SEGA on Sonic's home, where Mighty the Armadillo is, and how humans got into Sonic's universe

The following comes from head of Sonic Team Takashi Iizuka and art director Kazuyuki Hoshino...

GI: Does Sonic live in Green Hill Zone, or does he just visit there often?

Takashi Iizuka: He does not live in the Green Hill Zone, he just enjoys running around it. He visits often.

GI: Does he live in any particular Zone?

Iizuka: Sonic does not have a house. He's just constantly on the move and enjoying wherever life takes him.

GI: Has anybody noticed that Mighty the Armadillo is missing?

Iizuka: Mighty is a part of the Classic world and the Classic group of characters, and some of the Chaotix did get interpreted for the Modern vision of the games. However, Mighty still exists in the Classic world, so maybe we'll see him in the future in some Classic iteration.

GI: It used to be that Eggman was the sole human. Starting with Sonic Adventure, we're seeing more and more humans show up in the stories. Where are they all coming from?

Iizuka: The world that Sonic lives in and the world the humans live in are separate worlds. But, some of the canon games do have Sonic and humans together, and part of that is based on what world is being portrayed when the game is developed. There are kind of different worlds that do exist and sometimes there's some crossover.