Nintendo's next edition in the Pokemon series has become an instant success with about 1.6 million copies sold across two days in Japan.
Black & White 2's commercial triumph makes it Japan's third fastest-selling DS game ever, as well as the first game on any system to surpass a million sales this year, according to chart group Enterbrain.
However the game could not outpace its predecessor. The original Black & White remains the DS' fastest-selling game in Japan, surpassing 2.6 million units over two days in September 2010.
Nintendo elected to develop Black & White 2 for the original DS as opposed to its 3DS successor. In Japan, the DS has an install base of about 33 million, with the 3DS on 6.2 million.