What comsole are you using? Check wikipedia for a list of aliens you can get (search Ben 10 alien force video game). Get aliens by finishing levels.
chromastone,jetray,goop,echoecho,brainstorm,humungsesaur,swampfire,bigchill spidermonkey and alienx
here is all the codes to ben 10 alien force alien attack codes : swampfire - kmah goop - nnrs jetray - aico echoecho - mthn humungousaur - bx10 brainstorm - aeai bigchill - rkkh chromastone - aoko spidermonkey -uaio alienx - oiaa
answers so far chromastone=AOKO humungsaur=WRES spidermonkey=UAIO brainstorm=AEAI echoecho=MTHN if you have any more update info from ben10toys.net jet ray = AICO
There is swampfire, goop, jetray, echo echo, humongousaur, brainstorm, big chill, chromastone, spidermonkey, and alien x.
Big Chill, Goop, Humungasuar, Spidermonkey, Swampfire, Echo Echo, Jetray, Brainstorm, Chromastone, Alien X.
yes they are swampfire,bigchill,humungasaur,jetray,spidermonkey,goop,brainstorm,croamastone,echoecho and alien x
Ben 10 Aliens Wildmutt Fourarms Graymatter XLR8 Upgrade Dimondhead Ripjaws Stinkfly Ghostfreak Heatblast Goop Swampfire Chromastone Bigchill Humungousour Brainstorm Jetray Spidermonkey Echoecho AlienX
Swampfire, Echo Echo, Humungosaur, Big Chill, Chromastone, Brainstorm, Jetray, Spidermonkey, Alien X and Goop
swampfire,humongosaur,jetray,goop,bigchill,alienX,echo-echo,spidermonkey,chromastone, & brainstorm.
Big Chill, Chromastone, humongosaur, Diamondhead, Brainstorm, Jetray, Spidermonkey, Alien X, Swampfire, Echo Echo, Goop, Lodestar and Rath.
* Humongousaur * Echo Echo * Swampfire * Big Chill * Brainstorm * Chromastone * Jetray * Spidermonkey * Goop * Alien X
humungasore waybig cromistone goop spidermonkey echoecho bigchill swampfire alien-x brainstorm