>>56703770>non-canon sourceOh-hohoho! Suuure... if we don't count the fact that Ash Greninja is actually in the game.
The anime very clearly works in lockstep WITH the games. It's been like this since Gen 2, when Ho-oh showed up before its reveal to the west, and when Lucario was literally the FIRST Gen 4 Pokemon ever designed.
A non-canon source to the games, it might be, but it is a source that is marching in lockstep almost always.