hundreds because not only does he turn into many aliens at once he also goes to many different planets and you can see hundreds more
63 aliens.
A list all the aliens ben has
the aliens are:ultimatespidermonkey,ultimate echo echo,armidrilo,ultimate big chill,nrg,ultimate swampfire,waterhazzard,terraspin,waybig,amphibain,ultimate humangusuare
yes, there will be a game called ben 10 ultimate alien: cosmic destruction. The creator said that there will 16 playable aliens, I'm not sure these are it but they might be Ammadrillo,Water Hazard, Amfibian, NRG, Terraspin, and the ultimate aliens
ben 10 aliens unleashed or ben 10 evolution
ben could turn into about 20 because they got new aliens
Yes It is going to be released October 5th 2010, and you can unlock the ultimate forms and go from alien to alien in the game.
I'd say Ultimate Ben, who has the powers of all the aliens. If you mean the original series Ben 10000 then ether Fourarms or a not seen future alien.
Well, if you mean the Ultimate Aliens, they are as listed. Ultimate Humongousaur Ultimate Swampfire Ultimate Spidermonkey Ultimate Echo Echo Ultimate Big Chill Ultimate Cannonbolt Ampfibian Armodrillo Water Hazard Terraspin NRG Nanomech
his alien force aliens and nanomechNo, Alien X doesn't appear in Alien Swarm.
10 aliens.
You cannot get Water Hazard and Terraspin. Those aliens are in the Ultimate Alien series, not the Alien Force series.