Isshu region's possible orgin is New York.

[Rainbow Yoshi]

Salnax said:

Rainbow Yoshi said:

This is not a innovative idea (in my opinion one of less innovative ideas in Pokémon history), however if it boosts sales then it boosts sales. Be prepared for Tokyo and London based regions.

There already is a Tokyo based area. Compare the original Kanto region to the Tokyo bay area.

Thank you for correcting me. Am I right to say that the Sinnoh region is based off Hokkaido?