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Characters: Ben 10 Omnitrix Aliens

The Omnitrix (Ultimatrix in Ultimate Alien)

Voiced by Yuri Lowenthal

  • Black Box: Ben has no idea how the Omnitrix works at the beginning of the story; the best he can do is turning and pushing the dial. This frequently causes him to take the wrong transformation, turn back to normal at the wrong time or merely make mistakes.
  • Chest Insignia: The Omnitrix's symbol will appear somewhere on the body of every alien it transforms its wearer into. Most commonly in the center of the chest, but it does vary for some.
  • Clingy MacGuffin: The thing is stuck on Ben's wrist. This prevents villains from simply taking it from him. Though by the last season of Alien Force this is no longer true, as Ben knows exactly how to remove the thing whenever he wants. He just doesn't want to.
  • Discard and Draw: Since Ben can only use one transformation at the time, his set of powers will change according to which form he is using.
    • The Omnitrix, due to housing far more potential alien forms than any one user could hope to sort through, generally operates in sets of ten randomly selected (though generally balanced) forms. Though others can be unlocked later, it will default to another set of ten if left inactive for too long, requiring older forms to be re-unlocked.
  • Emerald Power: The Omnitrix's signature color is green, which also happens to be the favorite color of both Azmuth and Ben.
  • Empathic Weapon: Strongly hinted; the Omnitrix is never specifically stated to possess a will of its own, but it does act like it had one occasionally.
  • Flanderization: The Omnitrix's tendency to give Ben the wrong alien started out as only occasional, only to get worse over the course of the Original Series and even worse in Omniverse, where it ends up becoming a surprise when he actually gets the alien he wants. It has reached a point where Ben doesn't even try to select an alien and just push the dial while hoping for the best.
  • Green Eyes: Though this wasn't the case in the original series, from Alien Force onwards, all of Ben's transformations have green eyes, just like Ben himself. This why he wore sunglasses when he infiltrated the Incurseans as Bullfrag.
  • Imported Alien Phlebotinum: It was built by the Galvans and supposed to be delivered to Max Tennyson on Earth but Ben found it, and since his DNA was close enough to Max's, it accepted him.
  • Informed Ability: The Omnitrix used in Omniverse is supposed to be a perfected version of the original Omnitrix, but it has so far yet to display anything the original Omnitrix couldn't do, is more likely to give Ben an alien he doesn't want and has shorter time limit to stay in alien form. On the other hand, it has no cooldown time between transformations, allows him return to human form whenever he wants, and damage taken while in alien form doesn't carry over into human form. While the problems were later vaguely explained by Azmuth as Ben being too rough with it, the device itself still has yet to show any improvement over the original Omnitrix, or even the Ultimatrix.
    • The shorter time limit and lack of cooldown also are something of a Series Continuity Error, seeing how the flashback of 11-years-old Ben have the original Omnitrix work exactly the same way.
  • Loyal Phlebotinum: Well, it can work on someone else technically, but once it has chosen a host, removing it is a difficult prospect at best (without intricate knowledge of its operation, anyway). The Omniverse version is designed to only work for Ben. Unfortunately, this means that any sufficient change to Ben's biometrics by outside sources can render it mostly inoperable.
  • Magic Pants: In the original series and Omniverse, the Omnitrix adapts Ben's clothing to his transformations. This feature was lost in Alien Force and Ultimate Alien, and instead, nanomachines broke his clothes down and stored them until his transformation ended
  • The Mind Is a Plaything of the Body: Certain forms change Ben's personality as well, such as Brainstorm and Grey Matter making him smarter, or him becoming a Boisterous Bruiser as Rath.
  • Multiform Balance: With over 1,000,000 alien forms with varying powers, the Omnitrix could allow its wearer to adapt to any situation imaginable. In theory, anyway.
  • Omniscient Database: The Codon Stream, for the previous models. Since the Codon Stream and Primus have been erased from continuity, the Omniverse-era Omnitrix doesn't rely on the Codon Stream, instead having all of the DNA stored within itself in a computerized form.
  • Running Gag: The Omnitrix turning into the wrong alien. However, without this Ben would only have 10 aliens.
  • Self-Destruct Mechanism: One that can destroy the universe, given it's allowed to charge for a few days. Giving it a duration of less than a minute (30 seconds) makes it just powerful enough to blow a human's arm off.
  • Shapeshifting is the power it grants Ben and the forms available for shifting can escalate upwards forever.
  • Shapeshifter Mode Lock: The Life-Form lock function allows Ben to lock himself into an alien form for an extended period of time. He uses it to infiltrate the Incursean army as Bullfrag.
  • Suddenly Voiced: From Alien Force onward.
  • Super Wrist Gadget: It looks like a techno wristwatch
  • Suspiciously Similar Substitute: The Ultimatrix.
  • Too Spicy for Yog Sothoth: Malware tried to absorb the Omnitrix during the time Ben was eleven. When he destroyed Feedback, Ben, out of rage, let him try to absorb it... and it caused him to explode. He survived, but that's still impressive.
  • Took a Level in Badass / Super Mode: The Ultimate Alien forms as a result of simulating what would happen if that alien went through a million years of war
  • Transformation Trinket: Into dozens of aliens.
  • Troll: If Ben wants Four Arms, he'll get Grey Matter. If he wants Grey Matter, he'll get Ghost Freak. If he wants Ghost Freak, he'll get Cannon Bolt. While sometimes the Omnitrix knows better than Ben, other times the randomness can only be attributed to it being a jerk.
    Ben: Sometimes....I think this thing hates me.
  • Universal Translator: Has one built in.
  • Younger than They Look: Ben's transformations are the same age as him.

    open/close all folders 

    Original Series Aliens 

Introduced in the Original Series

Articguana/Ultimate Articguana (OS-27)

Click here to see Ultimate Articguana as used by Albedo 
Voiced by Tom Kane (Original Series), Eric Bauza (Omniverse)

Articguana's DNA was sampled from a Polar Manzardills, an alien species that is somewhere between a lizard and a fish. They have the ability to breath frozen vapor which can be used as a weapon, provided they aren't out of breath.

Blitzwolfer (Benwolf) (OS-31)

Voiced by Tara Strong (Original Series), Kevin Michael Richardson (Omniverse)

Blitzwolfer's DNA was sampled from a Loboan, a werewolf-like species from the moon Luna Lobo which orbits the planet Anur Transyl. A wooded moon, Luna Lobo's landscape is prowled with a race of cunning wolf-beasts with a thirst of blood. While these feral creatures mostly hunt in packs, it is a lone wolf beast that often proves to be the most savage of all. Loboans have natural strength, speed, agility, and heightened senses that make them the top predator on Luna Lobo. They also have the ability split their mouth into four parts and perform a sonic howl.

Like all the species and planets in the Anur System, the Loboans and Luna Lobo are under the control of the Ectonurites.

  • Dark Is Not Evil: According to Word of God, there are good and evil Loboans, but their social norms are not the same as humans.
  • Lightning Bruiser: He possess a decent amount of superhuman strength, plus a quite impressive natural speed.
  • Line-of-Sight Name: When Kai refers to the alien as Benwolf in Omniverse, Ben immediately claims to have changed the name, but can't think of a replacement name until he spots Wolf Blitzer on TV.
  • Make Me Wanna Shout: His signature ability consist in open his mouth in four mandibles to generate a powerful Sonic Scream.
  • Metamorphosis: Due to (according to Man of Action) the Omnitrix being stuck between "transforming" and "sampling DNA" functions when the DNA was sampled, Ben's first transformation into this form was gradual, with his skin turning blue, fur growing on him and the instinct partially taking over him.
  • Noble Wolf: When Mr. "It's Hero Time" becomes a wolf, than yes.
  • One-Shot Character: He only appeared in one episode of the original series, and didn't appear again until Omniverse. Dialogue from his return episode strongly implies that Ben never used him in the interim.
  • Our Werewolves Are Different: They're aliens from Luna Lobo, a moon orbiting around Anur Transyl. They obviously don't have a human form and don't infect people by biting (though it was initially believed by the characters they did in Benwolf-see Metamorphosis above). And they have the ability to generate a powerful Sonic Howl.
  • Space Jews: In Omniverse, he is renamed after Jewish journalist and news anchor Wolf Blitzer, and his accent sounds vaguely Jewish as well.
  • Suddenly Voiced: Just like for Snare-oh, the alien whose the DNA was sampled from couldn't talk except through growlings. Ben, on the other hand, can express himself just fine.
  • What Could Have Been: Blitzwolfer went through numerous designs before being finalized.

Buzzshock (OS-27)

Voiced by Eric Bauza

Buzzshock was sampled from a Nosedeenian, also known as Megawhatts, from the Nosedeen Quasar.

  • Ascended Extra: Like Articguana, he originally only appeared in Ben 10,000.
  • Me's a Crowd: Can duplicate if he has enough energy, or if he's cut in half.
  • Shock and Awe
  • Suddenly Voiced: Has understandable speech, unlike the other Nosedeenians.
  • Technopath
  • The Trickster: Not Buzzshock himself, but Megawhatts as a species are well-known for constantly wreaking havoc due to their love of pranks and mischievous nature

Cannonbolt/Ultimate Cannonbolt (OS-15, UA-06)

Click here to see Ultimate Cannonbolt 
Voiced by Fred Tatasciore (Original Series), Dee Bradley Baker (Alien Force and Ultimate Alien), David Kaye (Omniverse)

Cannonbolt's DNA was sampled from a Arburian Pelarota, a shelled species widely believed to be extinct after the destruction of their homeworld by a being called the Great One.

Diamondhead (OS-01)

Voiced by Jim Ward (Original Series), Daran Norris (Race Against Time), Dee Bradley Baker (Alien Force, Ultimate Alien), Eric Bauza (Omniverse)

Diamondhead's DNA was sampled from a Petrosapien, a race of green aliens comprised entirely of a diamond-like organic structure from planet Petropia. Petropia is a craggy, geode-like planet where silicon-based beings evolved to build a complex society of separate underground kingdoms. While there are several different gem-based races, from ruby to emerald to sapphire, each with its own distinct abilities and culture, most Petrosapiens now coexist peacefully. The planet is well-known for having been destroyed by Vilgax and later rebuilt by their guardian Sugilite.

Petrosapiens are crystalline beings whose bodies are formed entirely out of opaque gemstones and whose rock-hard physiologies make them all virtually invulnerable to physical attack. While jewel-like in appearance, Petrosapiens are no pretty boys. Their diamond-hard bodies make these fearsome warriors incredibly tough. Shards of the razor-sharp crystals jut out at numerous odd angles from their heads and bodies, discouraging physical contact, and also act as powerful weapons that can turn a car into confetti in a matter of seconds. Combined with their increased strength, Petrosapiens' shredding appendages can be especially devastating. Living prisms, Petrosapiens can refract light and beam-based weaponry, channeling them through their bodies and projecting them back at their source. Petrosapiens are particularly vulnerable to sonic vibrations. While a stereo blast might cause them to splinter, certain ultra-high-pitched sound waves can cause them to shatter - and no glue in this galaxy or the next can put a Petrosapien back together again.

  • Blade Below the Shoulder: Not naturally, but he can shape his hands into ones.
  • Gemstone Assault: This is his signature ability.
  • Glass Cannon: Literally, though in a technical point of view, it's averted; Diamondhead actually is one of Ben's most durable aliens, as his crystal skin is extremely durable and he can regenerate his limbs.
  • Healing Factor
  • Lantern Jaw of Justice: In Omniverse; not as prominent as Alien X's, but it's still present.
  • Nigh-Invulnerability: he is made of diamond-hard crystal, and even if you succeed in damaging him, he can regenerate. The only thing that can damage him permanently is sonic wave.
  • Power Crystal: A living one at that.
  • Shapeshifter Weapon: He has entire control over his physiology, allowing him to shapeshift his arms into blades, project crystal shards and many other uses.
  • Stealth Pun: Diamondhead is durable, but he can crack under enough pressure. He's a Glass Cannon!
  • Suspiciously Similar Substitute: To Chromastone in the season 3 premiere of Alien Force.

Ditto (OS-41)

Voiced by Rob Paulsen

Ditto's DNA was sampled from a Splixson, a race of small humanoids able to create unlimited duplicates of themselves. The clones are all linked telepathically meaning they share thoughts and feelings, including pain.

  • Badass Adorable: An adorable alien that's around the height of a kid who likes praying pranks. However it was used to destroy an army of mutant bugs in its debut episode.
  • Doppelgänger Attack
  • Ensemble Darkhorse: In-universe example; Ben mentions in Omniverse that according to websites, this alien form is a fan-favorite amongst girls, who consider him cute.
  • Expy: Of the Warner Brothers.
    • Flanderization: The Expy side was fairly subtle in the Original Series; in Omniverse, he is redesigned with more animal-like features and acts much more like them, down to having a chase scene based on their gags.
  • Lethal Joke Character
  • Me's a Crowd
  • Overshadowed by Awesome: Echo Echo in Alien Force possesses the same power as Ditto, without the Weaksauce Weakness, and adds a sonic scream to it, making him much more useful than Ditto.
  • Retcon: In the Original Series, his duplication power had a very specific way of working; he split himself in half to duplicate, each clone was independent, they all felt each other's pain, and the death of even one of them would cause all the others to die. They wouldn't transform back into Ben until all of them were close enough to fuse back together, and would be attracted to each other when they get close enough. In Omniverse, his duplication power works similarly to that of Echo Echo, with his clones appearing in a flash of green light, being able to vanish and apparently all vanishing automatically when the original turns back to normal. His weakness was now that "if the original dies they all die".
  • Talking to Himself: In a literal sense.
  • Tunnel King: In Omniverse; doubles as New Powers as the Plot Demands.
  • Weak, but Skilled: compared to other aliens, Ditto is rather weak and lacks any strong power, but this can be balanced by using his ability to be in various places at the same time if you have a good sense of tactics.
  • Weaksauce Weakness: The clones all feel each others' pain. If even a single one of them dies, they all die.
    • This was retconned in Omniverse as "if the original dies, they all die". Even though the Original Series showed the way he duplicated didn't involved any "original", seeing how he literally split himself into two.

Eon (Race Against Time)

See Villains section

Eye Guy (OS-48)

Voiced by Dee Bradley Baker (Original Series), Paul Eiding (Omniverse)

Eye Guy's DNA was sampled from an Opticoid, a reptilian race with 17 eyes across their body. Though none are on their face.

Four Arms (OS-02)

Voiced by Richard McGonagle (Original Series), Dee Bradley Baker (Ultimate Alien), John DiMaggio (Omniverse)

Four Arms' DNA was sampled from a Tetramand, powerful 12 foot tall aliens with four arms and armor plated skin from planet Khoros. Khoros is a dusty and barbaric world where might makes right and survival is a constant struggle. Due to constant conflict, the planet's culture has long devolved, turning from a confederation of thriving city states into a scorched and boundless wasteland. Nomadic tribes ruled by bloodthirsty warlords ceaselessly roam the landscape, seeking out relics of Khoros' past glory, all in hopes of rediscovering the secrets that will gain them advantage over their enemies.

Frankenstrike (Benvicktor) (OS-38)

Voiced by Michael Dorn (Original Series), David Kaye (Omniverse)

Frankenstrike's DNA was sampled from a Transylian, a race of large humanoids who augment themselves with powerful technology from Anur Transyl. They have the appearance of Frankenstein's monster.

Anur Transyl used to be home of two different races, the Transylians and the Vladats. Transylians were the Vladat's main source of food, feeding on their blood. But the Transylians rebelled against the Vladats, and using superior technology that they had developed in secret, they hunted all Vladats on Anur Transyl into extinction and became the dominant species on Anur Transyl. However like the other inhabitants of the Anur Belt, Transylians have become enslaved by the Ectonurites.

  • Ascended Extra: Only made one appearance in the original series, but returned in Omniverse.
  • Creepy Good: In Omniverse.
  • Cyborg: Somehow, his mechanical parts are natural, since the Omnitrix reproduces them.
  • Dark Is Not Evil
  • Expy: Of both Dr. Frankenstein and his monster.
  • Flesh Golem: His Omniverse design looks like his body is stitched together, with the body parts being different colors.
  • Frankenstein's Monster: He is based on one.
  • Frankenstrike Can Breathe In Space
  • Genius Bruiser: though it's not really shown in-story, it was confirmed by Word of God that Transylians possess some amount of Super Intelligence (though not as high as Grey Matter).
    • Flip Flop of God: Derrick Wyatt recently said that Super Intelligence is not a common Transylian trait, and that Frankenstrike doesn't possess it.
      • Which is weird, because Frankenstrike's Omniverse debut has him acting unusually intelligently compared to how Ben normally is.
  • Mad Scientist: or at least the alien the sample was taken from was one.
  • Mighty Glacier: Debatably; Dr Vicktor still displayed the ability to backhand XLR8 and knock him out, but was otherwise this.
  • No Name Given: He was never named on-screen, only being given the name Benvicktor in the credits of Be Afraid of the Dark. He, along with Benwolf (Blitzwolfer) and Benmummy (Snare-Oh) have been renamed in Omniverse, most likely because of how lame their old names were.
  • Progressively Prettier: Inverted. His Omniverse design is much uglier than the original.
  • Shock and Awe: Ben's first, and largely ignored, electrokinetic alien.
  • Shout-Out: To Mary Shelley's Frankenstein.
  • Steam Punk: Apparently, Anur Transyl is like this.
  • Super Reflexes: Dr. Vicktor was able to backhand a speeding XLR8 (and he wasn't even aware of Ben's presence before that).
  • Super Strength
  • Technopath: Frankenstrike wasn't seen doing any of this, but his genetic donor operated several machines (and even a rocket engine) by plugging them into the towers on his back.
  • The Dog Bites Back: According to the species' backstory, the Transylians started out as the Vladats' slaves and power supply, resulting in them eventually rebelling and exterminating the Vladats.

Ghostfreak (OS-04)

Voiced by Steve Blum (Original Series, Omniverse), Jeff Bennett (Alien Force, Ultimate Alien)

Ghostfreak's DNA was sampled from an Ectonurite, a race of incorporeal ghost-like aliens from Anur Phaetos. Though many legends have long spoken of it as the center where galactic chaos springs forth, not much is known about the shadowy world of Anur Phaetos. Some say it is more a dimensional realm than a planet. Lacking individuality, Ectonurites seem to be part of a dark mass consciousness that literally composes the fabric of their domain. Since no voyager has ever returned to tell tales of a visit and there is scant evidence as to the true nature of its existence, Anur Phaetos remains the galaxy’s most dangerous mystery.

It's later revealed the Ectonurite DNA for Ghostfreak was sampled from Zs'Skayr, the Ecto-Lord of Anur Phaetos.

  • And I Must Scream: Unlike other species sampled for the Omnitrix, even the smallest sample of DNA contains an Ectonurite's consciousness. A copy of Zs'Skayr's consciousness was subsequently trapped inside the Omnitrix and fully aware the entire time. His fight with Zombozo showed signs of Zs'Skayr taking over.
  • Badass Boast: To Zombozo in Last Laugh:
    Ben/Ghostfeak: I just figured out there's something I'm even more afraid of than you: (punches Zombozo and turns invisible) losing my family to some goofball emotional vampire. In other words... (punches Zombozo by the nose and turns invisible again) ... you're going down, clown.
  • Chained by Fashion: For his redesign in ''Omniverse''.
  • Combat Tentacles: Omniverse shows that that the tentacles under his second skin are strong enough to lift a bus full of people.
  • Confusion Fu
  • Creepy Good / Dark Is Not Evil: Ben can get very creepy when he turns into Ghostfreak, but he remains a good guy... as long as Zs'Skayr doesn't take over.
  • Cyclops: he has a single eye, which can move on every part of his body.
  • Dangerous Forbidden Technique: Even after regaining the form, Ben was afraid to use it due to the fear of Zs'Skayr taking over. Now that Zs'Skayr is no longer in the Omnitrix, Ghostfreak exists independently from him, so this no longer an issue. However, the fact that the presence of Charmcaster's stone creatures forced the Omnitrix to limit Ben's selection only to Ghostfreak, and Zs'Skayr emerging after Darkstar's ritual was foiled indicates that they might still be connected somehow.
  • Eyes Do Not Belong There: Can move his eye around his body while in his second skin. Without it his eye is stuck in place because his head is a skull.
  • Grand Theft Me: Heroic example. He defeats Darkstar by possessing his body.
    • Before that however, Zs'Skayr existed as Ghostfreak, and his personality slowly overwhelmed Ben's over time the more he used the form.
  • Horrifying the Horror: Ben managed to scare the crap out of Zombozo just by using this form.
  • Intangible Man
  • Informed Ability: The Bandai profile mentions Ectonurites possess some amount of psychic powers. Ben was never seen using those abilities as Ghostfreak. Zs'Skayr, on the other hand...
    • Fridge Brilliance: Ben, inexperienced as he was at the time, likely didn't know about them. Also, Zs'Skayr was only seen using those abilities in his true form, which Ben never used.
  • Mook Horror Show: Famous for delivering one of the greatest examples of this trope in the entire franchise to Zombozo.
  • Name's the Same: Zs'Skayr goes by the same name in-series, but he and Ghostfreak are (sort of) different characters. In Omniverse, the characters begin calling him by his real name.
  • Our Ghosts Are Aliens: They are a species of aliens from a mysterious sector called Anur Phaetos; they are connected through a Hive Mind that can manifest through even the slightest sample of their DNA; and they are Weakened by the Light, though they can wear a second skin to protect them from it, at the cost of weakening most of their powers. Said skin give them their ghost-like appearance, but behind it, they look like creatures with black-and-white tentacles writhing everywhere, an upside-down cyclopean skull and large claws.
    • Omniverse dips closer to the conventional ghost; Ben boasts that, in this form, he is not technically alive and thus immune to Darkstar's Life Drain abilities. Word of God has stated that Ectonurites are alive; however, their concept of "life" is very different from other sapient life forms.
  • Story Breaker Power: In a conflict against a single, powerful opponent, Ghostfreak can immediately end things by just turning invisible, flying up to them, and possessing them.
  • Super-Powered Evil Side: Zs'Skayr started out as this before his Enemy Without. Ben now has complete control over Ghostfreak, as Zs'skayr is no longer inside the Omnitrix, and when he uses the form in "Mystery, Incorporeal" he says that he still feels like himself.
  • Took a Level in Badass: In the original series, Ghostfreak wasn't much good in a fight. He was too frail to do any serious damage, and all Ben could do with him was turn invisible/intangible or try to scare people. In Omniverse, he can share his invisibility with others, he's immune to Life Drain, he knows how to use his possession abilities, and his tentacles can launch out and are strong enough to hold a bus.
  • Vocal Evolution: Steve Blum's performance in Omniverse is much less raspy and villainous-sounding. It fits, because Ben is now in complete control of the form.
  • Weakened by the Light: Though Ghostfreak wears a second skin that protects him from such a weakness. However, he is still vulnerable to fire.

Grey Matter/Ultimate Grey Matter (OS-02)

Click here to see Ultimate Grey Matter as used by Albedo 
Voiced by Richard Steven Horvitz (Original Series), Eric Bauza (Omniverse)

Grey Matter's DNA was sampled from a Galvan, a species consisting of small, incredibly intelligent frog-like beings from Galvan Prime. Despite its diminutive scale, Galvan Prime is one of the most scientifically advanced worlds in the galaxy. Miniature skyscrapers and ultra-fast causeways litter the landscape, leaving little room for nature. First kept as pets and then employed by other species as industrial technicians, spies and saboteurs, Galvans were smart enough to keep the best secrets for themselves, eventually amassing enough knowledge to build a powerful empire of their own. A chaotic world of intrigue and innovation, the coldly technocratic inhabitants of Galvan Prime work tirelessly and consume massive resources to keep an ever-tightening grip over their former masters.

Azmuth, the creator of the Omnitrix, is later revealed to be himself a Galvan.

  • Author Appeal: He is Derrick J. Wyatt's favourite alien. Not only is brought back in Omniverse as a result, but his species a much bigger role than in any previous entry of the franchise.
  • Cephalothorax: Ultimate Grey Matter is a M.O.D.O.K. Expy, so naturally this is in play.
  • Eye Beams: Ultimate Grey Matter can fire beams from his third eye which have the effect of negating Ben's transformations.
  • Gadgeteer Genius: Even at 10 years old, Grey Matter possess enough intelligence to work advanced machines and build highly advanced weapons.
  • Incredible Shrinking Man: Ben goes from whatever size he normally is, to about 6 inches tall.
  • Lethal Joke Character: Compared to most of Ben's other aliens, his powers seems pretty laughable and useless in a fight, but if well-used, he can become extremely useful and deadly. Not to mention his species is considered the closest thing the Ben 10 Universe has of a dominant species in the Galaxy.
  • My Brain Is Big: Ultimate Grey Matter, while being roughly the same size as the normal form, is mostly brain.
  • Overshadowed by Awesome: While Grey Matter's high intelligence and small size were quite useful in the original show, Alien Force introduced Brainstorm, who also possesses high intelligence (though less so than Grey Matter, according to Word of God) and combines it with Shock and Awe and Mind over Matter. Then, Alien Swarm gave us Nanomech, who is even smaller than Grey Matter, can fly and shoot electrical blasts. Possibly to avert the trope, Derrick J. Wyatt established he was smarter than Brainstorm.
  • Shorter Means Smarter
  • The Smart Guy
  • Wall Crawl
  • What Kind of Lame Power Is Heart, Anyway?: At least in Ben's opinion...
    • Heart Is an Awesome Power: He still find uses for him however; Grey Matter's size makes him a fitting alien to escape bigger predators or hide, and his high intellect doesn't seem useless any more when you can use him to build a solar gun out of scraps. An even more extreme example in Ken 10, where Ken uses him to unlock the Master Code of his Omnitrix.

Heatblast (OS-01)

Voiced by Steve Blum (Original Series), Dee Bradley Baker (Ultimate Alien), David Kaye (Omniverse)

Heatblast's DNA was sampled from a Pyronite, a race of magma-based aliens from Pyros. Of all the homeworlds in the galaxy, Pyros is unique in that it is actually a fully functioning sun. Pyros is a wide-open landscape of endless natural wonders: Infernal plumes erupt miles into the atmosphere, and raging rivers of molten lava cut massive swaths across the fire-filled tundra. Magma based, all of its inhabitants are composed of a flame-like energy. Drawing strength and nourishment from an almost limitless power source, this world's inhabitants are in need of little else.

  • Convection Schmonvection: This alien is from, and is in essence, a walking talking sun. Nobody is harmed or complains about the heat from being in close proximity to him. He can even pick things up without burning them, and literally going supernova in one episode does nothing but evaporate the Fountain of Youth.
  • Elemental Powers
  • Flying Firepower: initially not, but in later episodes Ben learned to use his fire abilities to propel himself in the air and fly.
  • Jack of All Stats: He can hit, possesses acceptable durability, flies with limited capabilities and can blast fire.
  • Shout-Out: When his head goes out, his face looks like Iron Man.
  • What Could Have Been: "Inferno" was considered as a name for him. Amusingly, this name was used for the Polish and French dub.
  • Weaksauce Weakness: Subverted. Just pouring or spraying water on him isn't gonna kill him. One episode of the original series even has him swimming in a pool with no detriment, and his flames spark right up again the moment he gets out. Omniverse even has him able to produce enough heat underwater to melt metal.

Ripjaws (OS-03)

Voiced by Fred Tatasciore (Original Series), Dee Bradley Baker (Ultimate Alien), Eric Bauza (Omniverse)

Ripjaws' DNA was sampled from a Piscciss Volann, a race of aquatic fish aliens from Pisciss. The water world of Piscciss is one of extreme danger. Thousands of exotic species live in a vast anarchic ocean of eat or be eaten. While most Pisccians live in schools because of the safety in numbers, there is still little feeling among these cold-blooded kinfolk. A world of strong currents and highly stratified environments, the deeper one dives on Piscciss, the darker and more dangerous it becomes.

While the Volanns are not the biggest fish in the Pisccian sea, they are definitely the most hazardous. A monstrous hybrid of alligator, eel and leech, Volanns are incredible swimmers who are amazingly fast and agile in the water. A Volanns' huge mouth filled with rows of razor-sharp teeth can chomp through almost anything. Their lower jaw unhinges, enabling them to grip large objects with the strength on an industrial-sized vise. Sinewy and covered in slimy scales, Volanns use their claw-tipped fins to fight in a unique "zero gravity" style that makes them masters of aquatic combat. They can dive deep to the ocean’s floor, easily withstanding the crushing pressure while continuing to breathe through their gills. For all their skill in the water, Piscciss Volanns are unable to walk and are basically useless above the waves. Volanns must keep their gills wet or they'll dehydrate rapidly, which can actually result in their drowning on dry land. As members of their species grow older, however, their ability to spend time on dry land increases, making them more amphibious in adulthood.

Snare-oh (Benmummy) (OS-37)

Voiced by Richard Green (Original Series), Kevin Michael Richardson (Omniverse)

Snare-oh's DNA was sampled from a Thep Khufan, an alien species that is comprised entirely of bandage like strips from Anur Khufos. Anur Khufos is a planet rich in Corrodium, a substance known for being extremely radio-active and causing horrible mutations. As such, Thep Khufan had to adapt to this to survive.

Like all species in the Anur System, they are slaves to the Ectonurites.

  • Ascended Extra: Only made two brief appearances in the original series. He's used more often in Omniverse.
  • Combat Tentacles: The bandages that make up his body actually are thin, but very strong tentacles he has complete control over. They can be used to effortlessly lift Diamondhead.
  • Confusion Fu: Needless to say he has a very unorthodox attack pattern.
  • Dark Is Not Evil: Though the alien who provided the sample sure was.
  • Mummy: Its look is based on one, though otherwise it follows almost none of the cliché usually associated with the trope.
  • Forgot About His Powers: In "The Frogs of War, Part One". Ben apparantly hadn't used this form for so long that he'd forgotten what it could do.
  • Healing Factor: Can easily be torn apart and even shredded to bits, and reform nearly instantly.
  • How Do I Shot Web?: Initially, Ben doesn't really know how to use Snare-Oh's powers, and spends a good deal of a fight with the Yenaldooshi (the DNA sample of Blitzwolfer) getting his ass beaten.
  • No Name Given: Like Frankenstrike, he was never named on-screen, only being given the name Benmummy in the credits of The Return. When he returns in Omniverse, his name is still not stated on-screen, but he is listed as Snare-oh in the credits of ''The Frogs of War: Part 1".
  • No Sell: Thep Khufan are completely immune to the horrible mutations corrodium radiations usually cause, allowing them to carry the substance inside their body with no ill side effects. Ben shows this ability as well while in alien form, but it's unclear if it's his aliens' ability or just thanks to the fact he is transforming through the Omnitrix.
  • One-Shot Character: Appeared only in one episode of the original series, although he did make a brief appearance as a Continuity Nod in a later episode. When he returns in Omniverse, his name is still not stated, but the credits for The Frogs of War: Part 1 list him as Snare-oh.
  • Suddenly Voiced: Ben can speak as Snare-oh, despite the fact that the alien he got the DNA sample from is The Voiceless.
  • Zombie Gait: Averted — he's actually one of the more nimble aliens Ben can use.

Stinkfly (OS-02)

Stinkfly's DNA was sampled from a Lepidopterran, a race of winged insect-like aliens from planet Lepidopterra. With its advanced and highly specialized ecosystem, Lepidopterra is a generally peaceful swamp planet whose numerous species live among a fantastic variety of giant plants. Residing in a complex of giant hives each ruled by its own queen, Lepidopterrans are the predominant inhabitants of their planet. Life on this planet is seasonal, and every species does its part to make sure the flora continues to produce its fruit so that all can live together in harmony as they have for countless eons.

  • Beware My Stinger Tail: he has a bee/scorpion-like stinger that is sharp enough to rip through metal.
  • Big Creepy-Crawlies: basically a giant alien fly.
  • Breath Weapon: Shoots slime from his mouth and eyes.
  • Fartillery: When Ben is reduced to a four-year-old, this is Stinkyfly's power.
  • Flight: while he never was Ben's only flyer (Ghostfreak was one as well, and Heatblast later was revealed to be one), this is still the main use Ben had of him most of the time.
  • Glass Cannon: Seriously, just throw some water on this guy's wings and he's through.
  • Weaksauce Weakness: Stinkfly's wings are very vulnerable. Even to water.
  • You Need a Breath Mint: Stated several times by other characters that Stinkfly, well... stinks.

Upchuck (OS-39)

Voiced by Dave Wittenberg (Original Series), Dee Bradley Baker (Alien Force, Ultimate Alien), Eric Bauza (Omniverse)

Upchuck's DNA was sampled from a Gourmand from Peptos XI, a small green species with large appetites. Gourmands have three prehensible tongues, seven acid filled stomachs and diamond hard teeth, allowing them to eat almost anything. Once they feed, they are able to project deadly energy beams from their mouths.

  • Big Eater: Except he can't digest what is normally considered "food", leading to...
    • This Billboard Needs Some Salt: At one point, he drinks an animated "Mr. Smoothie".
      • In the original series, this is quoted as Ben exclaims that Upchuck is a bottomless pit, but just can't eat regular food.
  • Breath Weapon: Upchuck can fire laser beams from his mouth (or as he called them in Upchuck's debut 'exploding loogies'), though it has only been used twice (first against the Forever King in the original series then later on against Chromastone (who had escaped from the Omnitrix) in Alien Force. Though he prefers to fire exploding green energy pellets instead.
  • Extreme Omnivore: He can eat everything... except, ironically, regular food.
    • And by everything, an episode on Omniverse shows that the species as a whole has Plan Omega, which is to eat their entire planet!
  • Glass Cannon: A given he's the size of a woodchuck.
  • Meaningful Name: When he showed off his powers of 'exploding loogies', Ben exclaimed that he had 'Upchuck power', that is to say, acidic vomit.
    • Wanna know why Upchuck's species comes from Peptos XI? Because due to the species enacting Plan Omega—which is to devour their entire planet—they've done this so many times in the past!
  • Voluntary Shape Shifting: Sort of. There are two races of Gourmands; one are called Murks, and resemble Upchuck's design from the original series, and the other are called Perks, resembling Upchuck's design from Alien Force and Ultimate Alien. In "Tummy Trouble", Upchuck displays the ability to switch between the two races. Derrick J. Wyatt stated that he did this because likes both designs of Upchuck, and wanted to be able to use both.
  • What Could Have Been: Several designs were considered for him; two of them ended up re-used for future aliens Spitter and Articguana, and two more became villains in "Ken 10."

Upgrade (OS-04)

Voiced by Tara Strong (Original Series), Yuri Lowenthal (Generator Rex, Omniverse)

Upgrade's DNA was sampled from a Galvanic Mechamorph, a bio-mechanical race. Galvanic Mechamorphs were an accidental creation of the Galvan resulting from an experiment on their moon Galvan B, when they attempt to turn the moon into a planet-sized space station through nanotechnology and a device called the Helix. The experiment was successful, but ended up creating artificial life forms, resulting in the Galvanic Mechamorphs. The Galvan eventually gave up the experiment, and helped the newborn Galvanic Mecamorph to create their own civilization before recognizing them as an independent species.

  • Confusion Fu/Mighty Glacier: He's the latter when he's just Upgrade and the former when....everything else.
  • Cyber Cyclops
  • Eye Beam: though it took Ben time to figure out, Upgrade can, even when not fusing with machines, shoot a plasma beam from his single eye.
  • Fusion Dance / Super Empowering: Ben uses him to do this with Rex in Heroes United.
  • Mechanical Lifeform: he actually is made of very advanced galvan nanotechnology.
  • Robo Speak: Averted, Ben (And Max in the Orginal Series episode Gwen 10) retains his human voice in this form, albeit with some static noises in the background.
  • Technopath: he can take over any machine by fusing with it, upgrading it (hence his name) to incredible level in the process. But it has limits; if the machine is sentient, it can struggle with the possession and get free.

Way Big (Secret of the Omnitrix note )/Ultimate Waybig (UA-52)

Click here to see Ultimate Way Big 
Voiced by Fred Tatasciore (Original Series), Dee Bradley Baker (Alien Force, Ultimate Alien), Eric Bauza (Omniverse)

Way Big's DNA was sampled from a To'kustar, a race of enormous aliens created in cosmic storms. Despite their power they are actually peaceful in nature.

  • Achilles' Heel / Attack Its Weak Point: The movie Destroy All Aliens establishes that Tokustars' head fins are vulnerable to attack. Hit them there and they're paralyzed. It's unclear how long the paralysis lasts, since Ben's transformation ended soon after he was hit.
  • Attack of the 50-Foot Whatever
  • Destructive Saviour: His energy beam as Ultimate Way Big does not automatically shut off if he moves.
  • Disney Death: Was aged to dust by Eon, but restored by Ben 10,000.
  • Expy: Of Ultraman. Right down to the + style energy beam.
  • Just a Stupid Accent: In Omniverse, he speaks with an exaggerated Japanese accent. Considering what he's based on, it makes sense.
  • Kamehame Hadoken
  • Mighty Glacier/Lightning Bruiser: Originally the former, but turned out to be the latter.
  • Negative Space Wedgie: According to the official bio, this is the species' birthplace; To'kustar are born in giant cosmic storms.
  • Our Giants Are Bigger
  • Shout-Out: Has horns like Ultraman Taro but the color scheme of Ultraman Tiga and Ultraman Dyna.
  • Super Speed: Displayed this ability in Ultimate Alien, but it's been retconned as a glitch power in Omnniverse.
  • Weapon of Choice: As Ultimate Way Big.
  • Story Breaker Power: A lot of enemies would be defeated in a matter of seconds if Ben just used this guy (his first appearance had him easily defeat Vilgax), which might explain why he wasn't introduced until the original series' finale and brought back in the season 2 finale of Alien Force. After that, the writers were forced to either rely on Ben carrying the Idiot Ball or the Omnitrix's tendencies to give him the wrong alien to ensure Ben wouldn't use him too often. Way Big also can't be used inside buildings or aboard space ships because he's too big to fit inside them. Ben knows that using Way Big is overkill in normal circumstances.
    • So much so that in Ken 10, Ben didn't use him until Kevin pushed his Berserk Button and harmed his son. Note that this was in the middle of a populated city. Ben was really pissed at Kevin at the time.
  • The Worf Effect: As Ultimate Way Big; he is easily defeated by Diagon to show how dangerous the thing was.
    • A much more humiliating example is when he is defeated by Trumbipulor in Omniverse.
    • In general, sometimes the writers will attempt to go out of their way to avoid his Story Breaker Power status, but at the cost of making Way Big seem much less powerful (as of this writing, he's the only alien form to singlehandedly defeat Vilgax before the Time Skip).

Wildmutt/Ultimate Wildmutt (OS-01, UA-32)

Click here to see Ultimate Wildmutt 

Wildmutt's DNA was sampled from a Vulpimancer, a race of canine-like creatures from Vulpin. A pitch black planet at the galaxy's edge, Vulpin has long served as a dumping ground for hazardous materials far too dangerous for other worlds. The little that was once natural here long ago became corrupted by dangerous outside influences. Part penal colony, part toxic waste dump, whatever life that does survive here among the subzero temperatures and the poisoned forests must learn to adapt to the harshest of climates.

Notably, Vulpimancers are also a common species in the Null Void, though the ones from this place tend to have a much more monstrous appearance.

  • Angry Guard Dog: With ape arms.
  • Badass Normal: Compared to the other aliens, at least.
  • Beware My Stinger Tail: Ultimate Wildmutt gains a spiked tail.
  • Call A Vulpimancer A Dog
  • The Cameo: Made a brief appearance in "Viktor: The Spoils", while Ben was unconscious, before making his official reappearance in "Prisoner 775 is Missing".
  • Disability Superpower: Has no eyes but can "see" with its other senses. Except when Ben gets a cold, therefore clogging up his sinuses and rendering him blind.
  • Early-Bird Cameo: Meta example; a toyline first revealed the existence of Ultimate Wildmutt.
  • Jack of All Stats: Wildmutt has a fairly good balance of strength, durability, speed and agility compared to other aliens.
  • Skunk Stripe: Ultimate Wildmutt has one down his back. It's even got a black outline where it attaches to his back, making it more obviously this trope.
  • Super Senses: Can hear a wide range of sounds and track scents.
  • The Unintelligible: Vulpimancers do have a language, however, it is too difficult for universal translators to translate, and Wildmutt doesn't know it.
    • Averted with Ultimate Wildmutt, whose speech is understandable.

Wildvine (OS-20, OV-11)

Voiced by Jim Ward (original series), Dee Bradley Baker (Omniverse)

Wildvine's DNA was sampled from a Florauna, a race of sentient plants from planet Flors Verdance.

  • Combat Tentacles: He can uses his arms as this.
  • Cyclops
  • Divergent Character Evolution: Inverted. Omniverse gives him Swampfire's healing factor and vine-spawning seeds.
  • Glass Cannon: His explosive seeds and elongated arms allow him quite a potential for attack, but he is as fragile as any plant. Granted, his Healing Factor makes up for this.
  • Green Thumb
  • Healing Factor: Wasn't revealed in the original series (Ben never got in a situation where he was hurt that bad while in this form), but Omniverse did reveal through the character of Pax that Florauna can heal from being reduced to pieces from a blast.
  • Informed Flaw: The Bandai profile states that Florauna will quickly wither up and weaken if deprived of water, sunlight or exposed to the cold; Neither Wildvine nor the various actual Florauna that have shown up in the series have ever displayed such a weakness.
  • Overshadowed by Awesome: Swampfire possesses similar plant-based powers, plus a remarkable Healing Factor and Playing with Fire. Possibly corrected in Omniverse, where it's revealed that Florauna possess a healing factor as well.
  • Plant Aliens
  • Rubber Man
  • Tunnel King: Thanks to his roots, he is capable of digging at high speeds and move underground.

XLR8 (OS-01)

Voiced by Jim Ward (original series), Yuri Lowenthal (Omniverse)

XLR8's DNA was sampled from a Kineceleran, an incredibly fast moving species from planet Kinet. A world of violent electrical storms rapidly orbiting the sun, everything on Kinet is accelerated. Days are compressed into minutes and lifetimes are spread over weeks. Due to the ever-changing nature of their environment, Kinetan society is forever in flux. Although the inhabitants remain constant in their highly charged hyperactive nature, it is said, like lightning, that no return visitor to this world ever experiences the same place twice.

  • Breakout Alien: In the original series, XLR8 was the most popular of Ben's aliens, even winning Cartoon Network's official popularity contest. In season 2 and 3, XLR8 even started to become the most used alien in the show. This didn't prevent it from getting Put on a Bus in Alien Force/Ultimate Alien, even being replaced with Fasttrack in the latter. XLR8 finally returns in Omniverse, with Fasttrack being Put on a Bus.
  • Cool Helmet
  • Everything's Better with Dinosaurs: Looks like an armored velociraptor with wheels as his feet.
  • Flanderization: He had a fairly normal personality in the original show and was perfectly capable of moving like a normal person. Omniverse XLR8 is downright hyperactive and seems unable to move and talk without being fast.
  • Fragile Speedster: he is physically frail and will usually fall after the first punch. Still, he runs so fast you can barely see him most of the time, so punching him even once is in itself an accomplishment.
  • Informed Flaw: According to the Bandai profile, his species has problem running on water due to the static electrity they produce while moving. Yet, XLR8 has been seen walking on water with no such problems. Fans usually assume the suit might be protecting him.
  • Motor Mouth: In Omniverse.
  • Space Elves: The Bandai profile describes his species has possessing Pointy Ears and long hair, much like elves. However, since XLR8 wears a helmet and can't remove it (and every Kineceleran introduced since then wears at least a hat if not the whole helmet), this has never been confirmed. On that note, the shape of his helmet is reminiscent of the Eldars, aliens from Warhammer 40,000 who are basically elves in space.
  • Stealth Pun: understanding his name involves saying it fast.
  • Super Speed: 10 years old XLR8 can runs 500 miles an hour. It's unknown exactly how fast the older versions can go, but Ben 10,000's version of the alien was said to be able to break the speed of sound with little effort.
  • Theme Naming: Somehow Ben gave him a Punny Name that still fits with Kineceleran naming structure, even though he didn't even know what a Kineceleran was at the time.
  • Tornado Move: he can use his super-speed to generate small tornadoes for attack purposes.

    Alien Force Aliens 

Introduced in Alien Force

Alien X (AF-13)

"Motion Carried!"

Serena voiced by Vicki Lewis (Alien Force), Tara Strong (Ultimate Alien), Kimberly Brooks (Omniverse)
Bellicus voiced by Kevin Conroy (Alien Force), Jeff Bennett (Ultimate Alien), Eric Bauza (Omniverse)

Alien X was sampled from a Celestialsapien, a species of mysterious, god-like aliens with Reality Warping powers.

  • Awesome, but Impractical: Possibly the most extreme example of the trope; Alien X can warp reality, meaning he is technically omnipotent. Unfortunately, because Ben can only control one of the three personalities he can't use any of that power, thus making the alien not only useless, but dangerous, since Ben needs Selena's and Bellicus' accord to move or turn back to human. Because of this he is the only alien where he had to develop a failsafe on the Omnitrix to ensure he wouldn't turn into Alien X.
  • Berserk Button: Thanks to a Noodle Incident, Paradox is a Berserk Button for the entire Celestialsapien race. Killing him for an apparent violation of their restraining order against him is the one thing Serena and Bellicus will immediately agree to do.
  • Celestial Body: He seems to be a living anthropomorphic galaxy.
  • Chekhov's Gunman: Played a role in Ultimate Alien episode 16.
  • Freudian Trio: Serena is the Superego, Bellicus is the Id, and Ben is the Ego.
  • Lantern Jaw of Justice: In Omniverse.
  • The Load: Alien X is a reality-bending Super Mode alien, the most powerful being in the universe. The problem is that Ben has to get a majority agreement on the tasks at hand with two other personalities within the alien. But seeing as they can't agree on anything, and are only slighly more likely to agree with Ben, the form is literally dead weight.
  • Our Giants Are Bigger: Alien X is the size of a normal human; a true Celestiansapien measures in the thousands of feet tall; Kevin was easily able to crash land on one and still had acres of room to spare.
  • Reality Warper: More Reality Maker.
  • Running Gag: Omniverse uses him as one, playing on Rook's scepticism about his existence and Ben insisting that Alien X is real while being unable to prove it for obvious reasons.
  • Sealed Neutral in a Debate: Selena and Bellicus do not give a shit about whatever problem Ben is having. Even the destruction of the universe itself was met with indifference. Ben had to convince them to recreate the universe because he couldn't convince them to save it in time.
  • Sealed Good in a Can: Ben had the alien locked in the Ultimatrix so that it can only be activated for emergencies, and so Albedo couldn't access it were he ever to get his hands on a Codon reciever again.
  • Story Breaker Power: if not for the whole Awesome, but Impractical aspect, Ben would be invincible just by using this form all the time.
  • Voice of the Legion: When he does speak, it's Bellicus, Serena, and Ben in unison.

Big Chill/Ultimate Big Chill (AF-04, UA-03)

Click here to see Ultimate Big Chill 

Big Chill was sampled from a Necrofriggian from planet Kylmyys. An ice planet full of large glaciers and ravaged by snowstorms, Kymyys was for a long time thought to be unhabited, as any life form on it would be instantly frozen. However, Necrofriggians were able to evolve in the deep caves, developping an ability to turn intangible so they could resist extreme climates, as well as ice-based powers. Due to this ability, they were also able to colonize other similarly unhabitable worlds, such as planet Mykdl'dy.

Necrofriggians are also an asexual species that reproduce every 70 years by laying eggs.

  • Art Evolution: Goes from lean and wiry in Alien Force/Ultimate Alien to huge and bulky in Omniverse.
  • Big Chill Can Breathe In Space
  • Big Creepy-Crawlies: He looks like a giant, vaguely humanoid, skeleton-like moth. Even more so in Ben 10: Omniverse, where the skeleton aspect is dropped in favor of making him look more like a bulky bug.
  • Breath Weapon: Ice breathing, to be accurate.
  • Creepy Good: Not as much as Ghostfreak, but he still comes up as creepy, with his skull-like face and ghostly voice.
  • Extreme Omnivore: When in Mr. Seahorse mode, Big Chill's species chomp down on anything metal and regurgitate it to create a nest for their children. This even gets to the point where Big Chill can digest molten steel without any ill side effects!
  • Fauxshadow: One episode has him going out of Ben's control, and Gwen believes that he's following in the footsteps of Ghostfreak, since they're both ghost-like aliens. But actually, no, Big Chill was just getting ready to be a mommy/daddy/whatever.
  • Flying Firepower: A flyer with powerful ice breath abilities.
  • Ghostly Chill: The basis of his powers.
  • Glass Cannon: His ice powers are extremely powerful and able to defeat much stronger opponent, but his physical structure is relatively weak compared to most of Ben's fight-oriented aliens, making him easy to defeat if you find a way to attack him before he goes intangible (good luck for that though). Possibly averted in Omniverse, where he is shown to be more bulky and possibly stronger physically.
  • Harmless Freezing: Unless Ben engaged in a major Bloodless Carnage slaughterfest in "Hit 'Em Where They Live", BC's ice is like this.
  • An Ice Person
  • Intangible Mothman: And can freeze everything he phases through to boot.
  • In the Hood / Badass Cape: When folded, his wings form like a natural cape and hood, giving him a Grim Reaper-esque look.
  • Mama Bear: pregnant Necrofriggians get very aggressive when they believe their eggs are threatened.
  • Mr. Seahorse: Big Chill's species reproduces asexually every 70 years by laying eggs. Ben is no exception, to the point the form's instincts actually took over his human form to force him to turn into Big Chill regularly and prepare it.
  • Our Ghosts Are Ice-Breathing Alien Bugs
  • Super Not-Drowning Skills: The Ultimate Alien episode Deep shows him breathing and using his powers just fine underwater.
  • Technicolor Fire: Reversed. Big Chill blows blue ice breath, while Ultimate Big Chill breathes red "ice flames" that create an instant ice sheet glaciers.
  • Winged Humanoid: Specifically moth-like wings.

Brainstorm (AF-07)

Voiced by Dee Bradley Baker (Alien Force and Ultimate Alien), Corey Burton (Omniverse)

Brainstorm was sampled from a Cerebrocrustacean, a species of sentient, highly intelligent crabs from planet Encephalonus IV. This planet being a place with a lot of energy problema, its inhabitants have developed the ability to produce electrical energy of their own from their very brain. Cerebrocrustaceans are the second smartest species in the galaxy, preceded only by Galvans.

  • British Accent: In Alien Force and Ultimate Alien. In Omniverse, he has a German accent instead.
  • Crawfish Alien
  • Genius Ditz: Ben's most intelligent alien during Force/Ultimate and second most intelligent species in the galaxy. That said, Ben often gets distracted and makes foolish decisions while in this form.
  • Giant Hero Crab: Not that big, seeing how he is around the size of a human, but that's still giant compared to a regular crab.
  • Mighty Glacier: As a crab, he cannot move very quickly, but he compensates by producing powerful electrical attacks and forcefields.
  • My Brain Is Big: And visible with that.
  • Power Floats
  • Put on a Bus: His sole Omniverse appearance by Ben was being selected to fall into a dunk tank. He was the only electric alien that did not appear in "Max's Monster", on the sole justification that he's a brain alien with some minor electric side powers, and as such not an electrical alien.
  • The Rival: Apparently, Galvans and Cerebrocrustaceans tend to have a rivalry over which one of them is the smartest species in the Universe; Cerebrocrustacean villain Dr Psychobos' entire motivations resolve around proving his species is superior to the Galvans, Brainstorm once had a small argument on the subject with Azmuth, and Galvan minor characters Blucik and Driba has been known to make condescendant comments about Cerebrocrustaceans at least twice in the show.
  • Sesquipedalian Loquaciousness: Cerebrocrustaceans as a whole seem to instinctively express themselves that way, and Brainstorm is not exception. This actually sometimes become a weakness, as he can distract himself during fights.
  • Shock and Awe: his brain can generate electric attacks and forcefields by mere thought.
  • Super Intelligence
  • Telepathy: Word of God states that Cerebrocrustacanes do not speak with their mouths, and instead mentally project their thoughts as sound waves.
  • The Smart Guy: Replaced Grey Matter as this during the Alien Force/Ultimate Alien era.

Chromastone (AF-05)

Chromastone was sampled from Sugilite, the guardian of Petropia before Vilgax caused its destruction. A crystal-based alien, he possesses the ability to absorb light and energy, channeling them into attacks.

  • Cyclops
  • Divergent Character Evolution: He gained the ability to fly in Alien Force's season 3, contrasting him with the returning Diamondhead.
  • Energy Absorption
  • Flight: Gains this ability in "The Secret of Chromastone"
    • Omniverse retcons this as a "glitch power" that came about from a glitch in the Omnitrix/Ultimatrix
  • Healing Factor: though he rarely needs it, considering how tough he is.
  • Light 'em Up: though he lacks Diamondhead's Gemstone Assault ability, he trades it for an amplified ability to absorb light and energy in general, channel it inside his body and redirect it as light-based attacks.
  • Lightning Bruiser: he seems to be faster and more agile than Diamondhead, but not as strong and durable.
  • Nigh-Invulnerability: "Nigh" is the keyword.
  • Power Crystal: A living one, much like Diamondhead.
    • Is related to Diamondhead, in fact.
  • Put on a Bus: Has only made one appearance in Omniverse, and it was just being used to test Blukic and Driba's new weapon.
  • Retcon: His biography initially introduced him as a separate species from Diamondhead, called Crystalsapiens, with their own planet known as Motoresi. This was retconned as a legend in after Secret of Chromastone revealed he actually was from the same planet than Diamondhead.
  • Single Specimen Species: Sugilite, Chromastone's genetic donor, is the only Crystalsapien in existence.
  • Suspiciously Similar Substitute: To Diamondhead; ironically inverted in season 3 of Alien Force.

Echo Echo/Ultimate Echo Echo (AF-02, UA-11)

Click here to see Ultimate Echo Echo 

Echo Echo was sampled from a Sonorisian from Sonorisia. Massive, majestic gorges and immense, breath-taking canyons displaying beautiful layers of multi-colored strata from their gradual formation over the ages can be found all over Sonorosia. Sonorosians are the only natives with the innate ability to manipulate sound waves, but other creatures on Sonorosia are able to take advantage of the planet's cavernous topography, utilizing different specific locations on the landscape as whisper chambers or to generate echoes as a defense mechanism. They use the immense gorges to use echolocation to find each other.

Goop (AF-09)

Goop was sampled from a Polymorph from Viscosia. A volcanic planet with a significantly lighter grativy than Earth, molten magma flows freely on Viscosia, constantly shaping and reshaping the jagged planetary surface in its path. Lava weeps out from fissures in the ever-changing landscape. Polymorph are unicellular organism capable of shaping themselves as they want and float on the planet's lighter gravity.

  • Blob Monster: He is made of a slimy, liquid substance that requires a UFO-shaped anti-gravity device to move and keep himself together. As a result, he can alter his shape and fly as long as the device isn't damaged or shut down.
  • Confusion Fu
  • Covered in Gunge: Not him, but others when he takes a hit.
  • Hollywood Acid: Can make his substance this to attack.
    • Retcon: Said acid originally was stated by writer Matt Dwayne to be his species' way of digesting food, meaning it was meant to be a natural ability. The writers in Omniverse, however, stated it was a "glitch power" that the new Omnitrix doesn't have.
  • Nigh-Invulnerability: By way of being made of fluids. (See Blob Monster)
  • Tastes Like Chicken: According to Word of God, Goop has flavors. Ben is lime-flavored, Albedo is raspberry, and Ben 23 is blueberry.
  • This Looks Like a Job for Aquaman: His usefulness is limited in battle, but he finds practical uses in other areas, such as saving a planet from being split apart.
  • Voluntary Shape Shifting: To a point. He can flow through any opening his little saucer can get through.
  • Weaksauce Weakness: Take away his saucer, and he's immobilized. Ben uses this to get the Omnitrix back from Vilgax on Primus.

Humongousaur/Ultimate Humongousaur (AF-02, UA-06 note )

Click here to see Ultimate Humongousaur 
Click here to see Ultimate Humongousaur as used by Albedo in Omniverse 

Voiced by Dee Bradley Baker (Alien Force, Ultimate Alien), John DiMaggio (Omniverse)

Humongousaur was sampled from a Vauxausaurian from planet Terradino. A beautiful, mountainous, and lush world, Terradino is home to a vast and varied number of diverse animalistic alien species, many creatures great and small. Tragically, all these different species have not evolved to live here together peacefully. Warring factions in every group constantly seek to wrench control of society for themselves. However, the Vaxasaurians have been able to temporarily restore order through their sheer physical superiority.

Jetray (AF-03)

Jetray was sampled from an Aerophibian from planer Aeropela. An oceanic planet completely covered in water with giant spiral rocks protruding out of the sea, Aeropela is constantly visited by fog, rain and hurricanes, as well as the occasional monsoon or tsunami. Aerophibians have evolved to fly, swim and survive in this harsh climate, building their cities inside the planet's spiral rocks. In prehistoric time, their primitive ancestor used their abilities to shoot neuroshock blasts to paralyze and catch their preys. Nowadays, they still possess this ability, but use it more for self-defense.

Lodestar (AF-31)

Nanomech (Alien Swarm)

Voiced by Alex Winter (Alien Swarm), Dee Bradley Baker (Ultimate Alien)

Introduced in the movie Ben 10: Alien Swarm, Nanomech was sampled from the Hive, a species of nanomechanic parasite life forms that intended to rule over Earth then. Due to some weird result of the DNA combination, Nanomech retains some human features compared to his natural species' usual state. A living nanorobot, he is incredibly small and can shrink even further.

  • Canon Immigrant: While the other movie alien (Eon) has been absent since The Movie, Nanomech has made the transition to the cartoon.
  • Cyber Cyclops
  • Flying Firepower: A rather weak one, but he can still fly and shoot electrical attacks.
  • Half-Human Hybrid: compared to the original version of the species he was sampled from, Nanomech possess more humanoid features. This actually makes him stronger than a regular drone of his species.
  • Helium Speech: For Ultimate Alien, to go with his microscopic stature.
  • Hive Mind: In Alien Swarm, turning into Nanomech made him hear the voice of the Queen. Luckily, he resisted.
  • Incredible Shrinking Man: And he starts at about an inch.
  • Lethal Joke Character: Much like Grey Matter, he is small and possess weak attacks, but he can be used to destoy robots from the inside.
  • Mechanical Lifeforms
  • Winged Humanoid: He has four bug-like wings. The show forgot the first time for no apparent reason, but they remembered later.

Rath (AF-39)

Voiced by John DiMaggio

Rath's DNA was sampled from a Appoplexian from Appoplexia. A specie of sentient, anthropomorphic tigers-like beings, Appoplexians are Hot-Blooded, aggressive, short-tempered and not very smart, believing you can solve any problem by hitting it (Or, sometimes, just by "hitting things a lot"). They do, however, possess high durability, as well as ridiculous strength and reflexes.

  • Absurdly Sharp Claws: He can cut an entire giant rock in two with just one of his claws.
  • Badass: Possibly one of the most badass aliens in the Omnitrix.
    • Badass Boast: His "Let me tell you something" speeches are intended to be this. It usually ends up more like parodying it, but on occasions, he can actually give quite awesome ones; the one he delivered to Jarret of the Pantaphage was particularly epic.
    • Badass Normal: Aside from his claws, the only thing Rath has is his strength and he still manages to be one of Ben's most powerful aliens.
  • Berserk Button: Well, technically, he is angry all the time, but there are two major buttons that make him angrier than usual:
  • Blood Knight
  • Boisterous Bruiser: Every line out of his mouth is in the style of a pro wrestler.
  • Calling Your Attacks: In the form of Constellation/Star + wrestling move—"Polaris Pile Driver!"
  • Catch Phrase: "Lemme tell ya somethin', (full name here)..."
  • Cats Hate Water: In Omniverse.
  • Destructive Savior
  • Dumb Muscle: Ben get dumber and more aggressive in this form, making it one of his least controllable forms. However, since he usually uses it for heavy combat, he doesn't really mind.
  • Expy: Pretty obviously a tiger version of Hulk Hogan.
  • Flanderization: Omniverse flanderizes his cat-like aspects, making him afraid of water (even though tigers have no problem with water), distracted by string-like objects and laser pointers, and vulnerable to Nyancy Chan's cat control powers (even though Rook, who is also a cat-like alien couldn't be controlled).
  • Full-Frontal Assault: Ben was not happy to find out that members of Rath's species normally wear clothes.
  • Full-Name Basis: Addresses everyone by their full name and title most if not all of the time, most prominently during his "Lemme tell ya something..." speeches.
  • Hair-Trigger Temper: He's practically this trope personified.
  • Immune To Lasers: It just makes Rath mad!
  • Jerk Jock: He doesn't have the jacket, but he sure does have the attitude.
  • Jerk with a Heart of Gold
  • Large Ham: It wouldn't be Rath without this.
  • Lightning Bruiser
  • Leeroy Jenkins: Is always itching for a fight and will charge head-first into danger.
  • Meaningful Name: (W)Rath, the "Apoplexian". Doesn't get much more obvious than that.
  • Mega Neko: What? He looks like a big anthro tiger.
  • Metaphorgotten:
    • In "The Con of Rath"
      Rath: A man's food is his castle!
      Ocatagon: I think you just and mixed your metaphors.
    • And here in Above and Beyond
      Rath: You want a piece of Rath? You got a piece! But you just bit of a piece bigger than your stomach can chew!
      Rath: (Beat) I KNOW!
  • Naked People Are Funny: Omniverse reveals that Appoplexians have a sense of shame, and typically wear clothes. Rath doesn't.
  • The Nicknamer: Calls Vulkanus "Baby Man", and Seven-Seven "Karate Man".
  • Nigh Invulnerable: Getting hit with a laser doesn't phase him, nor does dropping out of the sky and causing a giant crater of him knock him out.
  • Ninja Pirate Zombie Robot: An alien who looks like a tiger and fights and acts like a wrestler. That sums him up.
  • No Indoor Voice: This is pretty much his standard way to talk. He only lowered his voice once in the whole franchise.
  • Papa Wolf: After warming up to the Tiffin. To the point that he'd knit a sweater out of an alien's organs if it declared war.
  • Stellar Theme Naming: His wrestling moves are based off of stars. Lampshaded when it comes to "Sirius butt kicking!"
    Manny: Wait, is that serious as in "very important" or Sirius like the star?
    Rath: THE STAR!
  • Story Breaker Power: He's extremely strong, can survive dropping from thousands of feet in the air (To the point that he tries to kick the Rath-shaped crater he made) and isn't affected by lasers at the slightest (there are burn marks around him). The only things that prevents him from mauling everyone in sight are his limited intelligence and Hair-Trigger Temper.
  • Super Strength
  • Third-Person Person: Additionally, addresses people by full name or title.
  • Tsundere: Male example, possibly parodied; he has a soft spot for his friends, but usually blows them off with a "Whatever!"
  • Unstoppable Rage: Basically exists in this state.
  • Weaksauce Weakness: Gone Fishing reveals that Rath, being a cat-like alien, is terrified of water.
  • When All You Have Is a Hammer: Kevin notes that all of Rath's species believes that anything can be solvable by hitting it. According to Rath, this is incorrect- "Sometimes you just need to hit things a lot."
  • Wolverine Claws: Except he only has one on each hand. In the middle of them.
  • Wrestler in All of Us: Piledrivers and Armbars galore.

Spidermonkey/Ultimate Spidermonkey (AF-08, UA-01)

Click here to see Ultimate Spider-Monkey 
Click here to see Ultimate Spidermonkey as used by Albedo in Omniverse 

Voiced by Dee Bradley Baker, Paul Eiding (Albedo as Ultimate Spidermonkey, Omniverse)

Spider-Monkey was sampled from an Arachnichimp, a species of sentient monkey-like aliens with arachnoid features from Arachscimia. Arachscimia is a jungle-like planet with incredibly tall trees and large, dangerous predators on the ground. As a result, Arachnichimp have to live in the trees in elevated houses to survive.

Swampfire/Ultimate Swampfire (AF-01, AF-46)

Click here to see Ultimate Swampfire 

Swampfire was sampled from a Methanosian from planet Methanos. Methanos is a swampy planet, bathed in stinky methane that would be toxic to humans. Its inhabitants, the Methanosians, originally were carnivorous plants that over the time evolved into humanoid herbivores. They possess the ability to generate methanes and use it to produce fire.

  • Art Evolution: In his first appearance in Omniverse, he was almost unchanged from his AF/UA design. In Charmed, I'm Sure, he is set to be redesigned to look more "fiery".
  • Combo Platter Powers: Basically Wildvine with a touch of Heatblast.
  • Cute Little Fangs: Though only visible when up-close (as seen here), they're most notable at the start of "Prisoner 775".
  • Disney Death: Both were briefly lost in the battle against Eon, who turned them to dust, but were "revived" by Ben 10,000 at the end.
  • Elemental Powers
    • Green Thumb: In addition of being himself a plant, he can generate a gaz that allows him to control plants. If there are no plants in the area, he can also spawn seeds that produce incredibly fast-growing plants.
    • Playing with Fire
  • Healing Factor: He can grow back even after being cut to pieces. Ultimate Swampfire trades this for enhanced durability.
    • Good Thing You Can Heal: regular Swampfire tends to very frequently get shredded, mutilated or even blown up to pieces compared to other aliens.
  • Kamehame Hadoken: Ultimate Swampfire can shoot a large blast of blue flames from his palms.
  • Lantern Jaw of Justice: After he blooms.
  • Lightning Bruiser: He is physically strong enough to defeat an armored alien in one punch, yet as fast and agile as a human being.
  • Mid-Season Upgrade: In "Charmed I'm Sure" Swampfire goes through puberty and evolves into a new, more powerful form. His ability to control plants and summon vines now function at will (before he had to spray a plant with gas to control it, and his vines only sprouted up wherever he tossed his seeds) and the vines he can summon are absolutely massive.
  • Plant Aliens
  • Puberty Superpower: Around the age of 16, Methanosians go through puberty and mature into a new, more powerful form. Similarly to Big Chill's pregnancy, this had an effect on Ben's human form, causing him to break out with acne.
  • Super Strength: Not the strongest alien in Ben's arsenal, but he still has enough physical strength to knock down armored knights.
  • When Trees Attack: Ultimate Swampfire

    Ultimate Alien Aliens 

Introduced in Ultimate Alien

AmpFibian (UA-08)

Voiced by Yuri Lowenthal (in "Fused" and Omniverse), Dee Bradley Baker (Ultimate Alien)

The last of the Andromeda Five to be obtained. Ampfibian was sampled from Ra'ad, who belonged to the Imperi, a species of Electric Jellyfish-like creatures with powerful electrical powers.

  • Electric Jellyfish: An anthropomorphic version.
  • Fragile Speedster / Squishy Wizard: He is the only one amongst the Andromeda Five to lack any natural armor or exoskeleton, but he makes up for it by being far more mobile and possessing a large amount of versatile powers.
  • Super Not-Drowning Skills: Has the ability to breathe underwater.
  • Super Power Lottery: He has the biggest one amongst the Andromeda Five; his electrokinesis has many forms, including:
  • Weaksauce Weakness: Sort of. Despite being a jellyfish-like alien, and being able to breathe underwater, he is vulnerable to water. Word of God is that he can use his electricity just fine if he's fully submerged, but if he's using electricity while entering the water, or is only partially submerged, he will electrocute himself.

Armodrillo (UA-09)

Voiced by Dee Bradley Baker (Ultimate Alien), John DiMaggio (Omniverse)

The fourth of the Andromeda Five to be obtained. Armodrillo was sampled from Andreas, a Talpaedan from the planet Terraexcava.

  • Dishing Out Dirt: Sort of; he has the ability to dig and cause earthquakes rather than directly controlling earth.
  • Mighty Glacier: the tallest and strongest of the Andromeda Five when it comes to brute strength, but also rather slow. That is, as long as he is not digging.
  • Powered Armor: Appearance-wise, but it's organic.
  • Super Strength
  • Pile Bunker
  • This Is a Drill: He doesn't really have one in the original show, but Omniverse portrays him spinning his hands like drills.

ChamAlien (UA-32)

ChamAlien was sampled from the alien only known as Prisonner 775 in Prisonner 775 is missing. This alien was a chameleon-like alien with the ability to turn invisible.

Clockwork (UA-47 note )

Clockwork was sampled from a Chronosapiens, a specie of robot-like aliens with the ability to manipulate time.

  • Ascended Extra: Similarly to Articguana, he was first seen as one of Ben 10,000's aliens before being used by present Ben.
  • Bling of War: Except he's the Squishy Wizard in practice.
  • Clockwork Creature
  • Glass Cannon: His lasers can age you to dust in seconds, but one blast that other forms just shrug off is enough to knock him out and break his arm.
  • Mechanical Life Form: Seriously, just look at the picture.
  • Pensieve Flashback: Another ability of his is casting holograms of past events over the location where they happened, through whomever is around.
  • Story Breaker Power: Clockwork's time beams can age anything to dust in seconds, so any enemy Ben hits with them will be killed almost instantly. Hence why Clockwork is never used in combat, unless it's against enemies with similar time powers like Eon.
  • Time Master: Though he seems to have his limits, seeing how he never use it to travel through time like Paradox does.
  • Time Stands Still: As demonstrated in "Bengeance is Mine", he can slow down time while moving at normal speed, making him appear super-fast to observers. Ben didn't know he could do it at the time.

Eatle (UA-42)

Voiced by Dee Bradley Baker (Ultimate Alien), Eric Bauza (Omniverse)

  • Big Creepy-Crawlies: Looks like a giant rhinoceros beetle.
    • He looks even more like one in Omniverse.
  • Extreme Omnivore: Much like Upchuck, he can eat everything, including metal and concrete.
  • Expy: His powers aren't really different from Upchuck's; they consist mostly in eating non-organic materials to procude energy attacks from it. The only reason he isn't a Suspiciously Similar Substitute is because Ben was still using Upchuck when he got him.
  • Four-Legged Insect
  • Horn Attack: His horn can shoot energy beams after eating something.
  • Mighty Glacier: At least compared to Upchuck, he is significantly taller, bigger and stronger.
  • The Worf Effect: Doesn't get a chance to do anything in his first appearance before getting clobbered by an Ascalon-powered Vilgax. He is the only alien ever used by Ben to get this treatment, and the first alien whose power wasn't revealed in his first appearance (the only others so far being Joke Characters from Omniverse).

Fasttrack (UA-28)

Fasttrack was sampled from a Citrakayah from the planet Chalybeas.

Jury Rigg (UA-48)

Voiced by Dee Bradley Baker (Ultimate Alien), Bumper Robinson (Omniverse)

  • Evil Counterpart: Well, not exactly evil, but he is something of a more mischevious version of Grey Matter.
  • Genius Ditz: When fixing things rather than breaking them. A good example was in Gone Fishing, where he defeats a whole army of robot pirates of his own... by breaking several of them and using the pieces to build a new, more powerful version to fight the remaining ones. He also built Ben's motorcycle, the Tenn-Speed. And reprogrammed the Forever Knights' Highbreed Pulse Generator to permanently mutate Will Harangue into an alien.
  • Griping About Gremlins: Basically an alien version of a Gremlin. Omniverse accentuates this by giving him an aviator suit.
  • Heroic Comedic Sociopath: When in this form, Ben feels a natural compulsion to destroy any non-damaged machine or device that is around him (the first time he used it, he ended up wrecking Kevin's car again). When used right, however, he can actually prove useful by repairing or modifying the machines.
  • The Imp
  • Mr. Fixit
  • Token Uncontrollable Alien Form: Ben has little direct control over Jury Rigg, at best being able to direct his impulses toward a specific task.

NRG (UA-16)

Click here to see his true form 

The third of the Andromeda Five to be acquired by Ben. NRG was sampled from alien criminal P'andor, a Prypiatosian-B, who was actually a radioactive Energy Being trapped inside a Powered Armor to prevent his radiation from killing those around him. While in the armor, NRG can produce intense heat and shoot energy beams from his visor, but, if the armor is opened, he can unleash his real powers, which include radiation, flight, heat beams and the ability to feed on radioactive sources.

Shocksquatch (Ben 10 & Generator Rex: Heroes United)

Voiced by David Kaye

Shocksquatch was sampled from a Gimlinopithecus from the planet Pattersonea, and was accidentally unlocked by Ben in Ben 10 Generator Rex Heroes United; Shocksquatch is a Yeti-like alien with electrical powers.

Terraspin (UA-12)

Voiced by Dee Bradley Baker (Ultimate Alien), Bumper Robinson (Omniverse)

The second of the Andromeda Five obtained by Ben. Terraspin was obtained from Galapagus, a Geochelone Aerio from Aldabra. Geochelone Aerio are peaceful, innnocent turtle-like creatures who live in harmony with nature. They possess the ability to project powerful wind through their shell, allowing them to fly.

Water Hazard (UA-06)

The first of the Andromeda Five obtained by Ben; Water Hazard was sampled from Bivalvan, an Orishan. Orishans have tough exoskeletons that make them nearly invulnerable, and have the ability to control water.

  • Crawfish Alien: He is some kind of giant vaguely anthropomorphic crustacean.
  • Jack of All Stats: Amongst the Andromeda Five; he is resilient, but not as much as NRG's armor, fast but can't fly like Terraspin or Ampfibian, strong but weaker than Armodrillo and possesses long range attack but not as powerful as NRG's or as as verstatile as Ampfibian.
  • Lightning Bruiser
  • Making a Splash: Can shoot water, absorb it and such.
  • Nigh-Invulnerability: Not Ben's most resilient alien, but his exoskeleton still offers him quite an impressive durability.
  • Super Not-Drowning Skills: Bivalvan was once seen going underwater without drowning. Water Hazard never really did the same, but it's assumed he can as well.
  • Vocal Evolution: In his debut appearance, Water Hazard sounded exactly like Bivalvan, his genetic source. In later episodes, his voice takes on a deeper tone, to set him apart.

    Omniverse Aliens 

Introduced in Omniverse

Astrodactyl (OV-28)

Astrodactyl was sampled from an unknown species from the planet Terradino, the same planet that Humungousaur's species is from.

Atomix (OV-39)

Voiced by John DiMaggio

A robot-like alien of an unknown species. He is Ben's most powerful practical transformation, second in raw power only to Alien X.

  • Ascended Extra: Like Toepick, he was briefly mentioned in the original series episode, Ken 10. Ken was disappointed that he was not one of the aliens on his Omnitrix.
  • Calling Your Attacks: "Fissile whistle!" "Nuclear winner!"
  • Flight
  • I Love Nuclear Power: A much better-controlled version, compared to NRG.
  • Kamehame Hadouken: His main attack. He even chants "HAA-MEE-NA HAA-MEE-NA HAA-MEE-NA!" while forming them.
  • Large Ham: Rivals Rath as Ben's hammiest alien yet.
  • Story Breaker Power: Being second only to Alien X in power, this is a given. Despite being his most powerful practical transformation, using Atomix would be just as overkill as using Way Big.
    • Both the Duel of the Duplicates and Galactic Monsters story arcs are wrapped up effortlessly just by having Ben turn into this guy.
  • Super Strength: Able to take out Albedo's recreated Ultimate Humungousaur…with a single punch!
  • The Power of the Sun: Creates a miniature sun, which kills Zs'Skayr. It also stays in place even after Ben changes back. He leaves it in Zs'Skayr's lab, so that even after he comes back, he won't be able to get in.

Ball Weevil (OV-09)

Voiced by Bumper Robinson

Bloxx (OV-01)

Voiced by Bumper Robinson

The first new alien unlocked in Omniverse. Bloxx was sampled from a Segmentasapien from Polyominus, a species that evolved to easily hide themselves amongst the structures of their home planet. As a result, their body is entirely made of LEGO-like bricks that can reconfigurate and stretch themselves, giving them shapeshifting abilities.

Bullfrag (OV-27)

Voiced by John DiMaggio

Bullfrag was sampled from an Incursean.

Crashhopper (OV-06)

  • Big Creepy-Crawlies: He is an alien giant anthropomorphic grasshopper.
  • Butt Monkey: A lot of his first episodes have Ben getting bad stuff happening to him while in this forms; he accidentally encased his head in rock when first testing his powers, is the first alien Khyber's pet confronts using the right predator, gets the crap beaten out of him by a Tetramand princess, mistaken for a locust by angry farmers, and the list goes on...
    • Even had a volunteer example, when Ben used himself as a bait in this form to trap the Kraken. Sometimes, you just gotta wonder if Crashhopper's real power isn't to get the crap beaten out of him.
  • Four-Legged Insect

Feedback (OV-01)

Voiced by Yuri Lowenthal

Feedback was sampled from a Conductoid from Teslavorr, a species of living electric cables with the ability to absorb and redirect energy. Unlike other aliens listed in this section, Feedback was first used when Ben was 11 years old, in the time between the original series and Alien Force. He was one of Ben's favourite and most used aliens during this period of time. This was eventually abused by Malware to hurt Ben by destroying the form with his abilities, removing the Omnitrix's ability to absorb Conductoid DNA in the process. Ben was left traumatized by the experience, to the point he actually attempted to kill Malware.

  • Back from the Dead: Brought back in Showdown Part 2 when Ben finally forgives himself for what happened to the form.
  • Beware My Stinger Tail: When Malware had him in a headlock, Feedback jabbed him from behind with his tail to break free.
  • Cyclops
  • Electric Slide: Is shown running on power lines to catch up to the getaway car of two robbers in "Showdown: Part 1".
  • Energy Absorption: He can absorb energy...
  • Family-Unfriendly Death: Malware pulls him out of the Omnitrix and he crumbles to dust.
  • Flight: He can fly by shooting energy at the ground.
  • G-Rated Drug: It's implied that he was this to Ben when he was younger.
  • Leitmotif: An electric guitar theme plays every time Ben transforms into him.
  • Lightning Bruiser: He's pretty fast and agile, and he also packs quite a punch.
  • Man of Kryptonite: His ability to absorb energy and fire it back often proves quite useful against Malware by reverting Malware's attacks. Malware eventually uses this to his advantage, overloading Feedback with his own energy and disintegrating him.
    • Ironically, this is the form Ben eventually uses to defeat him.
    • He's also this to V.V. Argost and Ultimate Humongousaur and Alien!Phil. Noticing a pattern?
  • Perpetual Smiler: Rarely seen without a cocky grin on his face.
  • Remember the New Guy: He is introduced in the backstory as Ben's favourite alien when he was eleven, despite never even being mentioned before. Justified in that Ben couldn't use him anymore and swore to never think about it again.
  • Shock and Awe
  • Spotlight-Stealing Squad: 11-year-old Ben was quite found of this alien, using him constantly in the time between the original show and Alien Force, even when other aliens would have been a more logical choice. Lampshaded several times by Gwen:
    Gwen: Don't you ever get tired of that alien?
    • Deconstructed when it turned out using him too much might cause Ben to lose control over other aliens. Then Malware took advantage of it and destroyed the form.
    • So far averted with present Ben, as he's only used Feedback sparingly since he regained him. Ironically, in Max's Monster, just when Feedback was needed the most, Ben had trouble trying to transform into him.

Gravattack/Ultimate Gravattack (OV-03)

Click here to see Ultimate Gravattack as used by Albedo 

Voiced by David Kaye

Ben's second new alien to be unlocked in Omniverse. Sampled from an Galilean from planet Keplorr, Gravattack is a small living planet with the ability to open itself in a more anthropomorphic form. He possesses his own orbit, which he has complete control over, granting him gravity powers.

  • Genius Loci: He may not be as big as an actual planet (though he is still quite tall), but he's been classified as a "living planet," hence his gravity powers. The sphere in his stomach represents the molten core of a planet. And yet somehow his species has a planet of its own.
  • Gentle Giant: While not really planet-sized, he is still bigger than Fourarms. However, according to Max in Food Around the Corner, Galilean are well-known for being wise and patient.
  • Gravity Master: As a living planet, he has his own orbit that he can manipulate at will, allowing him to control gravity. He can use it both manually, or go in planet mode and cause objects to gravite around him.
  • Hoist by His Own Petard: Gravattack specializes in this by redirecting projectiles back at whoever fired them.
  • Mighty Glacier: As long as he is not hovering, at least.
  • Power Floats: When in planet form.
  • Shockwave Clap
  • Shockwave Stomp
  • Story Breaker Power: It's quite possible that he's not used terribly often by the writers due to the fact that his abilities amount to controlling gravity, which, unlike Way Big, who often fights enemies just as big and strong as him or ones that prove they're dangerous, makes him much harder to be defeated in a realistic fashion due to the fact that Ben could just make it hard for them to even move or launch them into space. "Food Around the Corner" shows that Gravattack is not entirely invincible, his planetary core can be destabilized, resulting in a massive explosion, but this required flea-sized aliens to pull off and definitely isn't something that can be done on the fly. Furthermore, what can hold him back is if you significantly increase your mass, which can throw off his orbit.
  • Super Strength: Expectable when you consider he is a vaguely human-sized anthropomorphic planet.
  • Vocal Evolution: In "Vilgax Must Croak", his voice is not as deep as it was in "A Jolt from the Past".

Gutrot (OV-45)

Voiced by Rob Paulsen

Gutrot was sampled from an unknown species. His innards are comprised mostly of gaseous chemicals, which he can combine into a virtually limitless array of compounds and unleash them in gaseous form from the vents on his body.

  • Area of Effect: An actual limitation to his ability; when it can affect everyone around him, it include his allies.
  • Blow You Away: This trope is another of his disadvantage, where wind can carry his gaseous chemicals away easily.
  • Chemistry Can Do Anything: So long as Ben has a vague idea of what he needs to do, he can come up with a chemical compound that fits the situation.
  • Expy: Based off of Koffing, Derrick J. Wyatt's favorite Pokemon.
  • Fartillery: Just one method of expelling his gases
  • Friendly Fire: Averted; he cannot will the chemical gases to not affect his allies in the process.
  • Instant Expert: Instinctively knows how to form chemical compounds as necessary, including their names and specific effects. Points out that he has no idea how he knows this. This contrasts Chemistry normally being Ben's weaker subject.
  • Poisonous Person: Through the ability to manufacture basically any chemical compound.
  • Story Breaker Power: If Ben were willing to kill and/or much more familiar with certain chemical compounds, this form could defeat almost anything that breathes. Then again, he had to make sure said certain chemical compounds won't reach those he's not willing to kill first (such as his allies).

Kickin Hawk (OV-11)

Voiced by Yuri Lowenthal

Kickin Hawk was sampled from Psyphon's alien henchman Liam during a confrontation in "Outbreak". A bird-like alien of unknown species, he possesses high physical abilities as well as a pair of natural blades on his two arms. Despite being of the same species as Liam, he looks very different from him. Word of God states that this is because the species has a very wide variety in plumage, and the king resembles a peacock.

Molestache (OV-11)

Voiced by Yuri Lowenthal

One of the multiple aliens revealed in "Outbreak". Molestache is a mole-like alien of unknown species. Few things are know about him, though, according to Ben, he is rather useless.

Pesky Dust (OV-11)

Voiced by Yuri Lowenthal (Outbreak), Tara Strong

Another of the many aliens revealed in "Outbreak". Pesky Dust is a fairy-like alien called a Nemuina.

The Worst (OV-11)

Voiced by Yuri Lowenthal

The Worst is a yellow fat blob-like alien with a pair of green underwear with white stripes on it. He was unlocked in "Outbreak".

Toepick (OV-20)

Voiced by Eric Bauza

  • Ascended Extra: Was briefly mentioned in the original series episode "Ken 10"; He was one of the aliens on Ken's Omnitrix, but Ken had Ben swap him out for Grey Matter, as Toepick was too disgusting for his taste. He finally makes an appearance in the episode "Special Delivery" in Omniverse.
  • Creepy Good: He doesn't look scary at first, but the effect of people seeing his face is... disturbing. To better put it: Toepick's face scared the hell out of Psyphon. According to Word of God, he can't even look at his own face without being frightened.
  • The Dreaded: his literal power when he removes his mask.
  • Heart Is an Awesome Power: Being indescribably hideous turns out to be a rather useful power.
  • Please Keep Your Hat On
  • Story Breaker Power: Both times he appeared, he saved the day by merely standing in front of the villain. The second time was an accidental transformation and Ben didn't even seem to realize who he was at the time. However, this wouldn't work on robots, beings without emotion, or beings that are blind.
  • Take Our Word for It: His face is so hideous that it has to be hidden behind a cage-like mask. When it opens, it's so horrible that it isn't shown onscreen.

Walkatrout (OV-11)

Voiced by Yuri Lowenthal

Walkatrout was sampled from a Walkatrout. Walkatrouts live a on a planet with naturally occurring sidewalks. Their king walks bristly.

Voiced by Yuri Lowenthal

Whampire (OV-48)

Voiced by John DiMaggio

Whampire is the Omnitrix's DNA sample of an extinct species called Vladat from Anur Vladias and Anur Transyl in the Anur System.

The DNA sample was acquired in extraordinary circumstances when Zs'Skayr brought the Vladat DNA source Lord Transyl back to life by using the power he stole from the Alpha Rune.

Ben 10 Main CharactersCharacters/Ben 10 Ben 10 Villains Original Series
Ben 10 Main CharactersCharacters/Western AnimationBen 10 Villains

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