>>32969236In terms of popularity, it seems to be:
Rowlet>Litten
Inciniroar>Decidueye
Also, something more important to note is how neither Inciniroar or Decidueye are near as popular as Greninja even before it got it's big showcase in the anime. In the end which ever Pokemon gets the showcase in the anime, Inciniroar or Decidueye, will be the next Pokemon to take the spotlight in SM. With the Inciniroar push in M20 it gives credibility to the idea that Inciniroar will be Ashs future mon.
I personally believe it'll be Inciniroar, given reasons I've listed earlier. But if it's Decidueye then I'm fine with that. Although I do hope it's not Rowlet who evolves because I love that smushy birb.