Switch million sellers as of date for those who want that info:
Mario Odyssey =11.17m
Mario Kart 8 =10.35m
Zelda: Breath of the Wild =9.32m
Splatoon 2 =6.76m
1-2 Switch =2.45m
ARMS =2.01m
Xenoblade Chronicles 2 =1.42m
Kirby Star Allies =1.89m
Donkey Kong Tropical Freeze =1.4m
Mario Tennis Aces =1.38m
Nintendo Labo =1.39m