He is from a fantasy version of our Earth. This has been confirmed in one of the Japanese manuals for the classic games. His planet is supposed to be cartoony and somewhat futuristic compared to our version of Earth, not to be confused with the parallel Earth concept from Sonic X.
Earlier games and comics suggest that Sonic came from a planet known as Mobius, later on in future games was just called "Sonic's World" (Another name for Mobius in SEGA of Americas Sonic Bible from June 1991 is also called Sonic's World), so it can be assumed that Sonic and co. still live on the Planet Mobius with its own government and history.
sonic unleashed
Sonic the hedgehog has no exact nationality.
how do you summon sonic the hedgehog movie
No, at least not in the games. In the cartoon Sonic Underground (which is not canon), he had a brother, Manic the Hedgehog, and a sister, Sonia the Hedgehog.
Sonic the Hedgehog is the name of the official characters and series whereas Sonic Boom the Hedgehog is most likely the name of a fan character.
Sonic the Hedgehog was born on Planet Mobius.
the planet is Mobius!
Planet Mobius
He lives on a fantasy version of our planet Earth that was created by Sonic Team to suit Sonic the Hedgehog.
no way, everybody knows sonic the hedgehog is the fastest thing on the planet!
no sonic unleashed is about sonic turning into a warehog but it is kind of because the planet get broken apart
The anagram of sonic the hedgehog "sonic the hedgehog."
Scourge is the anti-sonic from the planet Moebius, the alternate version of Mobius.
sonic the hedgehog
Sonic the Hedgehog
Sonic the. Hedgehog
Sonic the Hedgehog