Benjamin "Ben" Kirby Tennyson was an average 10-year-old kid, until he found the Omnitrix; an exceedingly strong and powerful watch-like device that allowed him to turn into ten different alien species. Though initially immature and clumsy, he grew as a true hero.
His usual clothes consisted of a black-striped, white T-shirt with short sleeves, deep green cargo pants, and black and white sneakers.
Ben is initially portrayed as a cocky, arrogant, and immature boy who tends to make jokes even when fighting. He easily gets full of himself and enjoys attention. This attitude can sometimes make him look obnoxious or dumb, often resulting in criticisms from Gwen and later Kevin. In Escape Fury, he is more smart & mature than normal.
Powers & Abilities
Ben is the wielder of the Omnitrix (later the Ultimatrix), which gave him the power to modify his own genetic code in order to turn into various alien creatures, literally making him an alien shape-shifter. Traditionally, he could only transform into 10 aliens at the beginning of both the original series and Alien Force, but he later gains additional forms by either unlocking them or by scanning the DNA of aliens he meets. At the end of the original series, his arsenal included twenty aliens, while his current complete list is sixty-three aliens discovered.
Ben was originally a ten-year-old boy, who grew up in Bellwood, and was unpopular and was also bullied often in his school.
However, his life changed the day he went on summer vacation with his grandfather, Max and his cousin, Gwen. A short time after they left Bellwood, Ben went on a walk through the woods in which they were camping, and witnessed the crash of a strange capsule from space. This capsule happened to contain the Omnitrix, an immensely strong and powerful watch-like device, that firmly affixed itself onto Ben's left wrist.
At first scared, Ben soon discovered that using the Omnitrix, he was now able to transform into ten super-powered alien creatures. Unable to remove the Omnitrix, he eventually learned to use the device (though with relative problems) in order to become a superhero. Though he occasionally arrested ordinary criminals, he was quickly led to also fight super-villains, starting with Dr. Animo, Kevin 11, and ultimately, Vilgax, a vicious and evil alien warlord who wanted to get the Omnitrix for himself.
Despite being very immature and occasionally using the Omnitrix for minor selfish purposes, Ben proved to be a valuable wearer for the Omnitrix, defeating Vilgax several times (though mostly due to the help from Gwen and Grandpa Max) and saving people several times.
In Ben 10: Secret of The Omnitrix, during a battle with Dr. Animo, Ben accidentally activated the Omnitrix's self-destruct and rushed off with Gwen and Tetrax to find the Omnitrix's creator. He was joined by Myaxx and later realised the countdown sped up when he transformed. He learned he could be a hero without the Omnitrix and Gwen nearly sacrificed herself to save Ben from some Floraunas. Ben then discovered that the creator of the Omnitrix was really a Galvan named Azmuth. He shut down the self-destruct and accessed Ben a new alien, a massive form named Way Big. He then defeated Vilgax and hurled him into space.
10-year-old Ben appeared in the Ultimate Alien episode The Forge of Creation. He looks different from the original 10-year-old version, as a result of the different drawing style. He now has a face that resembles the current Ben and appears slightly thinner as well. His cargo pants are shaded with a lighter shade of green and his shoes are different along with a skin colour that resembles the present Ben's as well.