Sonic frees a prisoner who has been locked at Robotnik's Fortress for 30 years who wants to find his long lost girlfriend which Robotnik also loves.

Robotnik creates a robot fox family when he finds out that Sonic is trying to find Tails a new home to keep him safe.

Robotnik buys new gadgets from an enterprising salesman to help Scratch and Grounder catch Sonic, but winds up regretting his purchases when they keep backfiring.

Robotnik is after the Power Gems from the city of Submerbia and Sonic and Tails are hired to stop him.

Robotnik creates a robot Sonic suit in order to ruin his reputation.

Robotnik fools Captain Rescue into capturing Sonic after the aging superhero lets his guard down, so Tails must convince Rescue to be his old self again in order to save Sonic.

An asteroid is heading for Turtle Town and Robotnik offers to save it, but only if Sonic agrees to play in the Robolympics against him and his robots.

When Sonic saves a female hedgehog named Breezie, he falls in love. Sonic does not know that Breezie is a robot that Dr. Robotnik created to keep Sonic occupied while he floods a village near his fortress.

Sonic and Tails escape underground from Scratch and Grounder, but they are held captive there by a miserly mole named Spelunk.

Grounder accidentally puts a "genius chip" in his head and it makes him so smart that he easily captures Sonic and even takes over Robotnik's operations.

Sonic and Tails infiltrate Robotnik's new Casino Night Zone to stop him and his henchmen from scamming a group of sheep into becoming Robotnik's slaves.

Scratch suffers a blow to the head and believes that he is his favorite television character, Edgar Eagle. Sonic uses this to his advantage in preventing another one of Robotnik's schemes.

Robotnik reprograms a machine created by Von Schlemmer capable of bringing dreams into reality and unleashes a dream monster upon Mobius.

Sonic tries to save a gorilla that is under Robotnik's control, while Coconuts finds the gorilla's lost baby and plots to use it against Sonic.

On the way to stop a train of explosives from arriving at Robotnik's munition factory, Sonic and Tails must deal with a duo of bears named Big Griz and Mad Mike after Scratch and Grounder tell them that Sonic and Tails are the enemies.

Robotnik's obnoxious mother visits her son on her birthday and expects a present. After he fails to destroy a nearby forest as a present, however, she decides to capture Sonic as her own gift.

Sonic must save a family of sloths from Dr. Robotnik's slow-motion ray. But when he himself is slowed down by Scratch and Grounder, Tails and the sloth family must take action.

Tails adopts a squishy creature from another dimension named Goobster, who turns out to be a black hole.

Robotnik and a rival named Brandon Quark try to cooperate in capturing Sonic. However, Sonic tricks them into becoming enemies, and they try to outdo each other.

Robotnik's insane cousin, Dr. Warpnik, captures Tails and lures Sonic into his Zone of Confusion in order to enact revenge on Robotnik for banishing him.

Momma Robotnik visits her son, and after he fails once again, she disowns him and decides to adopt Sonic as her own son in order to capture him.

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 and Tails are captured by Scratch and Grounder, Sonic creates a diversion by telling the duo the story of their creation.

Sonic becomes the sheriff of Tranquil Gulch, in hopes of keeping Robotnik's robots from harassing the locals.

An intergalactic huntress visits Mobius, capturing various citizens and falling in love with Robotnik.