In Gold, Silver, and Crystal you start off in Johto and after beating the Elite Four you are able to go to Kanto, the region from gen I. Some people like this idea since it's the first, and only game plus it's remakes, that you can go to two regions. Others didn't like it cause of the level curves and a few other reasons.

What do you think of it? Did you like the idea of two regions in one game at the time gen II released?