Like That Show but with Mecha
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 Humongous Mecha, a work might redo the premise (usually a Spinoff, Spiritual Successor, or Follow the Leader), that is largely about them. Say there is an old fairy tale about a good spirit that has to stop a horde of The Fair Folk 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 Super Prototype 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 Sub-Trope of Recycled Premise. A Sister Trope to Instant Awesome, Just Add Mecha and Rent-a-Zilla, Recycled In Space.
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Anime & Manga
- Soukou no Strain, based on A Little Princess.
- Gankutsuou, based on The Count of Monte Cristo.
- Samurai 7, based on Seven Samurai.
- This is pretty much the entire point of Idolmaster: Xenoglossia, where The iDOLM@STER was basically a talent show sim.
- Kannazuki no Miko was actually based on an older Kaishaku work known as Cross Triangle, but now with giant mecha named after Japanese gods.
- The Dating Sim Graduation had an anime OVA follow-up, Sailor Victory, which was about mecha with ninja abilities.
- The Lyrical Nanoha franchise is an oddly gradual version of this. While it started a Magical Girl Warrior spinoff (to Triangle Heart 3: Sweet Songs Forever), it added more and more mecha elements and Shout Outs over time, culminating in Magical Record Lyrical Nanoha Force where the characters are military officers using Powered Armor.
- Japanese Spider-Man, when Spider-Man received various tropes that would eventually be absorbed into Super Sentai (Specifically Battle Fever J 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.
- Battle Fever J to the first two entries in the Super Sentai franchise, inspired by the Spider-Man example above. Afterwards it became a standard part of the formula.
- The CAMELOT Trigger setting for FATE Core is "King Arthur except in mech suits fighting evil robots in space.