Sonic Underground
Robotnik blackmails Cyrus by kidnapping his father and holding him hostage.
Robotnik blackmails Cyrus by kidnapping his father and holding him hostage.
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Robotnik invents a ray gun that transports Sonic, Tails, and Robotnik's gang into a storybook.
Robotnik transfers a ninja crane's martial arts knowledge to Scratch and Grounder.
A captain of the Queen's guard is captured before he can reach the secret rendezvous.
Sonic, Manic and Sonia plan to retrieve the gem before Robotnik.
Sonic and the Freedom Fighters travel to Robotnik's lab hoping to decipher his Roboticizer system.
Uncle Chuck finds himself increasingly at risk operating as a spy in Robotropolis.
Antoine is appointed king of a cannibal biker gang.
Robotnik lures Sonic into a round-the-planet vehicle race by threatening an orphanage.
Robotnik takes over a local amusement park called Mobiusland and changes the name to Robotnikland.
Robotnik shrinks Sonic and Tails with a shrink ray and puts them into his terrarium.
Sonic gets stuck with the job of baby-sitting three rambunctious baby groundhogs.
The Badniks go back to the Mesozoic Era and steal the Emerald of Life; Robotnik kills his Dumbniks.
Robotnik orders Scratch and Grounder to drill for a rare mineral in a tropical mountain.
Dr. Robotnik invents a Super Stopper-Zapper that he tries to use to petrify Sonic.
Robotnik's design for a super-genius chip is stolen by Hacker the Mole.
Robotnik constructs a robot replica to ruin Sonic's reputation.
Sonic joins up with a group of Dr. Robotnik's rejects and helps them understand their strengths.
The robots rip open a door to an alternate dimension, and a blob creature falls into Tails' hands.
Sonic suspects Robotnik when he wakes up and finds his shoes gone.
Grounder makes a bet with Scratch that he can catch Sonic first.
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