Sonic outsmarts Coconuts and then stumbles into a convention of bounty hunter robots, where Robotnik puts a price on his head.
Sonic and Tails find an underground world of diamonds, but they are held captive there by a miserly Mole-Troll.
Sonic saves a damsel in distress and falls in love with her, not knowing she's a robot built by Robotnik.
Scratch and Grounder use Robotnik's new slo-mo ray gun to capture Sonic.
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.
In order to free Sketch Lampoon, a satirical comic book artist, from Robotnik's new high-security prison, Sonic allows himself to be captured.
Tails gets trapped in the Warp of Confusion by Robotnik's cousin, Dr. Warpnik.
Sonic and Tails befriend a pair of aliens who crash-land their spaceship on Mobius.
Robotnik's momma escapes from the home for mothers of villains and demands her birthday present.
Coconuts is exiled by Robotnik to a remote jungle, where he uses a giant baby ape to destroy villages.
Outraged by a new hit song written about Sonic, Robotnik outlaws music on Mobius and then takes pop star Catty Carlisle captive.
A fast-talking traveling salesman named Wes Weasley sells Robotnik various hedgehog-catching gadgets, including the Darkenator and the De-Atomizer.
Sonic rescues Lucas, a rival of Robotnik's, from Robotnik's dungeons. But Robotnik will do anything to keep Lucas from finding his lost love, Lucinda.
The leader of a group of biker bears mistakes Scratch and Grounder for Sonic and Tails and teams up with the pair to attack the real Sonic and Tails.
Tails gets a megadose of Robotnik's growth gas and grows quickly to monstrous proportions, eating everything in sight and terrorizing the countryside.
When Sonic decides to find Tails a suitable foster home, Robotnik finds out and creates a robot fox family, who pose as Tails's long-lost parents.
An elderly, out-of-shape, overweight superhero keeps trying to help Sonic battle Dr. Robotnik -- and keeps getting Sonic in more jeopardy.
After an accident, Scratch thinks he's an eagle and on Sonic's side.
Sonic turns detective to solve the mystery of his missing red sneakers.
Tails adopts a cute and fuzzy pet named Walter, who turns out to be a black hole.