOS]], and [[Film/GodzillaFinalWars Final Wars]] Godzilla. However, thanks to CanonDisContinuity, it's hard to tell if there are any others or of what relation they all are to one another in the first place. In ''Film/{{Godzilla 2014}}'', he is [[LastOfHisKind the last survivor of a race of alpha predators]]. Film/ShinGodzilla is the first of a species actually ''created'' by radiation [[spoiler:and marine microorganisms]], not simply awoken or empowered by it, [[spoiler:[[TrulySingleParent though potentially not the last]].]]

** For a given definition of ''species'', Andres Duvall from ''TabletopGame/{{Ravenloft}}'' might qualify, being a ''Bard'' lich. His existence is entirely by accident, having tried to use a potent spell book as shield against a Lightning Bolt spell. Not only is he unique in having become a lich without actually dying (he's still undead, he just never went through the process of normal death), but also in being a Bard, since only wizards can become liches in most cases.

** On ''[[Series/StarTrekTheOriginalSeries The Original Series]]''
*** The creature that was Jack The Ripper. An entity that fed on fear and death, who claimed to be as old as time.
*** The Guardian of Forever. While the ruins around it seem to imply that it was artificially created, it claims to have always been. (Or at least to be older than Earth's sun.)[[note]]At least [[Literature/TheQContinuum one EU trilogy]] claims it was built by the Q way back when they were still mortal beings.[[/note]]
** On ''[[Series/StarTrekTheNextGeneration The Next Generation]]''
*** Ronin is a ghost-like lifeform apparently from Earth that bonds symbiotically with a human female, giving her pleasure in exchange for some kind of sustenance.
*** The "Crystalline Entity" is a space-faring creature that consumes organic matter from entire planets. No other examples of its species were seen (until the MMORPG came out, at least).
** On ''[[Series/StarTrekVoyager Voyager]]''
*** The Telepathic Pitcher Plant, a giant space monster that would MindControl the crews of passing starships to fly into its mouth so it could eat the ship whole.
*** The Nebula Creature (a massive organism that Voyager mistook for a nebula.)
*** Bevvox, the founder of The Think Tank, a huge organism which previously wandered the stars by itself for thousands of years. Unlike some of the others listed here, instead of bragging about how ancient it is, it's apparently sensitive about its age.

Creators contemplating for the existence of more of these tends to be a gap in their WorldBuilding, but tends to be a case where the MST3KMantra applies in full force. It would be hard for an ecosystem to support more than one of it, after all, so just enjoy the game. And there are ways of justifying the existence of one single creature in works that [[{{Fantasy}} bypass]] natural laws, [[SciFi at least as we know them]].

** Another group don't necessarily have the devastating power that preclude there being more than one, but are treated as singular figures of legend akin to Myth/RobinHood and Myth/KingArthur: [[VideoGame/PokemonGoldAndSilver Celebi]], [[VideoGame/PokemonRubyAndSapphire Jirachi]], [[VideoGame/PokemonBlackAndWhite the "Three Musketeers"]] (Cobalion, Terrakion, and Virizion), some genies ([[VideoGame/PokemonBlackAndWhite Tornadus, Thundurus, Landorus]], and [[VideoGame/PokemonLegendsArceus Enamorus]]), [[VideoGame/PokemonSwordAndShield Zacian, Zamazenta, and Calyrex and its steeds Glastrier and Spectrier]]. There ''could'' quietly be more than one, but the stories don't treat them that way.

** ''VideoGame/PokemonScarletAndViolet'' feature another aversion in Paradox Pokémon, who are very much like the Ultra Beasts in that they are rare and distinct from normal Pokémon but not unique and just transported from somewhere else (in this case, through time -- [[AmbiguousSituation we think]]). Even the ones labeled "Legendary", Koraidon and Miraidon, are believed to be simply ancestors and descendants, respectively, of the modern Cyclizar species; and [[spoiler:the player encounters more than one]]. But it gets strange when Paradox Legendaries begin to emerge -- "Walking Wake" in particular appears to be a reptilian prehistoric version of Suicune, which flies in the face of the existing lore.

** A number of Pokémon [[OlympusMons are on the level of demigods]] and almost certain to be one-of-a-kind: [[VideoGame/PokemonRubyAndSapphire Groudon, Kyogre, Rayquaza, Jirachi]], [[VideoGame/PokemonDiamondAndPearl Regigigas, Arceus]], [[VideoGame/PokemonXAndY Xerneas, Yveltal]], [[VideoGame/PokemonSunAndMoon Alola's "Tapu" guardian deities]] (Tapu Koko, Tapu Lele, Tapu Bulu, and Tapu Fini), [[VideoGame/PokemonUltraSunAndUltraMoon Necrozma]], [[VideoGame/PokemonSwordAndShield Calyrex]], and [[VideoGame/PokemonScarletAndViolet Paldea's "Treasures of Ruin"]] (Ting-Lu, Chien-Pao, Wo-Chien, and Chi-Yu). [[VideoGame/PokemonXAndY Zygarde]] might also count [[TheWormThatWalks depending on how you define "single specimen"]].

** Other than "god" Pokémon, you've also got one-off results of human experimentation: [[VideoGame/PokemonRedAndBlue Mewtwo]], [[VideoGame/PokemonBlackAndWhite Genesect]], and [[VideoGame/PokemonSunAndMoon Magearna]]. There's also [[VideoGame/PokemonSunAndMoon Type: Null/Silvally]], which is a semi-aversion -- only three specimens exist; one is owned by Gladion, one goes to the ''Sun and Moon'' player character, and the third remains unaccounted for. Though as of [[VideoGame/PokemonSwordAndShield the following game]], the Type: Null research was stolen and at least a fourth one was made, being granted to the ''Sword and Shield'' player character.

** ''VideoGame/PokemonScarletAndViolet'' feature another aversion in Paradox Pokémon, who are very much like the Ultra Beasts in that they are rare and distinct from normal Pokémon but not unique and just transported from somewhere else (in this case, through time -- [[AmbiguousSituation we think]]). Even the ones labeled "Legendary", Koraidon and Miraidon, are believed to be simply ancestors and descendants, respectively, of the modern Cyclizar species; and [[spoiler:the player encounters more than one]].

* ''ComicBook/TheSandman'': When the protagonist Dream, Morpheus, [[spoiler:dies, there is a replacement Dream from a child named Daniel. Although Morpheus is definitely dead, Dream isn't. While the new Dream came from Daniel, he is not Daniel. And while the new and old Dream are treated differently by the rest of the cast, they aren't quite considered separate beings. As Abel put it, it's the same concept but a different perspective.]]

* Ego from ''Film/GuardiansOfTheGalaxyVol2'' formed alone in space and had to search the universe for other lifeforms. He refers to himself as a Celestial, it's not clear if he's related to the "celestial beings" from the [[Film/GuardiansOfTheGalaxy first movie]] which were based on the Celestials from the comics. This is possibly implying that Ego is a [[https://en.wikipedia.org/wiki/Boltzmann_brain Boltzmann brain]].

* ''VideoGame/{{Shin Megami Tensei}}'' features numerous [[PublicDomainCharacter gods and demons]] as its {{Mons}}, and while lesser demons like the [[HotAsHell Lilim]] or [[OurCryptidsAreMoreMysterious Mothmen]] can exist in quantity, the likes of [[OlympusMons Zeus and Loki]] necessarily fall under this trope. Several games enforce it in gameplay, most notably the VideoGame/{{Devil Survivor}} subseries where various demons are marked as "Unique" so the player can only have one of them in their party at a time.

* ''Videogame/FireEmblemAwakening'' has Nah, the [[HalfHumanHybrid half-human]], half-[[OurDragonsAreDifferent Manakete]] daughter of Nowi, who, according to the Manakete princess Tiki in their [[RelationshipValues support conversations]], is the first and (presumably) only non-full-blooded Manakete in the history of Ylisse (and possibly Archanea, as Awakening is a loose sequel of the game). However, this gets averted if the player marries Nowi or Tiki herself.

* Adam in ''Literature/TheBible'' qualified, before Eve entered the picture. {{God}} himself too.

** In ''WesternAnimation/MuppetBabies'', he's often classified as a "weirdo".

* ''WebOriginal/MysteryFleshPitNationalPark'': The titular Mystery Flesh Pit is not only the only known member of the species ''Immanis colosseus'', it is also the only known occupant of its own ''phylum'' - Immanemqa.

* ''Webcomic/TheInexplicableAdventuresOfBob'': Molly qualified until [[NamesTheSame Dean Martin]] cloned her to make Golly.

** A number of Pokémon [[OlympusMons are on the level of gods]] and almost certain to be one-of-a-kind: [[VideoGame/PokemonRubyAndSapphire Groudon, Kyogre, Rayquaza]], [[VideoGame/PokemonDiamondAndPearl Regigigas, Arceus]], [[VideoGame/PokemonXAndY Xerneas, Yveltal]], [[VideoGame/PokemonSunAndMoon Alola's "Tapu" guardian deities]] (Tapu Koko, Tapu Lele, Tapu Bulu, and Tapu Fini), and [[VideoGame/PokemonUltraSunAndUltraMoon Necrozma]]. [[VideoGame/PokemonXAndY Zygarde]] might also count [[TheWormThatWalks depending on how you define "single specimen"]]. There are other legendary Pokémon that are considered godlike, but it's more ambiguous if there are more than one of them or not.

** As of ''VideoGame/PokemonLegendsArceus'', it is revealed that Arceus itself can grant anyone it deems worthy enough a small "fragment" of itself so it can inhabit the world it created. This may imply that all instances of it being owned by a trainer are also "fragments" of the one true Arceus.

** There are also a few definite aversions: [[VideoGame/PokemonRubyAndSapphire Latias]], [[VideoGame/PokemonLetsGoPikachuAndLetsGoEevee Meltan]], and [[VideoGame/PokemonSwordAndShield Zarude]] are all described as living in groups in at least one Pokédex entry (and Latias' SpearCounterpart Latios would logically be the same), plus Meltan evolve into Melmetal via FusionDance with one another. [[VideoGame/PokemonSwordAndShield Kubfu/Urshifu]] are also implied to have a decent population, with at least two specimens confirmed (the player's and Master Mustard's). The "Regi" golems ([[VideoGame/PokemonRubyAndSapphire Regirock, Regice, and Registeel]]) have been found in temples dedicated to them in multiple regions, making it unlikely that there's just one of each shared among all the temples (and this would extend to [[VideoGame/PokemonSwordAndShield Regieleki and Regidrago]], though they've only been found once so far). [[VideoGame/PokemonRubyAndSapphire Deoxys]] and [[VideoGame/PokemonXAndY Diancie]] come from rare but theoretically-repeatable mutations. [[VideoGame/PokemonDiamondAndPearl Manaphy]] are capable of breeding (though their offspring in captivity are Phione and not more Manaphy). [[VideoGame/PokemonBlackAndWhite Keldeo]] had parents (but may be the LastOfItsKind now). [[VideoGame/PokemonSunAndMoon Solgaleo and Lunala]] have their own way of breeding exclusively with each other. [[VideoGame/PokemonRedAndBlue Articuno, Zapdos, and Moltres]] were finally confirmed to not be unique over two decades after their debut, as ''VideoGame/PokemonLetsGoPikachuAndEevee'' lets you find multiples in the post-game and ''VideoGame/PokemonSwordAndShield'' introduces foreign variants of the species.
** While distinct from Legendary Pokémon, the Ultra Beasts are another aversion, since multiple specimens of each one are seen/encountered at various points. Of course, they have no real "legend" and are simply Pokémon which hail from a completely different dimension. Solgaleo and Lunala, despite fitting more under the OlympusMons umbrella, are considered Ultra Beasts and likewise aren't single specimens either. The one Ultra Beast that ''is'' implied to be one of a kind is Necrozma, as [[spoiler:it was revered as a PhysicalGod in Ultra Space in its original form, and is even referred to with the name, "The Blinding One"]].

* ''VideoGame/{{Shin Megami Tensei}}'' features numerous [[PublicDomainCharacter gods and demons]] as its {{Mons}}, and while lesser demons like the [[HornyDevils Lilim]] or [[OurCryptidsAreMoreMysterious Mothmen]] can exist in quantity, the likes of [[OlympusMons Zeus and Loki]] necessarily fall under this trope. Several games enforce it in gameplay, most notably the VideoGame/{{Devil Survivor}} subseries where various demons are marked as "Unique" so the player can only have one of them in their party at a time.

* Tales of the [[StockNessMonster Loch Ness Monster]]. Unless it actually is a type of aquatic dinosaur, if it exists. That would make it a LastOfHisKind scenario.

* ''Webcomic/{{Aurora|2019}}'': Kendal is a unique being who is neither a human nor a god, originating as the empty body of a god given life.
* In ''Webcomic/ElGoonishShive'', the Writer's Block is a block with cat ears, paws, and tail with its name on the side and only one has ever been seen in the comic.
* The dino from ''[[Webcomic/FifteenMinds Blue Moon Blossom]]'' is a sauropod, and the only one of their kind depicted in the comic. In fact, they're also the only non-avian dinosaur in the entire story, adding to their vaguely 'other' feel.

* In ''Webcomic/TheInexplicableAdventuresOfBob,'' Molly qualified until [[NamesTheSame Dean Martin]] cloned her to make Golly.

*** To a lesser extent, several other dinosaurs have become, or are implied to be, the LastOfHisKind as of this film--particularly, Blue is directly stated to be the last living ''Velociraptor'' after the rest of the Raptor Squad was killed in the previous film and Rexy, the original Tyrannosaurus rex is the only known surviving member of her species. [[spoiler: However, the fourth season of ''WesternAnimation/JurassicWorldCampCretaceous'' revealed that there are both two raptors and two Tyrannosaurs taken from Isla Sorna now living on an island belonging to Mantah Corp, meaning Blue and Rexy are not yet the last of their kinds.]]

* ''VideoGame/Pikmin1'': The Puffstool and Smoky Progg are fought only once and do not appear in the sequel games. The Progg, however, is claimed to be a mutant baby Mamuta by the end credits.

* The Thorian in ''Franchise/MassEffect'' was the only specimen of its species shown or mentioned. the fact that there should logically be other thorians is never brought up even once.
* It's implied that Tails from ''VideoGame/SonicTheHedgehog'' is the only multiple-tailed fox on the planet.