Sonic the Hedgehog


When Dr. Eggman (Robotnik in the US version) holds the president and his daughter hostage, Sonic must comply to the evil scientist's demand of going to Eggmanland to stop Black Eggman and deactivate the city's generator before it reaches critical mass. Little does Sonic know that it's a trap to activate Hyper Metal Sonic, a robot counterpart built by Eggman to destroy our hero. (Source: Anime News Network)
Sonic and Tails travel to Dr. Robotnik's utopian city of Robotropolis to stop the Robot Generator and defeat Metal Robotnik, who has banished Robotnik from his city.
The second episode centers around the conflict between Sonic and Hyper Metal Sonic, Robotnik's greatest creation yet.