The sales

The budgets

The reason why Sony is doubling down on Spider-Man, God of War and Horizon it seems. And why they want Naughty Dog back on AAAA single player games.
The competition
Wii Sports — Wii — 82.90 million
Mario Kart 8 — Wii U/Switch — 65.47 million
Pokémon Red/Green/Blue/Yellow — GB/GBA/VC — 59.52 million
Super Mario Bros. — NES/GBC/GBA/3DS(VC) — 48.24 million
Animal Crossing: New Horizons — Switch — 43.38 million
Pokémon Gold/Silver/Crystal — GBC/DS — 42.21 million
Pokémon Diamond/Pearl/Platinum — DS/Switch — 40.34 million
Pokémon Ruby/Sapphire/Emerald — GBA/3DS — 37.88 million
Mario Kart Wii — Wii — 37.38 million
Tetris — NES/GB — 35.84 million
Wii Sports Resort — Wii — 33.14 million
The Legend of Zelda: Breath of the Wild — Switch/Wii U — 32.85 million
Super Smash Bros. Ultimate — Switch — 32.44 million
New Super Mario Bros. — DS — 30.80 million
New Super Mario Bros. Wii — Wii — 30.32 million
Duck Hunt — NES — 28.31 million
Wii Play — Wii — 28.02 million
Super Mario Odyssey — Switch — 26.95 million
Super Mario World — SNES/GBA — 26.30 million
Pokémon Sword and Shield — Switch — 26.02 million
New Super Mario Bros. U — Wii U/Switch — 25.59 million
Pokémon Sun & Moon — 3DS — 25.09 million
Nintendogs — DS — 23.96 million
Super Mario Bros. 3 — NES/GBA — 23.71 million
Mario Kart DS — DS — 23.60 million
Super Mario 64 — N64/DS — 22.97 million
Wii Fit — Wii — 22.67 million
Pokémon Scarlet and Violet — Switch — 22.10 million
Wii Fit Plus — Wii — 21.13 million
Super Mario Party — Switch — 19.66 million
The Legend of Zelda: Tears of the Kingdom — Switch — 19.50 million