Sonic Rivals 2 adds Knockout brawl mode

If Sonic doesn't end up in Super Smash Bros later this year, it looks like you'll have to resort to the PSP-exclusive Sonic Riders 2 for some hedgehog-on-hedgehog action fighting.

Also in the upcoming Sonic Rivals sequel is the ability to play multiplayer with just one UMD, a feature that we love to see in PSP games. Now with this added battle mode and Game Sharing, it looks like Rivals 2 will greatly expand upon the previous game's offerings.

This article was originally published on Joystiq.