Welcome to WatchMojo, and today we'€™re counting down our picks for the Top 10 Most Powerful Aliens in Ben 10. For this list, we'll be looking at the aliens from the '€œBen 10'€ franchise who have demonstrated powerful abilities and performed incredible feats. We'll be considering the abilities of Omnitrix aliens, their respective races, as well as individual aliens not in the Omnitrix.