>>57085450They probably liked it at first, but now they actively shit on Sinnoh every chance they get because it caused controversy due to Mt. Coronet filtering all the little Kenjis of Japan to a point where they got angry letters from kids about how it was too difficult to get through.
The only reason it doesn't seem as obvious compared to the likes of Johto is because Sinnoh is home to shillmons like Lucario and (since Gen 7) Rotom, who continue to be promoted to this day.
