This is a canon page.
Earth-7642, also called the Crossoververse, is a reality of the multiverse in which many different heroes and characters from a variety of different universes coexist. It is visited by Vultro the Fox on a few occasions.
Planets
Many Sonic the Hedgehog characters also exist in this universe, and are still inhabitants of the planet they call Mobius, later called Sonic's World. These are both actually different names for our Earth, but in the very far future. By our calendar, most events take place in the 141st century.
In the 20th and 21st centuries, Earth was also the home of many comic characters from the Marvel, DC, and other universes, all of which coexist.
The planets of Etheria and Eternia also exist in this universe, which are home to both Masters of the Universe and Princesses of Power characters, respectively. These follow the events of the DC Comics adaption, however, and differ quite significantly from the events of the shows.