So far only four games.
The Legend of Zelda: Breath of the Wild (P)
MarioKart 8 Deluxe (P)
Splatoon 2 (P)
Super Mario Odyssey (P)
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.