"The spotlight's on the guardian of Angel Island, Knuckles the Echinda! Tasked with protecting his floating home and the powerful Master Emerald, Knuckles has encountered the worst of the worst: Rough & Tumble, Neo Metal Sonic, and even Dr. Eggman! With nothing but his powerful fists--and maybe some help from the likes of Sonic the Hedgehog, Miles "Tails" Prower, and Blaze the Cat--Knuckles has beat them all back to protect not just his island, but the whole world!" -- Provided by publisher.