Mario Kart Wii
In the week ending May 4, 2008, Mario Kart Wii had sold over a million copies in Japan alone, less than a month since its release in the region. In the UK, Mario Kart Wii was the best-selling video game in the week ending April 12, 2008, having "the eighth biggest opening sales week in UK software history," according to Chart-Track/ELSPA. As of 30 Sep 2019, Mario Kart Wii sold 37.24 million copies, which make it the third best-selling game overall.