When an eclipse from the newly-repaired moon blocks the sun, Station Square faces a risk of panic. Eggman steps in and creates an artificial sunlight orb to provide light through out the city. It seems like Eggman is truly doing some good. Unfortunately, Sonic dosen't think so...

Sonic is supposed to have a date with Amy, but he doesn't show up. So instead, she has a date with Sam Speed. Meanwhile on Eggman's old island base, Bokkun finds one of Prof. Gerald Robotnik's other creations: Emerl & tries to tell him to defeat Sonic. Bokkun opens the door, & he & Emerl walk to the tank. Sonic is trying to get to his date with Amy, but Bokkun stops him to free Eggman, Decoe & Bocoe from jail with the new tank. Can Sonic stop Bokkun & Emerl from freeing Eggman? Or will he be late for his date with Amy?

A tournament at a nearby stadium is being held, with a red Chaos Emerald as the prize. Sonic, Tails, Knuckles, Rouge, Amy, Emerl, and several of their Station Square friends show up to participate in this outstanding event...

The fight tournament draws to a close with Emerl being the winner. However, Emerl starts going beserk after holding the Chaos Emerald and begins to destroy everything in his path. When Amy, Sonic, Knuckles, Tails, and Rouge are unable to stop it, Cream shows up to confront her robotic friend. Will she be able to talk Emerl into ceasing his uncontrollable mayhem, or will she have no choice but to fight and shut him down?

It is discovered that Earth and Mobius are merging. If they join together completely, then time will stop forever. It is decided that Sonic and co. must return home through chaos control. This upsets Chris, who runs off to confront Eggman thinking it is one of his tricks to get rid of Sonic.

Sonic squares off with Dark Oak and his army of Metarex.

After the galaxy is saved, Sonic and his friends recalls memorable moments and anticipate their future.

Shadow invades the Blue Typhoon, trying to kill Cosmo for reasons unknown.

The giant seed finally reaches the final stage of its metamorphosis, and Cosmo steps in the battle to stop it.

A new destructive vision is revealed to Sonic; Chaos starts a devastating flood in Station Square.

A Metarex fleet lead by Scarship sets out to destroy Eggman and Sonic with its might.

Sonic and Eggman agree on a joint effort to retrive the last two Chaos Emeralds hiden inside a Metarex fortress.

Vector comes up with a scheme to play match maker for Cosmo and Tails.

While traveling through space, Dr. Eggman and his forces come across a group of humans battling the armada of Pale Bay Leaf.

When the team discovers that Cosmo's brain is emitting a signal to the Metarex, they plan on trying to eliminate the signal, except that the signal is connected to the part of her brain that translates sounds and sight. While Tails and Cosmo are torn about this, Knuckles pushes for the surgery.

Hawk is kidnapped; Knuckles receives a mysterious message.

Sonic and friends are back on the hunt for Chaos Emeralds.

After the battle with Metarex's Scarship, the Blue Typhoon crashes onto a strange planet.

Sonic and friends come across a barren planet with 500 Chaos Emerald signals coming from it.

Sonic and the others chase after Dark Oak to galactic coordinates 0-0-0, where a thousand-year prophecy will bring their plan to fruition.

After Sonic falls into the watery planet, the gang struggles for a way to rescue him and defeat Dark Oak.

The president's office tries to lure Sonic and the gang into a trap with a Chaos Emerald.

Sonic, the military and Knuckles battle robots in an offensive aimed at destroying Dr. Eggman's base.

Sonic and the gang ambush Egg Fort 2 as it receives the last Chaos Emerald from E-77.

Shadow commits a crime but the warrant that goes out is for Sonic's arrest.