Ring Fit Adventure crossed a million copies sold in Japan. Mario Kart 8 is about to cross 3 million. Animal Crossing close to 5 million.
June 8, 2020 to June 14, 2020
[NSW] Animal Crossing: New Horizons (Nintendo, 03/20/20)  77,259 (4,860,488)
[NSW] Clubhouse Games: 51 Worldwide Classics (Nintendo, 06/05/20)  47,181 (111,624)
[NSW] Ring Fit Adventure (Nintendo, 10/18/19)  20,023 (1,006,069)
[NSW] Mario Kart 8 Deluxe (Nintendo, 04/28/17)  9,727 (2,986,454)
[NSW] Splatoon 2 (Bundle Version Included) (Nintendo, 07/21/17)  8,692 (3,455,342)
[NSW] Xenoblade Chronicles: Definitive Edition (Nintendo, 05/29/20)  7,950 (115,525)
[NSW] Minecraft: Nintendo Switch Edition (Bundle Version Included) (Microsoft, 06/21/18)  6,968 (1,413,900)
[NSW] Pokemon Sword / Shield (The Pokemon Company, 11/15/19)  6,741 (3,621,068)
[NSW] Super Smash Bros. Ultimate (Nintendo, 12/07/18)  6,634 (3,725,316)
[NSW] Super Mario Party (Nintendo, 10/05/18)  4,855 (1,467,338)
Hardware Sales (followed by lifetime sales)
Switch  38,685 (11,575,724)
Switch Lite  16,502 (2,302,362)
PlayStation 4 Pro  5,381 (1,551,151)
PlayStation 4  3,902 (7,612,259)
New 2DS LL (including 2DS)  920 (1,719,354)
New 3DS LL  84 (5,887,760)
Xbox One X  90 (20,530)
Xbox One S  14 (93,329)