10
ben got his aliens from his watch
10
ben could turn into about 20 because they got new aliens
63 aliens.
There are 1,000,095 roughly. But he only locks 32 in all
10 aliens.
52
The Omnitrix (the watch-like device he uses to transform into an alien) has 10 aliens at time. But it happened that Ben managed to "unlock" more aliens by collecting their DNA.
ben first has 10 aliens then collects Cannonbolt then Wildvine then Ditto then Upchuck then Eye Guy then Way Big.But there are plenty more to come.
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about the omutrix and got a new o matrix its not ben 10 alien force or the ben 10 watch it is a differtint omutrix that t infinadi aliens
Ben 10 has more than ten aliens while protecting the earth.