When Tails gets trapped in the "Warp of Confusion" (an Escher-like world of another dimension) by Robotnik's cousin, Dr. Warpnik, Sonic comes to the rescue and traps Robotnik and his badniks in the warp.
In order to free Sketch Lampoon (a satirical comic book artist) from Robotnik's new high security prison, Sonic allows himself to be captured, then makes a high speed rescue and escape.
Tails and other Mobius citizens are lured into Robotnik's robotic games of chance, and when they lose they're sent to slave labor camps. Sonic rescues Tails and the others by beating the house in games of chance at Robotnik's Casino.
Sonic saves a damsel in distress, and falls in love with her, not knowing she's a robot built by Robotnik. But when she has a chance to trap him, she helps him escape, realizing she has fallen for him.
Sonic and Tails find an underground world of diamonds, but they are held captive there by a miserly Mole-Troll. When Robotnik comes to capture them, he accidently frees them from the Mole-Troll, who teams up with Sonic and Tails to defend his riches.
Sonic outsmarts Coconuts, then stumbles into a Convention of Bounty Hunter Robots where Robotnik puts a price on his head. After Sonic defeats all the Robot Bounty Hunters, Robotnik creates Scratch and Grounder to be his S.S.S.S.S. Squad.
Scratch and Grounder fiddle with Robotnik's Warpinating Warpifier and send Sonic and Tails into the world of a Mobius Fairy Tales book.
Robotnik captures a flute-playing Ninja crane, taps his martial arts knowledge, and transfers it to Scratch and Grounder.
Momma Robotnik forces her son to run for President of Mobius with Wes Weasley as his campaign manager.
Throbbin Screech brings a TV crew to interview Robotnik for "Lifestyles of the Sick and Twisted". Robotnik rampages through the Mobius countryside proving how sick and twisted he is, and Sonic is kept busy doing rescues. Tails decides to take on...
Robotnik has his eyes set upon Queen Aleena's crown jewel, but Sonic, Manic and Sonia plan to retrieve the gem before Robotnik.
Sonic becomes aggravated that maybe their efforts of fighting for freedom seem pointless. Sonia suggests that they go to the Oracle for advice.
As Sonic begins to chow chili dogs for a snack, he finds a message in the sack from his mother urging him to head to Speedster Island.
The Hedgehogs congregate on the Floating Island in their latest effort to find their mother. But Sleet and Dingo also have an interest in this island.
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 Sonic and The Freedom Fighters take out Robotnik's main computer, they're trapped by Swat-Bots in an underground tunnel, only to be rescued by a handsome teenager named Griff. Griff takes them deep beneath the Big City.
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.
Sonic conquers Robotnik's latest evil - a vehicle designated to locate and destroy living tissue matter - during a solo mission to the Badlands. Upon Sonic's return, the Freedom Fighters honor him with a victory party.
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.