Before anyone knew it, the Nintendo DS changed the spectrum of handheld gaming in a way that no one, not even the Nintendo faithful, thought possible. Despite looking like an odd technological cousin to the Game & Watch hardware, the Nintendo DS took veteran and casual gamers by storm. With the introduction and staying power of the DS Lite, this pocket-sized marvel is still selling: over 70 million units worldwide. More than that, the DS's trademark dual-screen gameplay has yielded titles that will always remain classics. The GamePros are counting the top 31 games that have graced this handheld wonder — and we're looking forward to what the future holds...