Chaos Titans: Enigmatic entities mentioned by the "first spark." In ancient times, the Chaos Titans "drove back" the darkness that was present. However, their actions unfavorably changed those of the "first spark", including Chip.
Charmy Bee (Light Mobius): The Light Mobius counterpart of Mobius Prime's Charmy Bee. As one of the Chaotix, Charmy was considered by Lara-Su to be one of her adopted uncles. Charmy also trained Lara-Su, helping her gain greater gliding abilities with his expertise in flight.
Doctor Finitevus (Light Mobius): the Light Mobius counterpart of Doctor Finitevus from Prime Zone. At some point in the past, Dimitri came to dislike Finitevus. This was revealed when he expressed shame at having worked with him, an event that was only outclassed by Lien-Da's conspiracy with Mobius' despotic king, Shadow the Hedgehog.
General Raxos: A member of the Zoah and served as their leader within the Twilight Cage. After getting trapped in the Twilight Cage, Raxos and his people were conquered by the Nocturnus Clan, along with the Kron, Voxai, and N'rrgal, the last of whom were the bitter enemies of Raxos' people.
Irving Pavlov: The second cousin of Colin and Julian Kintobor. The latter remembered him for being able to make dogs salivate at the sound of a bell.. Irving Pavlov is likely a throwaway reference to the real life Ivan Pavlov.
Maximillian Acorn (Light Mobius): the Light Mobius counterpart of Mobius Prime's Maximillian Acorn. Before the crisis that resulted in the alteration of the timeline, King Max remained the ruler of Mobius for the first two years of Sonic and Sally's marriage. According to Sally, Sonic didn't mind it and would have been happy if she had given up the crown. This information was not well-known, as some people, such as Julie-Su, thought that Sonic became king just after the wedding.
Mazuri Separatists: a group from Mazuri that are apparently opposed to King Sonic's rule. Little is known about this organization, except that they are apparently a big enough threat for Knuckles, Julie-Su, Mace, and Vector to go and attempt peace negotiations with the group, specifically with one Mazuri known as "Bill".
Mighty the Armadillo (Light Mobius): the Light Mobius counterpart of Mobius Prime's Mighty the Armadillo, and a member of the Chaotix. Along with his teammates, Mighty was one of Lara-Su's trainers, helping her develop her physical strength alongside Vector. Lara-Su also considered him to be one of her honorary uncles.
Min and Mum: a pair of tiny robot minions on Captain Whisker's pirate crew who accompany Whisker. Alongside Captain Whisker, Min and Mum have plagued Blaze's world in the Sol Zone. Min and Mum's names are a play on the word "minimum."
E-116 Rho: The seventeenth unit in the E-100 Series line, created by Dr. Ivo "Eggman" Robotnik. E-116 Rho was created sometime between 3236 and 3237, possibly during or after Dr. Eggman's campaign on harnessing the power of Chaos. Apparently, it was found by E-102 Gamma upon his return to Yurashia at the ocean shores. Rho was then destroyed.
E-118 Tau: The nineteenth unit in the E-100 Series line, created by Dr. Ivo "Eggman" Robotnik. E-118 Tau was created sometime between 3236 and 3237, possibly during or after Dr. Eggman's campaign on harnessing the power of Chaos. Apparently, Tau was ambushed by E-102 Gamma at the Dragon Kingdom at Yurashia, to which it was later destroyed by Gamma.
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.
Captain Hero: A historic superhero on Seaside Island who once fought Admiral Doom. While the outcome of their battle is unknown, the facts from it would be used as study material for students in Evil Science classes.
Crybot: A robot created by Dr. Eggman and is regarded as one of the lamest creations the doctor has come up with. As an Eggman robot, Crybot is able to receive power remotely from Eggman's lair.Team Sonic has shown some familiarity with Crybot, though the nature of their relationship is unknown.
Doctor Eggman (Morpho's dimension): Dr. Eggman's counterpart from a parallel dimension. At some point, Eggman created a shapeshifting robot named Morpho. However, he eventually had an accident that caused his entire dimension to blow up. Whether or not Eggman survived this is unknown.
Eggman (Doctor Eggman's father): The father of the world-renowned supervillain Dr. Eggman, who was seemingly named after him. Not much is known about Eggman, although his son made some desperate attempts in the past to earn his approval and according to him, Eggman was a very oppressive man.
Gigglesnorts: An improve troupe that Dr. Eggman was once a member of. Exercises they would play included "Zip, Zap or Zip" to practice how to think fast.
Lamebot: A robot created by Dr. Eggman and is considered one of the lamest creations the doctor has come up with (hence its name).Team Sonic has shown some familiarity with Lamebot, though the nature of their relationship is unknown.
Mathbot: A robot created by Dr. Eggman and is viewed as one of the lamest creations the doctor has come up with.Team Sonic has shown some familiarity with Mathbot, though the nature of their relationship is unknown.
Eurytheus: The former ruler of the city of Arcos in ancient Greece. In ancient Greece, Eurytheus tasked Hercules with the Twelve Labors (secretly thirteen), which Hercules was to complete in order to enter Mount Olympus. Eurytheus is based on Eurystheus, a king spoken of in folk etymology.
Hydra: A monster from ancient Greece. During his quest to complete the Twelve Labors given to him by Eurytheus, Hercules would battle the Hydra as a part of these tasks.
Lady Agitha: an aristocrat who once attended the debutante ball.
Lord Ambrey: an aristocrat who once attended the debutante ball.
Miffy Squinkington: a female Mobian. While attending an event organized by Robotnik, a woman who was with Bartleby noticed Miffy and questioned why the doctor would have invited her.
Mobian Megawhales: a species of whale. Not much is known of this animal, although the Royal Hedgehog Crest compares the Sand Snakes of Hamarapi to Mobian Megawhales in size. Given their namesake, the species is most likely a type of large whale.
Mobian Muskrats a species of rodents native to Mobius. According to Sleet, Mobian Muskrats are extremely stupid.
Miss Mordue: a human who works as the Thorndyke family's cook at their summer cottage. In the present day, it is implied that, like all the other inhabitants of her town, she was possessed by a ghost during King Boom Boo's stay in town.
↑Ian Flynn on Twitter. Twitter (9 May 2017). Retrieved on 24 June 2017. “PC the Unicorn: Though, can you please answer this one question. Where the heck was Amy at in 30 years later? / Ian Flynn: Adventuring through time via Time Stones, being awesome. #LostHedgehogTales #spoilers”