Unified World

The Unified World is a location that appears in the Sonic the Hedgehog comic series and its spin-offs, and the Mega Man comic series, published by Archie Comics. It is a fusion of Sonic's World and Earth in the year 20XX, the creation of which was brought about by the Maverick Sigma in his attempt to drain them of its life force.

Description
The world contains all of the locales of both Sonic's World and Earth in the year 20XX meshed together and overlapping. Since the world was created during the time Sonic's World was experiencing the Shattered World Crisis, the entire planet was split apart.