XLR8
All aliens
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.
forarms,sti
Because his name is Ben Tennyson and he can transform into 10 different aliens.But now he can turn into like many more aliens, about 1 million but only about 50 are mentioned in the show. The Ultimatrix and omnitrix scan a foreign DNA that is not in the Codon Stream therefore saving it and using it for future transformations.
Ben 10 is an ordinary boy who goes on a road trip during the summer holidays. He then finds A mysterious device (a watch) Called The Omnitrix, And can turn into 10 aliens. along with his cousin Gwen and their grandfather, defeat evil aliens.
I answered this on the question, "Tell you the order of ben10s aliens?".
ben could turn into about 20 because they got new aliens
ben got his aliens from his watch
Ben 10 would win because generater rex can use different kind of machines but ben 10 can turn into different aliens.
Ben 10 has more than ten aliens while protecting the earth.
are you kidding i AM Ben ten
ben 10 aliens unleashed or ben 10 evolution
10
It is assumed he doesn't, as the new aliens are "fusions" of the aliens from the original series.
Because he has a powerful watch called a Omnitrix which gives him the power to turn into 10 different aliens.
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.
A list all the aliens ben has
10