>>35374259This isn't really a response to you, but who says popularity doesn't matter? I mean, it may not be the most important thing, but I'm sure it is a factor in most cases.
It wasn't a factor with Greninja, because it hadn't been revealed yet.
Depending on when 5mash and SuMo started development (and whether we get a gen 7 mon in the first place), popularity could be taken into account.