I'm honestly not sure if it's been mentioned here or if I even did so myself, but Pokémon Rumble Rush is out for IOS now, and I have been enjoying it. Doesn't seem any different than past Rumble games, and the monetization aspect is absolutely not required to play. I've yet to see any aspect of it that you need to spend money for to enjoy the game 'properly'. On the flip side, apparently Pokémon Duels is shutting down. I tried it recently actually and didn't care for it, but kind of shows the problems we'll run into with Pokémon game apps going forward. At any point they can just stop it and unlike handheld games these games will just be 'gone' except for those who had it and don't delete it.