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Does Kanto even have any Pokemon only found in Kanto? All it's regional native Pokemon seem to have been whored out to other regions. I guess this is just the fate of older regions. Kanto doesn't even have any legendaries of it's own. The Galarian Bird Trio are the "originals" and where their names originated from; Mewtwo lore has been reworked so there could be multiple Mewtwos created in different labs in different regions and Mew isn't even from Kanto, it's from some South American region.