Fictional.
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.
Why would they be called OJ's
They are called Scardox Aliens.
A pack of aliens.
No, the title is simply a clever misnomer...of course there are, it's called 'Aliens'.
They are called the Na'vi.
No there are no such things as aliens
They aren't numbered, and in fact, there are more than 10 aliens he can transform into from the original series.
The grey-white faceless aliens are called Pictorians.
xenophobia
Politicians
It is called transform boundaries.An earthquake