Luke888 on 16 January 2016
Pokkén is co developed by GameFreak and Bandai Namco so no Nintendo devs are currently occupied for that game, also I feel like Pikmin 4 has to be complete by now or at least really near to that state since Miyamoto's inteview took place in early 2015...
Answering your question: not many as far as we know, at least for Wii U and 3DS, Intelligent Systems has been done with FE Fates for a while, HAL Laboratory is probably finishing the final update for Smash (if it isn't already done). most if not all EAD teams minus the Zelda one are currently working on unkown projects...
