A (cyan) Chaos Emerald is discovered in a stadium that is set to be demolished. Sonic and the others come running for it without a moment's delay, but of course, Eggman arrives there as well and takes the emerald for himself, staring the group down. It is then when Chuck proposes a fair and square baseball match, with Eggman and Sonic's team commencing a competition for the Chaos Emerald. (thetvdb.com)