"Dr. Eggman and Dr. Wily are evil geniuses who want to conquer their worlds, but have been foiled every time by their blue nemeses! When the power of a Chaos Emerald allows the two to meet, it's game on! It's cross-world chaos as heroes are pit against each other! The Blue Blur and Blue Bomber battle from one world to the other with Eggman and Wily laughing behind the scenes. Who comes out on top? Can the heroes come to an understanding and save the world?" -- p. [4] of cover.