On DS, Pokemon HeartGold and SoulSilver have sold an astonishing 8.4 million copies -- 3.78 million in Japan, where the game's been out since September, and 4.62 million outside of Japan in just a few short weeks of availability before the close of the fiscal year. Nintendo's Japan-only Tomodachi Collection sold 3.2 million copies, and Professor Layton and the Diabolical Box moved a respectable 2.43 million copies outside of Japan. Even Style Savvy, which has a somewhat low profile in North America and Europe, sold 1.21 million copies in those territories. As for two perennial bestsellers, Mario Kart DS and New Super Mario Bros. each sold over three million copies outside of Japan in the last fiscal year.
Nintendo's marquee 2009 Wii titles, Wii Sports Resort, Wii Fit Plus and New Super Mario Bros. Wii, sold more than 10 million units each in North America and Europe alone; and worldwide, those titles sold 16.14 million, 12.65 million, and 14.7 million copies, respectively, through the fiscal year. But if you think those are big numbers, think again. Thanks to Wii Sports being bundled with the Wii system outside of Japan, the game now totals 63.46 million units sold. Heck, even Link's Crossbow Training (bundled with the Wii Zapper) broke a million sold in the last fiscal year.
Head past the break for the complete list of million-sellers from Nintendo's fiscal year ending March 31, 2010.
Source [PDF] - Supplementary information about earnings release [Nintendo]