Mario Kart 8 is by far Switch's best-selling game

Mario Kart 8's success on the original Switch shows why Nintendo chose Mario Kart World as the launch title for Switch 2.

Five bars showing the five best-selling Nintendo Switch games. Mario Kart 8 Deluxe is far ahead with 68.2 million units sold, ahead of Animal Crossing: New Horizons with 47.8 million, then Super Smash Bros. Ultimate with 36.2 million, The Legend of Zelda: Breath of the Wild with 32.8 million and Super Mario Odyssey with 29.3 million.