Chimera Sui Generis

Chimera Sui Generis are creatures that live in a place only known as the Null Void Frontier. In Ben 10: Secret of the Omnirtix, the enhanced airing of it showed that it is possible to escape the Null Void Realm by finding a portal in it to the Null Void Frontier. Vilgax, the main villan, is a Chimera Sui Generis. Also, Myaxx, Azmuth's helper with the Omnitrix, is a Chimera Sui Generis. It is not known if all Chimera Sui Generis live in the Null Void Frontier, but it is known that Vilgax was born there.