Board Thread:General Discussion/@comment-78.251.113.152-20130517204819/@comment-8505655-20130517213413

I doubt it. Generator Rex no longer airing notwithstanding, going EVO is a rather rare occurrence. EVOs are common in a world where any living organism can become one, but the chances of any given organism becoming one are slim.

Also, there is a chance that the Omnitrix could prevent that from happening. The original Omnitrix was known to repair at least some altered and mutated organisms. The Ultimatrix did not have that function, hence why Ben did not have such an option when he was in Rex's world, but the new Omnitrix presumably can.