When a portal for another dimension appears in Sonic's World. It starts to eat everything that is on it's way, including Sonic and his friends. Then they appear on an island called N. Sanity Island. Sonic and his friends start to investigate the island and they discover that there are two islands near N. Sanity Island. Later, Crash (who's on Wumpa Island) hears a strange sound on N. Sanity Island and travels over there.
A look to all the characters, the abilities, the powers and a description
|Crash Bandicoot||Our favourite bandicoot is a balanced character||Orange Spin||7||7||7||7|
|Sonic the Hedgehog||Sonic is a fast one, but he's low on range||
|Coco Bandicoot||Coco defends very well, but her attacks aren't that strong||Pink Kick||4||10||7||9|
|Miles Tails Prower||Tails can attack from a very large distance, but he can be K.Oed very easy'||Tail Swipe||8||2||8||10|
|Crunch Bandicoot||Crunch is a tough one but he's very slow||Metal Punch||10||7||2||9|
|Knuckles the Echidna||Knuckles is strong but he's slow on defence||Volcanic Dunk||10||3||8||7|
|Amy Rose||Amy is speedy but she's very weak||Tantrum||8||2||9||9|
|Dr. Neo Cortex (Unlocked by beating Amy's Story)||Cortex's gun is very powerful but, he's the slowest of them all||Projectile Blast||10||7||1||10|
|Shadow the Hedgehog (Unlocked by beating Cortex's Story)||Shadow has got an excellent speed and strength but, he's slow on defence and range||Chaos Control||10||4||10||4|
|Nina Cortex (Unlocked by beating Shadow's Story)||Nina has got a great range and a great defence but she's slow on speed and strength||Bionic Punch||4||10||4||10|
Rouge the Bat (Unlocked by beating Nina's Story)
|As well as Crash and N. Gin, Rouge, is a balanced character||Jewel Storm||7||7||7||7|
|N. Gin (Uncloked by beating Rouge's Story)||N. Gin is a balanced character||Rocket Dash||7||7||7||7|
|Jet the Hawk (Unlocked by beating N. Gin's Story)||Jet is a special character, with all his abilities to the max||Basyo Fan Attack||10||10||10||10|
Nitros Oxide (Unlocked by beating Jet's Story)
|Oxide, as well as Jet, is a special character, with all his abilities to the max||Gasmoxian Triple Attack||10||10||10||10|
|Dr. Eggman (Unlocked by beating Jet's Story)||Eggman is a boss, only available in Challenge Mode||Giant Missile Attack||10||10||10||10|
In Story you can trave along the three islands (Wumpa, N. Sanity, Cortex) to make Sonic and his friends get back to their world.
In this mode you play a battle with a handicap for any character. Like can't use Special attack, can't move and more.