Except for when a new generation comes up and he travels to a new region, with the exception of the Orange IslanRAB and Johto of course.
I'm honestly looking foreword to this movie. I've always been able to enjoy Pokemon movies. Even some of my least favorite movies, such as the Giratina and Dexoys movies, are fun to watch at the very least. I'm mainly expecting another fun movie since I haven't been bored watching one of the movies yet.
I'm especially interested in this Phantom Ruler Z since it's quite possible that it's a new Pokemon. The initial teaser trailer for this movie has showed just Celebi and the legendary dogs, similar to how the eighth movie, when it was first revealed, focused on Mew. In fact, if I remeraber correctly, the first trailer for the eighth movie also showed Mew flying around as if it was being chased, similar to Celebi. Plus, Lugia's codename when news of the second movie came around was "X". Of course, it isn't set in stone, but I noticed those similarities between the two trailers so it is possible. We won't know for sure until a second trailer or poster comes up, just as there wasn't a sign of Lucario for the eighth movie until the second teaser trailer came.