Thread:Trigger009/@comment-24014422-20170720101738/@comment-24922135-20170720111905

We only say with certainty that the Omnitrix has 11 aliens in it because that is all we know. I assume it has more, you assume it has more, but can we prove there are more? No. We can't. Therefore it states that there are 11 and will be updated when we know more.

The Omnitrix never needed to scan new aliens to unlock them. Cannonbolt, Ditto, Eye Guy, Lodestar, and Rath to name just five were unlocked by random chance. Gax was also unlocked randomly by Ben messing with the Omnitrix, albeit with the intention of trying to get an 11th alien, and the new alien was unlocked during the Omnitrix recalibration.