Sonic and The Freedom Fighters journey to Robotnik's underground air base in a mission to reprogram the launch data on Robotnik's fleet of Stealth-Bot aircraft. While attempting to reprogram the Stealth-Bot computer system.
While on a mission to the big city to replace Nicole's malfunctioning microchip, Sonic and Sally encounter the Guardian, a mysterious cloaked figure who guards a dormant wizard named Lazar and his computer of evil spells.
After Dulcy exhibits strange behavior, Sally discovers she's going through a "rites of passage" stage of her adolescence. In Dragon tradition, she is drawn to Dragon Lair, a migratory nesting ground, through trance-like visits from her mother.
On a mission to contact the first Freedom Fighters on the King's List, Sonic and the others are forced to travel through a tunnel which carries a "curse" against all intruders.
Santa Claus has made an announcement - he is retiring and has picked the perfect successor - "Robotnikclaus"! Sonic and his sister resolve to persuade Santa to return and set Christmas straight. When the two track down the Santa who made the announcement, they discover he is just a phony robot and the real Santa Claus is being held prisoner.
Sonic and Tails help out an Owl/Chilidog Diner owner, named Bert Whoo, when Robotnik uses his henchbots to try to collect protection money. When the henchbots prove to be no match for Sonic.
Robotnik invents a robot coach -- the "Coachnik", to put S and G through a "Training Camp" to improve their skills. Then Coachnik puts a bomb in Grounder's head as a booby trap for Sonic, and a football game ensues with Grounder's head as the ball.
Robotnik decides to cripple Mobius' three major transit systems: Rail, Air, and Sea in order to fully gain control of the planet. Sonic has to circumnavigate the planet in order to save the day.
Robotnik invents a giant AMNESIA RAY in his booby-trapped PINBALL FORTRESS (based on the Sonic game per Roger Hector) in order to erase the bad memories the Mobius citizens have of him, and make them think he's a great guy.
A female space hunter named Katella, who is capturing animals all over Mobius for a Zoo, teams up with Robotnik and captures Sonic. To Robotnik's great fear, she then plans to marry the eggman!
Sonic plays Cyrano to bring Robotnik Jr. and Breezie together. The problem is, Breezie's crazy about Sonic. So Sonic gets out of the way, but when he does, Junior is captured by Robotnik, and Breezie comes to the rescue, finally falling for him.
When Wes Weasley returns to the Fortress, Coconuts tricks Robotnik into signing an IOU so he can buy thousands of Mobiums worth of magic tricks to use on Sonic. In the end, Sonic goes free, and Robotnik is forced to pay Wes the massive IOU debt.
The Hedgehogs steal historical artifacts of Mobuis from Robotnik before he can pawn them off at an auction.
The Hedgehogs find out that Sonia has inherited a castle. She basks in the idea of having a castle for headquarters.
Robotnik organizes a track meet to lure Sonic into a trap.
While lost in the wastelands of Mobius, Sonic, Manic and Sonia stumble upon an oasis called Lake Valley Resort.
Rumor has it that Queen Aleena's journals are buried in the city of Tashistan. Sonic and his siblings search the city for the scrolls.
Santa Claus has made an announcement - he is retiring and has picked the perfect successor - "Robotnikclaus"! Sonic and his sister resolve to persuade Santa to return and set Christmas straight. When the two track down the Santa who made the announcement, they discover he is just a phony robot and the real Santa Claus is being held prisoner.
When Sally uncovers Robotnik's plan to seed the cloud with toxic rain, they attempt a daring mission to sabotage the dirigible-like craft being transported by land vehicles. Mission fails when Sally, Bunnie and Antoine are captured.
When Robotnik launches a spy-orb that will uncover the Freedom Fighter's Knothole location, Sonic and Robot launch themselves up to the orbiting spy-sphere aboard a home-made rocket powered by Robotnik's discarded booster engine.