[[quoteright:240:http://static.tvtropes.org/pmwiki/pub/images/princess_to_strain_4681.jpg]]
[[caption-width-right:240:[-You can't fit even one giant robot in a [[VictorianLondon Victorian boarding house]]-][[note]]''Literature/ALittlePrincess''[[/note]][-, but you can fit ''plenty'' in an [[SpaceOpera interstellar war]]-][[note]]''Anime/SoukouNoStrain''[[/note]].]]

'''IMPORTANT:''' ''This has to be a direct recycling of a premise, or follow up to a work. Simply having some similarities to another show is not this trope.''

Whenever a work isn't about HumongousMecha, a work might redo the premise (usually a {{Spinoff}}, SpiritualSuccessor, or FollowTheLeader), that ''is'' largely about them.

Say there is an old fairy tale about a good spirit that has to stop a horde of TheFairFolk from invading a village. Then someone makes an adaptation where the fair folk are aliens that pilot giant robots, and the good spirit turns out to be the only one who can pilot the SuperPrototype and save Earth.

'''Note that almost all other mecha related tropes can apply, as long as the previous/source work did not have mecha.'''

A SubTrope of RecycledPremise.

A SisterTrope to InstantAwesomeJustAddMecha and RentAZilla, RecycledInSpace.

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!!Examples

[[foldercontrol]]

[[folder:Anime & Manga]]
* ''Anime/SoukouNoStrain'', based on ''Literature/ALittlePrincess''.
* ''Anime/{{Gankutsuou}}'', based on ''Literature/TheCountOfMonteCristo''.
* ''Anime/SamuraiSeven'', based on ''Film/SevenSamurai''.
* This is pretty much the entire point of ''Anime/IdolmasterXenoglossia'', where ''VideoGame/TheIdolmaster'' was basically a talent show sim.
* ''Manga/KannazukiNoMiko'' was actually based on an older Kaishaku work known as ''Cross Triangle'', but now with giant mecha named after Japanese gods.
* The DatingSim ''VisualNovel/{{Graduation}}'' had an anime {{OVA}} follow-up, ''Anime/SailorVictory'', which was about mecha with [[InstantAwesomeJustAddNinja ninja abilities]].
* The ''Franchise/LyricalNanoha'' franchise is an oddly gradual version of this. While it started a MagicalGirlWarrior spinoff (to ''VideoGame/TriangleHeart3SweetSongsForever''), it added more and more mecha elements and {{Shout Out}}s over time, culminating in ''Manga/MagicalRecordLyricalNanohaForce'' where the characters are military officers using PoweredArmor.
[[/folder]]

[[folder:Live-Action TV]]
* Japanese ''[[Series/SpiderManJapan Spider-Man]]'', when ''Franchise/SpiderMan'' received various tropes that would eventually be absorbed into ''Franchise/SuperSentai'' (Specifically ''Series/BattleFeverJ'' onwards, as stated later). Spider-Man gets his powers and costume from an ancient alien race, and gets a car and a giant robot to go along with them.
* ''Series/BattleFeverJ'' to [[EarlyInstallmentWeirdness the first two entries]] in the ''Franchise/SuperSentai'' franchise, inspired by the ''Spider-Man'' example above. Afterwards it became a standard part of the formula.
[[/folder]]

[[folder:Pinballs]]
* Done literally in the pinball conversion kit ''Pinball/{{Gamatron}},'' which takes Creator/SternElectronics' ''Pinball/{{Flight 2000}}'' playfield and repurposes it into a game about a HumongousMecha attack.
* Similarly, the "Warbot" table of ''VideoGame/{{Silverball}}'' is a straight port of "Excalibur" from ''VideoGame/EpicPinball,'' but with robots added.
[[/folder]]

[[folder:Toys]]
* ''Toys/BBSenshiSangokuden'' is a toyline using classic ''Franchise/{{Gundam}}'' designs, but which storyline and characters are based on ''Literature/RomanceOfTheThreeKingdoms''.
[[/folder]]

[[folder:Western Animation]]
* The [[WesternAnimation/ThunderCats2011 2011 reboot]] of ''WesternAnimation/ThunderCats'' had mechs as part of the LostTechnology the BigBad was [[SealedEvilInACan buried with]].
[[/folder]]

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