Knuckles is the Guardian of Floating Island and the Chaos Emeralds and is hotheaded and aggressive, but also intelligent and protective, if a little gullible sometimes. Since her first encounter with the Guardian, the treasure hunter Rouge has been itching for another round with the Echidna. Knuckles Guards his Island with fellow Freedom Fighter allies Chaotix, to deal with this Rouge has joined forces with Doctor Eggman and the treasure hunter Nack…

Cream and her Chao companion Cheese are innocent children of Mobius who hate violence and wish that Eggman would stop his evil ways. Cream lives on Flickie’s Island with her Mother and looks up to Amy, a spirited young Hedgehog girl obsessed with Sonic. The prototype G-Mel Unit created by Eggman, known as Gemerl, has been dispatched to Flickie’s Island to test its abilities before it can be used in Eggman’s newest plan…

Shadow’s life was complicated enough until he awoke to find himself a clone. With his life consisting of vague memories of an existence that belongs to another being, Shadow strives to find his purpose in the world. His memories of the destructive Gizoid known as Emerl are quite clear and Shadow longs to put an end to Eggman’s newest general, who has assimilated the fighting data of some of Mobius’s strongest beings…

Shadow, the physical manifestation of good in the world, sacrificed his physical existence to keep the physical manifestation of evil, Chaos, locked within the Master Emerald. Through their time together existing as balanced energies they have come to realise that events on Mobius are about to shape the future of the world and when Nack and Rouge come to attack Floating Island, these two immortal beings sense the future may be now…