The news has been confirmed on the official Smash Bros. site, which contains screenshots as well as a trailer showcasing plenty of Sonic spin-dash action. "The one whose Smash appearance has been most desired dashes in from far away at supersonic speed," the site bafflingly reads.

Along with the revelation came news that the game has been delayed in Japan until January 28, 2008. While there is no explicit word on a change in North America from the game's previously announced December 3 shipment target, the official North American site ominously lists a release date of "TBD."