Mobius
From Sonic - NeoWiki
According to the Sonic Comic book series, Sonic the Hedgehog lives on a fictional planet known as Mobius. Like planet Earth, Mobius has a cross over between nature and man-kind. When Sonic hit 3-D he has shown he has started protecting humans and starting communicating with them more. Though Sonic lives on Mobius the TV show Sonic X shows Sonic lives on the planet Earth.





