A grand adventure for Sonic, Tails, Knuckles, Daffy Duck, Goofy, Mario and Luigi. They have come together to form a group that would either save the world or doom it forever more. They have many enemies such as the evil Master of Machines Dr Robotnik, the dangerous group known as the ZooCats, an old, retired boxer called Old Knuckles, Zargak the Kill of Kills and much more.