New Super Mario Bros Wii reached 10 million copies sold, Nintendo announced via Twitter. The side-scrolling platformer first launched on Wii in November 2009 and became Japan's fastest-selling game for the console two months later.
Nintendo's return to 2D platforming action in the Mario series was popular for its multiplayer offerings; up to four players could traverse the Mushroom Kingdom's environments together, knocking into one another along the way. The publisher has since returned to Mario-leaping action on Wii U with games like 2012's New Super Mario Bros. U and last year's Super Mario 3D World, the latter listed by Joystiq as one of the ten best titles that launched in 2013. Nintendo shipped over two million copies of Super Mario 3D World as of May.