It should let you, My brother and i played Blackops 2 that way, he used the gamepad i used the pro controller, What does it say when you try to sync them both?
Thanks for the response. It doesn't say anything. It just turns the opposite controller off. Only one is synced at a time. We tried going into the menu to sync them both, but it only lets us account for the pro controller (or none). That said, the Gamepad stays synced, but once we use it, the Wii U Pro unsyncs.