Add this Boss Expansion: Dr. Eggman to your Sonic the Hedgehog: Battle Racers collection, featuring a pre-painted miniature of Dr. Eggman, who you can use as your new favorite Racer or as a Boss you must defeat. This expansion also comes with new Boss Cards, plus an additional set of Tracks for The Green Hill Zone! Combine the Green Hill Zone Tracks into your game to create exciting races with an ever-changing variety of obstacles and challenges!