From SEGA: Sonic The Hedgehog, blasts his way onto the Nintendo DS and takes high-speed action gaming to a whole new level...literally! He's the fastest blue hedgehog on this planet and now he's pairing up with royalty - Queen, Blaze the Cat. This dynamic duo is a pair from different dimensions...but it's a match made to save the world! In search of the Sol Emerald, Sonic and Blaze must battle it out in their own worlds but as they do, ripple effects will change the events of the others.