Nintendo has announced at their fall press conference (via IGN) that Sonic the Hedgehog, having already put aside 16-bit differences to challenge Mario in the Olympics, has joined the lineup for Smash Bros. Brawl. A new trailer was shown at the event that shows him transforming into Super Sonic. Anyone want to take bets on what his down+B special move is going to be?

Also announced was the inclusion of online cooperative play. While North American Smash Bros. fans might be finding it hard to wait until December 3 to pick up the game, Japanese gamers have it even harder - Nintendo also announced that Brawl isn't hitting Japan until January 24, 2008.

This article was originally published on Joystiq.