White trix.png This article belongs to Rex's Universe within the Classic Continuity

Rex's Universe is a parallel universe where the series Generator Rex takes place. This universe is visited by Ben in the special Ben 10/Generator Rex: Heroes United.


The "Nanite Event" spread microscopic machines called nanites across the world, and nanites are present in nearly every living being. When a person, animal, or plant's nanites spontaneously activate, the victim is mutated into a being known as an "Exponentially Variegated Organism," or E.V.O. for short, becoming monstrous and typically losing any sanity and going on a violent rampage.

The EVO threat is controlled by an organization known as Providence. EVOs, Providence, and other places like the Bug Jar are present here and not the universe of Ben. In this universe, alien contact has not been established and the idea of aliens is seen, at least by Rex, as something ridiculous.


Notable Inhabitants

Notable Visitors


  • Generator Rex was originally intended to take place in the same universe as Ben 10, but that did not come to pass due to both series having different toy licenses.[1][2]


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