For Ben Ten: Heat blast or Diamond Head
For Ben Ten Alien Force: Swampfire
bens best alien is gloop
EDIT BY UNDEADAWE: First, its spelled GOOP. Second, his best is Ultimate Ben.
Ben 10 Aliens: Fourarms
Upgrade
Heatblast
Greymatter
Diamondhead
XLR8
The most powerful alien in Ben 10: Alien Force is Alien X, because he possesses reality-warping powers.
way big in ben 10
It has to be four arms
fatpigo
i think its alien x he can do anything
He is frozen in time to meet the two most powerful beans in the universe.
The alien is based off of a painting by H.R. Giger called Necronom IV. The figure in the painting most closely resembles a human.
Four arms
Yes there will be on Cartoonnetwork.com
The most powerful alien would be ALIEN X!!!
Waybig.
Alien X
i think its alien x he can do anything
man the most powerful alien is actually alien X but since it gets stuck in arguments all the time its waybig
Alien X somepeople argue that it may be Waybig
dooms day
Different people will give different answers to it. I've arranged original 10 alien squad in descending order of their power and usability.1. Humongasour2. Swamp Fire3. Chromastone4. Jet Ray5. Big Chill6. Echo Echo7. Spider Monkey8. Goop9. Brain Storm10. Alien x
in the most quitest place there is
Alien X is not exactly the most power full alien, it belongs to an alien species called SABIONS in this species there are aliens more powerfull than Alien X.
He is frozen in time to meet the two most powerful beans in the universe.
i don't no what episode that is or if this site has it but if u go on www.megavideo.com and search ben 10 alien force most of the episodes r on there so ep 18 will proably b 2