- For the version of this rank after the Super Genesis Wave, see Egg Boss. For the Dark Legion rank, see Grandmaster (Dark Legion).
The Dark Egg Legion Grandmasters, formerly known as the Sub-Bosses or Underbosses, are a group that appear in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. They were beings originally employed by Dr. Ivo Robotnik to watch over various territories across Mobius he controlled to enforce his will, and to annihilate opposing forces threatening his empire. After his death, Dr. Eggman employed old and new Sub-Bosses to serve his own dictatorship.
Formerly, Sub-Bosses were known to have been located in various prominent regions across Mobius. All of these Sub-Bosses were subsequently defeated or destroyed by the local resistance, sometimes with help from the Knothole Freedom Fighters.
As of 3237, the Eggman Empire had various Sub-Bosses stationed at Flicky Island, Station Square, the Land of a Million Lights, Southern Tundra, Downunda, and the Mobian Sea. However, due to the decline of Dr. Eggman's sanity as well as the Chaotix's destruction of New Megaopolis's communications center, the various Sub-Bosses went unchecked as Dr. Eggman obsessed over defeating Sonic the Hedgehog, effectively ruling their own personal fiefdoms. After adding the former Dark Legion to his cyborg Mobian armies, Eggman renamed the various groups the "Dark Egg Legion", and most of his Sub-Bosses were renamed "Grandmasters" after the Dark Legion rank.
- Note: From this point, the Grandmasters' history continues from their new lives in the altered timeline.
- In one of his Q&A sections, writer Ian Flynn stated that all active Sub-Bosses (with the exception of the Iron King and Queen) would now be titled "Grandmasters", going off the Dark Egg Legion formula. However, the title Sub-Boss was shown to apply afterwards.
- According to info released in Sonic Universe Volume 5: The Tails Adventure, Grand Battle Kukku XV was originally considered as a candidate for Sub-Boss of the Land of a Million Lights.
- Abandoned story concepts that take place after Sonic's return from space included Jack Rabbit and Croctobot as Sub-Bosses under Eggman in the Great Desert and Downunda, respectively. Gala-Na would also have been a Sub-Boss. A new character named Colonel Mange would have been the leader of the Dingoes and Sub-Boss of Angel Island.
- Sonic the Hedgehog Triple Trouble, "Submersible Rehearsal"
- Tails #1, "Southern Crossover Part I"
- Tails #3, "Southern Crossover Part III"
- Sonic the Hedgehog #58, "Friendly Rouges & Foul Villans"
- Knuckles the Echidna #12, "The Forgotten Tribe Part Three of Three: Journey's End"
- Sonic the Hedgehog #138, "Return to Angel Island Part 1: The Message"
- Sonic the Hedgehog #181, "Energjak: Reborn Chapter One: Rising Evil"
- Sonic the Hedgehog #190, "A Bold New Moebius Part Two: Duality!"
- Sonic the Hedgehog #194, "Sleepless in New Megaopolis"
- Sonic the Hedgehog #184, "Anything"
- Sonic the Hedgehog #214, "Reigning Cats and Dogs Part Two"
- Ian Flynn (17 February 2010). Talkback: Ask Ian Dec 09 Final Answers. BumbleKing Comics. Archived from the original on 2 November 2015.
- Antagonists. Sonic HQ. Archived from the original on 10 October 2015.