I just know unova Is based on new york and the new x and y is based on France.
Kanto: Kantō region Johto: Kansai, Tokai and eastern Shikoku Hoenn: Kyushu Sinnoh/Hisui: Hokkaido Unova: New York metropolitan area Kalos: Metropolitan France Alola: Hawaii Galar: Great Britain Paldea: Iberian Peninsula
Region (Bulbapedia)
Hope I helped!
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