The Society for Observing and Neutralizing Interdimensional Creatures and Xenomorphs is an organization founded by several individuals who's lives Sonic had ruined through largely indirect means. When told of S.O.N.I.C.X.'s name, Sonic the Hedgehog takes great amusement in it.
@NibrocRock I get this energy for some reason and that just sounds hilariously amazing
Titan Tails is a special transformation of Tails, being the result of Tails fusing with every other interdimensional counterpart of himself. In this form, Tails was capable of defeating the all-powerful Master Mogul.
In Sonic X #17, Cheese experiences the effects of Chao stat influence, turning green when running with Sonic and negating that when flying with Cream. This is incorrect, as Run and Fly are not on the same axis of Chao stat influence.
In the Archie Comics, Omega demonstrates to have a crush on Blaze on the basis of her destructive flames. This means Omega suffers from Pyrophilia, the sexual gratification of fire or fire-starting.
Amy Rose seems to be the only character in the main Sonic the Hedgehog cast who can handle a casual punch from Knuckles.
Scott Pilgrim's high school band "Sonic & Knuckles" is a very subtle reference to the 1994 Sega Genesis game Sonic & Knuckles.
Sonic the Hedgehog does not know what hedgehogs look like.
Whisper the Wolf's design began with an in-game custom character in Sonic Forces. From there, she would gradually evolve into her final look.
Tails is very discontent with the fact that Eggman has settled on making Tails Doll rather than a Metal Tails. Moreover, this suggests that he finds Metal Sonic and Knuckles to be particularly cool.
When robots or lackeys fail, Eggman uses his built-in command grab
In 2015, it was revealed that Ian Flynn, Tracey Yardley!, and Ben Bates of Archie Sonic the Hedgehog fame had pitched a line of Super Mario comics to Nintendo. It was ultimately rejected. Allegedly, Mario was also intended to cross over with Sonic and Mega Man in comic form.
Knuckles the Echidna's father dies of pancreatic cancer in the Archie Comics.