Sonic Rivals Tag Mode and King of the Hill detailed

It's pretty hard to describe, this video. While we understand the concepts of "King of the Hill", the video really confuses us as to how it'll all play out in the end. No matter, we're more interested in Tag Mode -- something that seems a natural fit for the Sonic universe. The mode plays exactly as it sounds: you tag an opposing player, giving them the "bomb" and they chase someone else down to tag them. Since Sonic games are always built on speed, we expect that mode to have a little more playability than sitting on the top of a hill. Seriously, Sonic doesn't like standing still. He taps his feet and glares angrily at you.