
Sonic Underground
Sonia discovers that the watch she received from her friend is actually a monitoring device for the Robotnik Intelligence Agency.

Sonia discovers that the watch she received from her friend is actually a monitoring device for the Robotnik Intelligence Agency.

A captain of the Queen's guard is captured before he can reach the secret rendezvous where he was to meet Queen Aleena.

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.

When Scratch and Grounder use Robotnik's new Slo-Mo Ray Gun to capture Sonic, Tails rescues him by reversing the gun and turning it on a tribe of friendly Tree Sloth People who become a high speed commando strike force against Robotnik.

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.

After Sonic is almost sucked inside the Void, he finds a huge Ring which Sally believes is an ancient relic but it turns out to be trick of the Sorcerer, Nagus. Sally and Bunnie are drawn inside the Void and when Sonic comes to rescue them, Nagus pretends to be the King so Sonic will use his speed to transport him outside.

Robotnik installs a new "obedience microchip" in Scratch and Grounder and orders them to drill for a rare mineral in a tropical mountain. With his Freezomatic machine, Robotnik covers the mountain in ice and runs a Hermit out of his home.

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.

Rumor has it that Queen Aleena's journals are buried in the city of Tashistan. Sonic and his siblings search the city for the scrolls.

The Hedgehogs steal historical artifacts of Mobuis from Robotnik before he can pawn them off at an auction.

Robotnik announces that he will marry Queen Aleena in a plot to become the king of Mobius.

Robotnik organizes a track meet to lure Sonic into a trap.

A captain of the Queen's guard is captured before he can reach the secret rendezvous where he was to meet Queen Aleena.

When S and G rocket to outerspace to mine a radioactive mineral from asteroids, Sonic and Tails stow away. Through a blunder by the robots, all are stranded in space, and Robotnik tries to blow all of them out of the stars.

The sinister Robotnik blackmails Cyrus, an old friend of Sonic's, by holding his father hostage.

Sonia discovers that the watch she received from her friend is actually a monitoring device for the Robotnik Intelligence Agency.

A homecoming is interrupted for Sonic, Sonia and Manic when Sleet and Dingo arrive to collect back taxes after returning to their birthplace.

A captain of the Queen's guard is captured before he can reach the secret rendezvous where he was to meet Queen Aleena.