Nintendo touts DS as the top-selling game system in the U.S.  Software sales for Mario, Brain Age, Big Brain Academy, and even Nintendogs also spiked.Nintendo News: Nintendo DS Becomes America's Top-Selling Video Game System    
In a triumph for innovation, the dual-screen Nintendo DS(TM) portable   became America's top-selling video game system of any type in June, according   to independent sales numbers just released by the NPD Group. The introduction   of the new DS Lite version, featuring a smaller profile and more brilliant   display, boosted total sales to nearly 600,000 units, almost double that for   any other game device, and alone represented more than a third of total   industry system purchases for the month.    
    Beyond the unique technical coupling of dual screens, a touch screen, a   microphone and seamless Wi-Fi play, DS popularity also is being propelled by a   unique mix of software that appeals equally to mainstream players and those   new to the category. "New Super Mario Bros.(R)" was the industry's top-selling   game for the second month in a row, with purchases of more than 450,000 units,   while groundbreaking titles "Brain Age(TM): Train Your Brain in Minutes a Day"   and "Big Brain Academy(TM)" combined to sell nearly 350,000 units. In   addition, the unique "Nintendogs(TM)" titles combined to sell more than   100,000 units, 10 months after their introduction.    
    Nintendo(R) Wi-Fi Connection, a wireless gaming network exclusive to   Nintendo DS, also now has achieved participation by 1.7 million discreet users   worldwide in just eight months, an adoption rate far higher than any other   game-play network to date.   There's currently a variety of Wi-Fi games to   choose from including "Metroid Prime Hunters," "Tetris DS," "Animal Crossing:   Wild World" and "Mario Kart DS," with "Star Fox Command DS," "Mario vs. Donkey   Kong 2: March of the Minis" and "Clubhouse Games" launching in the months   ahead.  At 1.7 million people strong, if the Nintendo Wi-Fi Connection   community were a city, it would be the fifth largest in the United States,   larger even than Philadelphia, Phoenix or San Diego.    
    "Nintendo DS is the only game system available a year ago that showed   growth over the same period, and it did so in overwhelming fashion, with a   leap of 426 percent," says George Harrison, Nintendo of America's senior vice   president of marketing and corporate communications. "What we're seeing is   realization of our promise that Nintendo will bring gaming to the masses --   whatever your taste or level of experience, we've got a system and a game for   you."