Alien Force ben 10
Alien Force is set 5 years after the events of the original series in which Ben has taken off the Omnitrix to have a normal life. But that wouldn't make for a very interesting show so for the sake of the plot, Ben is forced to put it back off to fight an alien invasion (Thank Arceus- wait wrong show fu-). Anyway you'd think it would be easy but with a new show comes new aliens and the old ones don't make many appearances. These new aliens are superior to the old ones in terms of versatility and most of them are essentially fusions of the old ones.
Ben Tennyson
Personality
In those 5 years Ben has matured greatly. He doesn't really care about showing off and only put the Omnitrix back on because Max had gone missing. Though he still has an extremely large ego (whenever he saves the planet he brags to Gwen and Kevin), it does not normally lead to him making careless mistakes like he did in the original series.
Strengths and Abilities
In Ben 10 Returns Ben was able to trick and fend off a DNAlien using the resources on hand.
According to Paradox in Paradox, Ben has an "innate sense of metaphysics" and Ben proves this throughout the episode by being able to figure out that Paradox doesn't have a time machine, "he has a map" of space-time and he was easily able to figure out that there was a parallel version of Paradox the moment he saw him. He was also able to realize that Paradox must stay stuck in time because he's "saved the world dozens of times".
In Paradox Ben proves that he has retained his intuitive thinking as he realized that the Trans-Dimensional Being was Paradox's assisstant Hugo from the way it acted.
In Be-Knighted Ben is revealed to be adept in hand-to-hand combat.
In Darkstar Rising Ben showed good deductive (or inductive if you prefer) reasoning as he was easily able to figure out who Darkstar was from his powers and the fact that Darkstar knew who he was.
In Voided Ben was able to dodge three lasers being fired at him in a very small period of time (1.96 seconds).
In the same episode Ben displayed an excellent memory as he was easily able to recognize a shirtless Dr. Animo, who he hadn't seen for five years and wasn't exactly a threat, as D'void.
In the same episode Ben gets spars with Pierce. He doesn't use his Omnitrix wanting it to be a 'fair' fight and loses. However, Max is surprised by this and Ben practically states that he let Pierce win. This is proof that Ben isn't completely helpeless without the Omnitrix.
In Birds of a Feather Ben was able to overpower an arachnachimp named Simian. He only lost the fight when Simian used his webbing to throw him into the wall. Even then Ben was still able to outsmart Simian.
In Vengeance of Vilgax after trying to hack the Omnitrix, the Omnitrix exlodes while Ben is still attached to it. Ben may rely on his Omnitrix for combat but his human form can still tank a point blank explosion.
Ben's durability is also shown in the next episode, Inferno, where he survives being trampled on by a stampede of Pyroxivors.
In Singlehanded Ben showed that he was strong enough to push a large rock that was as big as himself.
In the same episode Ben was able to outrun three matured Vulpimancers. Unfortunately due to external problems Ben made a noise which drew them to his position. Fortunately due to the same external issues Ben transformed into Big Chill.
In Primus Ben was able to outsmart Vilgax, who obtained the Omnitrix, by turning him into Goop and then shutting of the Anti-Gravity Projector.
In Above and Beyond Ben was able to move fast enough to dodge laser fire and was even was able to disarm Manny Armstrong, a tetramand who should have no trouble dealing with a normal human.
Ben is a natural born leader. When he loses the Omnitrix, Kevin still turns to him for "the plan" despite Ben having no powers.
In the episode Duped Ben was able to move fast enough to make it up a flight of stairs in less than two seconds without Gwen noticing (who was sitting righ next to him).
Also in the same episode Ben showed that he was smarter than he let on when a sensitive copy of himself uses a larger vocabulary and display a greater sense of understanding of what is happening.
According to himself Ben in Fused was able to pull off four all-nighters in a row. In the same episode Ben was able to avoid being attacked by Ra'ad who had just materialized out of thin air. This is especially impressive considering he only had a couple hours sleep.
In Map of Infinity Ben proved to be remarkebly durable for an ordinary human. While he was racing to the Rust Bucket 3 as Cannonbolt he timed out. Unfortunately this meant he landed on the planet that was half frozen and half molten lava. Ben was unfortunate enough to land on the equator which meant when he came to hlf of himself was a sunburn which is remarkable considering he should have died.
Ben's intuitiveness appeared again in Deep when Ben was the first to actually tame some of the aliens and use them to fight the others. In the same episode Ben tanked a radioactive laser blast to the chest and a slab of stone falling on top of him.
In Paradox Ben proves that he has retained his intuitive thinking as he realized that the Trans-Dimensional Being was Paradox's assisstant Hugo from the way it acted.
In Be-Knighted Ben is revealed to be adept in hand-to-hand combat.
In Darkstar Rising Ben showed good deductive (or inductive if you prefer) reasoning as he was easily able to figure out who Darkstar was from his powers and the fact that Darkstar knew who he was.
In Voided Ben was able to dodge three lasers being fired at him in a very small period of time (1.96 seconds).
In the same episode Ben displayed an excellent memory as he was easily able to recognize a shirtless Dr. Animo, who he hadn't seen for five years and wasn't exactly a threat, as D'void.
In the same episode Ben gets spars with Pierce. He doesn't use his Omnitrix wanting it to be a 'fair' fight and loses. However, Max is surprised by this and Ben practically states that he let Pierce win. This is proof that Ben isn't completely helpeless without the Omnitrix.
In Birds of a Feather Ben was able to overpower an arachnachimp named Simian. He only lost the fight when Simian used his webbing to throw him into the wall. Even then Ben was still able to outsmart Simian.
In Vengeance of Vilgax after trying to hack the Omnitrix, the Omnitrix exlodes while Ben is still attached to it. Ben may rely on his Omnitrix for combat but his human form can still tank a point blank explosion.
Ben's durability is also shown in the next episode, Inferno, where he survives being trampled on by a stampede of Pyroxivors.
In Singlehanded Ben showed that he was strong enough to push a large rock that was as big as himself.
In Primus Ben was able to outsmart Vilgax, who obtained the Omnitrix, by turning him into Goop and then shutting of the Anti-Gravity Projector.
In Above and Beyond Ben was able to move fast enough to dodge laser fire and was even was able to disarm Manny Armstrong, a tetramand who should have no trouble dealing with a normal human.
Ben is a natural born leader. When he loses the Omnitrix, Kevin still turns to him for "the plan" despite Ben having no powers.
In the episode Duped Ben was able to move fast enough to make it up a flight of stairs in less than two seconds without Gwen noticing (who was sitting righ next to him).
Also in the same episode Ben showed that he was smarter than he let on when a sensitive copy of himself uses a larger vocabulary and display a greater sense of understanding of what is happening.
According to himself Ben in Fused was able to pull off four all-nighters in a row. In the same episode Ben was able to avoid being attacked by Ra'ad who had just materialized out of thin air. This is especially impressive considering he only had a couple hours sleep.
Ben's intuitiveness appeared again in Deep when Ben was the first to actually tame some of the aliens and use them to fight the others. In the same episode Ben tanked a radioactive laser blast to the chest and a slab of stone falling on top of him.