Game Freak will only bring Pokémon to mobile if it solves a 'problem'

[DerpSandwich]

I think he basically means that Pokemon will go mobile when handhelds finally die entirely. There will come a day when Nintendo releases a handheld and it fails so miserably that it's obvious the platform just doesn't work anymore, and when that day comes we'll start getting Pokemon and other games on mobile. I don't think it will happen before that time, though.