Earth-72696, also known as the Vultroverse, is the main reality in which Vultro the Fox lives. Unless otherwise specified, it is the universe in which every single article on this Wiki exists. It is almost exactly the same as the reality of the Sonic the Hedgehog series, and as such has many of the same characters and canon.
As a general rule, the use of canon characters is to be avoided, as to maintain as much canon consistency as possible.