Wyrdness on 31 July 2018
https://gematsu.com/2018/07/switch-worldwide-sales-top-19-67-million-mario-tennis-aces-sales-top-1-39-million
Super Mario Odyssey – 11.17 million
Mario Kart 8 Deluxe – 10.35 million
The Legend of Zelda: Breath of the Wild – 9.32 million
Splatoon 2 – 6.76 million
1-2 Switch – 2.45 million
ARMS – 2.01 million
Kirby: Star Allies – 1.89 million
Xenoblade Chronicles 2 – 1.42 million
Donkey Kong Country: Tropical Freeze – 1.40 million
Mario Tennis Aces – 1.38 million
