The president, although happy Dr. Eggman's base is destroyed, is worried about his upcoming election, so he decides to use Sonic to boost his image.

Dr. Eggman's Egg Fort rises from the ashes of his base to wreak havoc on Sonic and the town.

Sonic and friends search the ocean floor for the fourth Chaos Emerald when Dr. Eggman launches an underwater attack.

Hawk is kidnapped; Knuckles receives a mysterious message.

Sonic, Chris, Tails and the Egg Fort crash-land on the Nature continent.

Sonic and the gang face off against eerie ghosts released by a careless cameraman.

Sonic tries to relax aboard a cruise ship, then learns he will have to save it from an iceberg.

Dr. Eggman provokes Sonic into accepting a challenge by the leader of the S-Team.

Eggman spots Chris and company while they are looking for Cheese.

Sonic and the gang find out that Mr. Thorndike has unknowingly bought a ring containing a Chaos Emerald.

After defeating Eggman's E-88 robot, Sonic goes berserk because of an implanted control device.

Sonic and the gang try to find the last Chaos Emerald before Dr. Eggman; Knuckles decides to help Dr. Eggman as a way to get back to his home.

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