The Syndicate planned to use the Chaos Emeralds to ignite all of Mobius' residual Chaos Energy and destroy the planet! After making a deal with his old enemies in the Drakon Empire, Sonic gained the technology needed to prevent this apocalypse. Now with the Syndicate thwarted, Sonic prepares to bring them down- once and for all.

Sonic is the super-fast hero of Mobius, and leads a gang of freedom fighters. He is totally committed to keeping Planet Mobius and its people safe, and he's had enough of Shadow and the Syndicate's genocidal plans…

A dark and sinister hedgehog created from Chaos Energy millennia ago and given shape from Sonic's DNA. Shadow has complete control over Chaos Energy and a psychotic devotion to Robotnik's will, making him a formidable foe. He's already destroyed the Special Zone, and Mobius is next.

Tails is an optimistic young fox who uses his two tails to fly for short periods. He idolises Sonic but has also become a respected hero in his own right - if only Sonic would notice!

Knuckles is the sole guardian of the Floating Island and its powerful Chaos Emeralds. He is willing to do whatever it takes to retrieve the Emeralds from the Syndicate, and is currently hidden on their Death Carrier skycraft…

A laboratory accident long ago turned the kindly Professor Kintobor into the evil Doctor Robotnik! Once a dictator, he is now mute and driven mad by defeat. As Kintobor, he was a friend and mentor to Shadow; as Robotnik, he has been re-united with him…

This sinister group of villains is responsible for reawakening Shadow, using him to gather the Chaos Emeralds. Under the command of the malignant cyborg Dr Zachary and composed of saboteur (and secret Drakon spy) Rouge, the insane Dr Robotnik and the mysterious Vichama, they planned to destroy the world.

8000 years ago, the Drakon Empire - a race of fish who used their advanced intelligence to build robotic bodies to function on land - created Chaos Energy and battled the Echidna's over the Emeralds that contained them. They gave Sonic a Chaos Tap device to stop the Syndicate's plans- though they secretly plan to use this to invade Mobius in the future. The Drakon House of Knowledge has a spy - Rouge - in the Syndicate ranks.

Technology wizard Vector the Crocodile, super-strong Mighty, sneaky Espio the Chameleon and barmy Charmy Bee are Chaotix, former Guardians of the Special Zone. With the Zone destroyed by Shadow, they and the inter-dimensional sentient computer known as the Omni Viewer are stranded on Mobius.

Shorty is a hot-headed squirrel who was trapped in the armour of a Super-Badnik by Robotnik. With his stubborn personality, he was able to rebel and became one of Mobius' premier heroes. He has been freed from his old armour and Tekno has built him a new one that he can put on & take off at will. Now he is the prime suspect in a series of abductions and robberies in the Metropolis Zone…

Tekno is a scientific genius who has a workshop in the Emerald Hill Zone. Her gadgets have saved Sonic's life on many occasions, and she often teams-up with Amy or Shorty. Now she's locked Shorty in her workshop while she tries to find out whether or not he is innocent…

Chief of the Metropolis Zone Police, Bodger is Mobius' finest… in a parallel universe where everything is the opposite. In our world, he's a well-meaning but bumbling figure, rarely seen without his trusty donuts. Can he nab the culprit behind the Cybernik crime-spree before Tekno? Well… no.