Board Thread:General Discussion/@comment-31047156-20170114175420/@comment-6028837-20170114181224

What are you talking about? The watch doesn't have a limit, and doesn't replace a hero when he unlocks a new one. The omnitrix contains the DNA Samples of countless alien lifeforms, billions of aliens in that watch not just ten. The only reason he's called Ben 10 is because he had 10 aliens to start out with.