Heroes

• Sonic the Hedgehog (voiced by Jaleel White)^[4] is the main character of the series. Sonic travels the world and works to defend Mobius from the threat of Dr. Robotnik. Just like in the video games, Sonic can move at fast speeds. He has also shown to be quite cunning and deceitful, using various tricks and disguises to get one over his opponents, especially whenever his speed is nullified.
• Miles "Tails" Prower (voiced by Russi Taylor in the unaired pilot and by Christopher Stephen Welch in the main series)^[5] is a two-tailed fox who is Sonic's best friend and sidekick. Sonic found him as a toddler, apparently abandoned because of his multiple tails, which he can use to fly like in the video games. He usually displays child-like intelligence but has shown to have exceptional skills as a mechanic and a pilot like his video game counterpart.

Villains

• Dr. Ivo Robotnik (voiced by Jim Cummings in the unaired pilot and by Long John Baldry in the main series)^[6] is an evil mad scientist and the archenemy of Sonic the Hedgehog, who uses his robots and inventions in order to take over Mobius. His headquarters is a fortress atop Mobius' tallest mountain, where he uses his Robo-Matic Machine to create robots called Badniks to aid him in his plots. While Robotnik is somewhat capable at defeating Sonic and Tails due to his technology, his childish, manic and often egotistical nature greatly overpowers his tyrannical side, always leading to his defeat and humilation by Sonic and/or Tails.
  • Scratch (voiced by Phil Hayes) is a hot-headed chicken-like Badnik. Originally, Dr. Robotnik wanted the Robo-Matic Machine to create a super robot only for it to produce Scratch instead due to a malfunction. Scratch is arrogant, but not very bright, although he does seem to be more intelligent than his usual partner, Grounder.
  • Grounder (voiced by Garry Chalk) is Scratch's younger non-identical twin brother; a dimwitted mole-type Badnik who was created by Dr. Robotnik when he put one of Scratch's tail feathers into the Robo-Matic Machine, and being built differently as the result of Scratch pulling an extra lever. He has tank treads for legs and drills for a nose and hands (though he frequently swaps them for other tools, even actual hands on occasion). He is based on the enemy of the same name from Sonic the Hedgehog 2. A recurring gag involves him expressing desire for a mother.
  • Coconuts (voiced by Ian James Corlett) is a cynical monkey-type Badnik who was created before Scratch and Grounder. At some point, he was demoted to working as Dr. Robotnik's janitor and is often trying to impress him by outdoing Scratch and Grounder in stopping Sonic to no avail. He is shown to be somewhat smarter than Scratch and Grounder and is shown to have his own styled gadgets in his attempts of defeating Sonic. He is based on the enemy of the same name from Sonic the Hedgehog 2.

Other characters

• Breezie (voiced by Venus Terzo) is a beautiful hedgehog-type Badnik created by Dr. Robotnik in a plot to get rid of Sonic. She initially manipulated Sonic into falling in love with her and giving her various gifts, but when she realized that Sonic really did care for her and does not see her as a robot, she developed genuine romantic feelings for him and betrayed and left Dr. Robotnik's services. Breezie later met Robotnik Jr. who later developed a crush on her.
• Momma Robotnik (voiced by Kathleen Barr) is the mother of Dr. Robotnik who is even worse than her son. While kept in an asylum called the Mobius Home for Really Bizarre Mothers as punishment for bad parenting, she tends to escape on occasion and her insanity even scares her son. At the end of most of her appearances, she ends up recaptured and taken back to the home against her will.
• Wes Weasley (voiced by Michael Donovan) is a weasel who works as a door-to-door salesman. He would often sell devices to Dr. Robotnik that would fail because of either Sonic's ingenuity or Scratch and Grounder's incompetence. He frequently alternates between being on Robotnik and Sonic's side, and will switch to another if there is a profit to be made or if something does not lean in his favor.
• Sergeant Doberman (voiced by Phil Hayes) is a Doberman Pinscher who is a retired army sergeant and a known war hero.
• Professor Von Schlemmer (voiced by French Tickner) is a brilliant but eccentric and kooky scientist who is an ally of Sonic and Tails.
• Professor Caninestein (voiced by Gary Chalk) is a highly-intelligent dog scientist that invents gadgets for Sonic to use. Dr. Robotnik once captured him and had him build a time machine in order to steal four Chaos Emeralds in different time periods.
• Robotnik Jr. (voiced by Ian James Corlett) is a diminutive Badnik resembling Robotnik, which the latter initially created to be his son and carry on his legacy when he passes away. Unfortunately, he defects from his creator and sides with Sonic and Tails. Jr. later fell in love with Breezie.
• Mad Mike and Big Griz (voiced by Michael Donovan and French Tickner) are a duo of bears who both go by the name "Da Bears". They are Sonic and Tails' proclaimed biggest fans and despite their low intelligence, display great feats of courage and strength.
• Roxy is a female racoon and the only known employee of Bert's Diner. She has a crush on Sonic, which he returns at the end of her debut episode, Untouchable Sonic.
• Bert Whoo is a green owl. He is the owner of Bert's Diner as well as the Mayor and Sheriff of Mobius Corners. When Robotnik issued an unlawful protection service on Mobius Corners, Bert was one of its few citizens who refused to pay and as a result, ran his own Diner to financially support himself. He is kidnapped by Scratch and Grounder, but is rescued by Sonic and Tails, with some assistance from his employee Roxy.
• Miss Possum (voiced by Louise Vallance) is a possum who became the Sheriff of Tranquil Gulch following the retirement of Sonic. She develops an attraction towards Sonic as he frequently saves her from Scratch and Grounder. She later attends Sonic's birthday in Robotnikland.
• Robot (voiced by Cathy Weseluck) as its name implies, is a small, purple robot invented by Scratch and Grounder with tricycle wheels for mobility and pinchers for hands. Debuting in The Robots Robot, it defects against his creators after being scolded by Robotnik. It later reappears in Hedgehog of the Year saying a word in regards to Sonic.

Pilot

Main episodes

Special

First-run broadcast

The series was shown through syndication in the United States in the fall of 1993 on either weekday afternoons or mornings, depending on the TV station. In the United Kingdom, the series was screened on Channel 4 in 1993 on Sunday mornings at 9:00, but with the "Sonic Says" segments edited out. They were also edited out on The Children's Channel and the UK VHS releases of the series. The weekday morning airings in Australia on Seven Network as part of Agro's Cartoon Connection retained the segments. The cartoon was broadcast in the Republic of Ireland on RTÉ Two from 12 September to December 1994 on weekday afternoons with the segments retained also.^[20]

Rebroadcast

USA Network re-aired the original episodes of the show in the United States from 1994 to 1996 (with an additional Christmas special ordered by Sega to be produced for the Christmas season of 1996 to ride on the coattails with the release of Sonic 3D Blast). The series later returned to syndication as part of the BKN block from 1997 to 1998, and later BKN Kids II from 1999 until 2000. Toon Disney would start broadcasting the series in September 1998, and aired on the channel until 2002.

This TV subsequently aired the first 13 episodes of the show from 2010 to 2011 on their Cookie Jar Toons block. The series was also available on Netflix, and contains 20 episodes. From December 2018-November 2020, reruns of the series began airing on Starz. Later starting on September 3, 2019, the show aired its reruns on the streaming service Pluto TV for the first time.

International airings

In the UK, Pop re-aired the show with the "Sonic Says" segments restored.

In Italy, the show aired on Italia 1.

In Spain, the show aired on Telecinco.

The show was re-aired on in Australia on Saturday mornings on Network Ten as part of Cheez TV from 1993 to 1999, and also aired on Nickelodeon and Disney Channel.

In Brazil, the show aired in January 1996, on Rede Globo on the block TV Colosso. Only the first 22 of 65 episodes aired in Brazilian Portuguese, as well as the Christmas special. The show also aired in Sweden on TV3, in Portugal on SIC, in The Netherlands on RTL4, in Germany on Kabel 1 and RTL II and in 2000 in Arab countries on Spacetoon and Qatar Television.

In September 2003, DIC revealed a new international package consisting of Adventures of Sonic the Hedgehog, Sonic the Hedgehog and the Sonic Christmas Blast special, titled "Totally Sonic!". The package would also feature digitally re-mastered, color-enhanced versions of the shows with new contemporary music, as well as bonus director's cut "Secret Sonic" episodes.^[21][22]

The series also aired on KidsCo, as with many other DIC-produced cartoons.

In the Philippines, it aired on Yey! in 2020 everyday at 2:00 pm.

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