Generator Rex Universe, Ben 10 Wiki

Rex's Universe is where the series Generator Rex takes place. This universe is visited 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 g

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