it is not known if there is an ultimate alien yet.
THE best alien of ben-10 ultimate alien is alien x.
i dont know figure it out urself You Have to buy the Omnitrix Hero Collection to unlock Alien X.
Humungousaur,Way Big and XLR8 oh i fergot Alien X! No, Ultimate Ben is the strongest.
man the most powerful alien is actually alien X but since it gets stuck in arguments all the time its waybig
its either Ultimate Humoungousaur or Ultimate XLR8. EDIT BY UNDEADAWE: XLR8 cant go ultimate, lol. Anyways, Ultimate Ben is the best, fact, not opinion.
No
NO
"The Ultimate Enemy Part 2" is the Final episode of Ben 10 Ultimate Alien.
cant anwser dont know
maybe it'll be ultimate way big but right now it's ultimate humongousaur
You don't, you automatically go ultimate in some boss and some regular battles.
yes Ben can turn into Xlr8 in ultimate alien tv show