Sonic, Knuckles, and Tails reunite against a powerful new adversary, Shadow, a mysterious villain with powers unlike anything they have faced before. With their abilities outmatched in every way, Team Sonic must seek out an unlikely alliance in hopes of stopping Shadow and protecting the planet.
After settling in Green Hills, Sonic is eager to prove he has what it takes to be a true hero. His test comes when Dr. Robotnik returns, this time with a new partner, Knuckles, in search for an emerald that has the power to destroy civilizations. Sonic teams up with his own sidekick, Tails, and together they embark on a globe-trotting journey to find the emerald before it falls into the wrong hands.
Sonic's nemesis Dr. Robotnik has been banished from the Land of Darkness by an evil Metal Robotnik. And if that wasn't bad enough, the devious doctor tells Sonic that the Robot Generator has been sabotaged and will blow Planet Freedom to kingdom come. What should possibly make Sonic trust his worst enemy?
Powered with incredible speed, Sonic The Hedgehog embraces his new home on Earth. That is, until Sonic sparks the attention of super-uncool evil genius Dr. Robotnik. Now it’s super-villain vs. super-sonic in an all-out race across the globe to stop Robotnik from using Sonic’s unique power for world domination.
The time has come for Sonic Underground Warriors to take a stand against tyranny. Pick up your sword and choose a side! The right one (Sonic Underground) or the f**king stupid one (the other one).
Sonic's arch nemesis Dr. Robotnik has been banished from the Land of Darkness by an evil Metal Robotnik. The devious doctor tells Sonic that the Robot Generator has been sabotaged and will blow Planet Freedom to kingdom come. But it's not until the President's beautiful daughter Sara turns on the charm that Sonic springs into action.
Follow the adventures of Sonic the Hedgehog, and his sidekick Tails, as they attempt to stop Dr. Robotnik and his array of robots from taking over the planet Mobius.
Sonic Conversion: the Freedom Fighters develop a De-Robotisizer and try it out on Bunnie. Dulcy: After Dulcy exhibits strange behavior, Sally discovers she's going through a rites of passage state of her adolescence. The Void: After Sonic is almost sucked inside the Void, he finds a huge ring which Sally believes is an ancient relic but which turns out to be a trick of Nagus. Spyhog: After Antoine saves Sally's life during a raid, Sonic can't stand his bragging and zips in to see Uncle Chuck, who finds out his bug in Robotnik's hardware is malfunctioning.
Shadow and Rouge go on the ultimate quest to create the next big battle royale game while tangling with Memphis Tennessee. Meanwhile, Sonic has to save a princess over and over again.