Just in time for the holiday season of 2005, Nintendo released Mario Kart DS for the Nintendo DS handheld console. As the second portable iteration in the series, it introduced a surprising number of advancements packed into a tiny cartridge: online play, additional characters to unlock, newly-remastered retro courses, and the new mission mode. It was a major step up from the GBA's Mario Kart Super Circuit visually, as well, featuring fully 3D levels and characters. Read on to find out why this game rocked.