List of unseen content in TV and comics

This is a list of unseen characters, locations, objects, and other content in Sonic the Hedgehog series outside of the games.

Characters

 * Abraham Acorn: The seventh king of the Kingdom of Acorn and a member of the House of Acorn.
 * Abraham Tower (Dark Mobius): An alternate version of Abraham Tower from Dark Mobius and the commander of Guardian Units of the Nation.
 * Amy Rose (Light Mobius): The Light Mobius counterpart of Mobius Prime's Amy Rose. At some point in her life, Amy would be adventuring through time using Time Stones.
 * Angel-La: The mother of Edmund and Dimitri, and the wife of Byron. Nothing much is known about her, except the fact that the Floating Island was renamed to Angel Island after her name in 3236. In Dimitri's data file in Sonic the Hedgehog issue 105, she was listed as Cara-Lyn, which was then retconned in Sonic the Hedgehog #118 to her original name, Angel-La.
 * Angela Hopkins: An Overlander and a member of the House of Ivo. She was the second wife of Colin Kintobor, the daughter of Lady Agnes Hopkins and the mother of Hope Kintobor.
 * Anti-Penelope Platypus: The Moebius counterpart of Penelope Platypus. She was briefly in a relationship with Anti-Sonic, but unlike Anti-Bunnie Rabbot, she did not join the Anti-Freedom Fighters in search of vengeance. Anti-Bunnie broke up with Scourge after she learned the infidelity with Anti-Penelope.
 * Anti-Rob O' the Hedge: The Anti-Mobius counterpart of Mobius Prime's Rob O' the Hedge, cousin of Rosy the Rascal (Amy Rose's evil counterpart). Little is known about him, except that (according to Scourge the Hedgehog), his brother killed him.
 * Antoine D'Coolette (Light Mobius): The Light Mobius counterpart of Mobius Prime's Antoine D'Coolette. He is the father of Jacques D'Coolette and Belle D'Coolette.

Characters

 * Avatar: A Resistance soldier and an old acquaintance of Sonic the Hedgehog.

Characters

 * Admiral Doom: A historic supervillain on Seaside Island who once fought Captain Hero. While the outcome of their battle is unknown, the facts from it would be used as study material for students in Evil Science classes.
 * Ant Bot: A mass-produced robot model created by Dr. Eggman that were planed to attack Sonic and Amy at a picnic.

Characters

 * Artificial Chaos (Sonic X): A subject mentioned in the anime series.