>>18739091
The 3DS games began a resurgence after the controversial Gen V sank the franchise to bottom low numbers in sales, but when Pokemon Go came out people went absolutely crazy over it.
With geek shit being embraced by the masses and going full mainstream since then, Pokemon is only growing more popular than ever. That's quite ironic too since every gen is worse than the one before, but that's how it is.
I have the theory that R34 contributes to its popularity too, and that GameFreak are aware of it and capitalizing on it by releasing waifus to appeal to as many kinks as possible. Last few gens have had girls that for the muscled chicks or GILF enjoyers, for example.