Adapted from the "Sonic the Hedgehog" video game series and re-edited for a younger audience, this Japanese anime follows the adventures of Sonic and his friends after an explosion transfers them to the human world. There, Sonic is rescued by a 12-year-old boy named Chris, and together they must stop the evil genius Dr. Eggman from getting his hands on the Chaos Emeralds and taking over the world.
Sonic must save Tails from a tailspin.
Tails and the others return to their planet, but Sonic is left behind when Chris turns off the transport machine.
Sonic and his friends try to return to their home planet before time freezes.
Sonic's happy-go-lucky ways start a national trend.
Sonic and his friends find a large, underground kingdom, where they hope to find some allies against Eggman.
A disappearing battleship leads Sonic and company to the realization that Eggman is trying to establish his empire by setting off a chain of volcanic eruptions.
Emerl loses control after winning a chaos emerald.
A plot to capture Eggman leads to a tournament.
Chris and company chase Eggman, who has escaped through the sewers.
Eggman creates chips that control appliances.
Amy gets angry when Sonic forgets about their date.
Sonic tries to prove that Dr. Eggman's "good deeds" are actually nefarious acts.
Sonic's New Year celebration is interrupted by a sudden eclipse of the sun.
A few creatures from Sonic's world crash into Earth.
Gerald Robotnik reveals that his desire to destroy the world comes from a need to avenge the loss of Maria.
Scarlet talks to Schmitz about what happened 50 years ago on Space Colony Ark.
Shadow transports Chris to a secret orbiting colony built by Eggman's grandfather.
Tanaka and Chris use a paddleboat to reach Prison Island; Amy frees Sonic from an underwater jail.
Shadow commits a crime but the warrant that goes out is for Sonic's arrest.
Chris and friends must leave the mansion because of flood damage; Eggman hacks into the government's computer to learn what is planned for him.
A new destructive vision is revealed to Sonic; Chaos starts a devastating flood in Station Square.
Ella and Tanaka sneak Tails out of the Thorndyke mansion in a baby carriage.
Tails and Sonic try to rescue Amy and Lily from Eggman.
As Knuckles blames himself for not being able to guard the Master Emerald, Sonic and Tails take off in the X Tornado to save Amy from the Egg Carrier.
Knuckles has a mysterious vision about a girl named Tikal; Sonic and Tails have their Emeralds stolen.
Chris, Cream and Cheese meet the Eggman's newest fiend.
