Sonicteam has posted an updated Sonic Battle website.
It seems that Emerl (the new robot character) is related to the plot, and is capable of earning the other character’s attacks through experience points.
The website also features information on Sonic’s moves. It seems that the ring-toss from the ill-fated Sonic Xtreme has made an appearance.
There are also some icons and wallpapers to download.
Source: Sonicteam.com