Sonic the hedgehog

"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.