Oh please, Wargle is so based on Native Americans, there's not a doubt as far as I'm concerned. It's a war eagle, the eagle was a common symbol of war and valor for Native Americans, and then you have its obvious Native chief headdress.
But Pokemon have been based on foreign legends and myths and symbols even when the regions have been based in Japan, so that point is pretty much moot regardless.
Also, there weren't too many black people (looking at you Aloe) in China last time I checked (which was never, but you know) ;o
This whole argument basically stems from patriotism for whatever country, but oh well, 'cause I know I'd love for Isshu to be based on NYC as much as any of 'em 8>
USA
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USA