Quote Originally Posted by Digital Trends
Super Smash Bros. Ultimate for the Nintendo Switch has smashed its way into the record books, earning the title as the best-selling fighting game of all time.

The title was previously held by Street Fighter II, which sold 15.5 million units after releasing seven unique versions since its original launch in 1991. Super Smash Bros. Ultimate, however, did not spend much time in chasing down the record,

Super Smash Bros. Ultimate holds the distinction as the fastest-selling Nintendo game of all time, with 12.08 million units sold in just three weeks after its release on December 7 last year. According to Nintendo’s half-year financial report, that number stood at 15.71 million copies by September 30, which means that it took less than a year to surpass Street Fighter II.

Super Smash Bros. Ultimate has overtaken Super Mario Odyssey, with 15.38 million copies sold, and The Legend of Zelda: Breath of the Wild, with 14.54 million copies sold, to become the second best-selling game for the Nintendo Switch. The fighting game, however, is way behind Mario Kart 8 Deluxe, which has sold 19.01 million copies as the best-selling title on the console.
Super Smash Bros. Ultimate Now Best-Selling Fighting Game of All Time | Digital Trends