List of Ben 10 aliens

This is the list of all aliens of the Omnitrix and Ultimatrix showed in the Ben 10 universe

Contents

Aliens introduced in Ben 10

Heatblast

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Heatblast is a Pyronite (pyro- meaning fire and -nite as in ignite) from the star Pyros. He is Ben's first transformation, accidentally activated in the pilot episode of the original series, "And Then There Were 10" when Ben was trying to remove the Omnitrix immediately after it first attached to him.

Heatblast is a humanoid magma-based life-form that can control the heat at will, either projecting it in a wide range of forms or absorbing it into himself. With this ability, he can't just fire streams of flame or creates fireballs, he can manifest tornadoes of flame, used to carry himself and others in a short distances; can radiate heat in all directions for a localized explosion; he can also achieve flight by firing at the ground to propel himself like a rocket. Apart from this, Heatblast showed to be a highly durable alien, due he is made of rock. When Ben gets a cold, Heatblast's powers are reversed, giving him cryokinetic (cold and ice) powers instead of the normal pyrokinesis (heat and flame). Heatblast's powers can be negated by sufficient amounts of water or similar fire-extinguishing materials and large amounts of water can extinguish him permanently. He is also unable to lower his own body temperature, which prevents him from touching things without burning them, people included.

Ben's 10-year-old version of Heatblast made an appearance in Ben 10: Ultimate Alien episode "The Forge of Creation". His look changed a bit, his rock was redder, and his hands and the spaces between the rocks became a more solid color of yellow. Heatblast reappears through the Ultimatrix, the first for 16-year old Ben, in "Viktor: The Spoils" to defeat King Xarion in Dr. Viktor's body, and now has a darker skin tone, similar to Alan Albright.

Heatblast appears as a playable alien form in "Ben 10: Protector of Earth".

Wildmutt

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Wildmutt is a Vulpimancer (a play on vulpine, which means fox) from the garbage planet Vulpin

Wildmutt is a vaguely dog-like beast alien whose physical features are a cross between a lion and a gorilla. Though able to fight with animalistic speed and strength, he doesn't speak and has no eyes and thus relies on gills on his neck for thermography echolocation, both his senses of sound and smell; his smell is more advanced than humans. However, his only weaknesses are anything that can overwhelm his senses like a loud sound or a horrific smell. According to various profiles on Wildmutt, the porcupine-like quills on his back supplement his radar sight and can also serve as weapons, either protecting him while he's rolling, or as projectiles fired off at will, this ability is unique to adult Vulpimancers, and since Ben's version is only ten years old, these quills have not fully developed. Ben first transformed into Wildmutt in "And Then There Were 10" after his experiment with the Omnitrix, thus his first intentional transformation.

In Ben 10: Ultimate Alien, Wildmutt's design was basically unchanged, except that his lips were orange instead of black and he has Ultimatrix symbol on his chest. Wildmutt made a few brief appearances in the third series, but his official debut was in "Prisoner #775 is Missing", where he used to track the invisible alien prisoner, and as he doesn't speak, Gwen shout out his name for him.

Ultimate Wildmutt

As Ultimate Wildmutt, he gained the ability to speak; he is a red-skinned version of himself with bony spikes protruding from his back, and a stinger-like spike on the end of his tail. He is stronger than the regular form, with longer claws and has a tail with a scorpion-like stinger at the edge. Ultimate Wildmutt first appears in "Prisoner #775 is Missing" when he manages to subdue the alien prisoner.

Diamondhead

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Diamondhead is a Petrosapien (Petro is a Greek term referring to rocks, sapien referring to an intelligent being; Petrosapien would mean "intelligent rock") from the planet Petropia (a combination of Petro and topos, forming a word similar to "rock place"). The planet was destroyed by Vilgax with a help of Tetrax, who unknowingly helped him create the weapon that destroyed it. This was originally the case, but in "The Secret of Chromastone", it was revealed that the object used to destroy Petropia was a crystal that must be used by Sugilite (the Crystalsapien whose DNA was used for the sample of Chromastone) to recreate the planet. Petropia was reborn in this episode, and all Petrosapiens now resemble Ben's Diamondhead form.

Diamondhead's body is composed of an extremely durable organic crystal, which resemble to Taedenite, making him nearly invulnerable. Like Heatblast, Diamondhead can control his crystal physiology at will, allowing him to create crude crystal weapons from any part of his body on demand or fire crystal shards from his hands. This same ability also allows him to regenerate to an extent, such as re-growing lost limbs, in addition to growing crystal from himself, Diamondhead can grow crystal over the ground; and as his crystal body acts as a prism, refracting the beams. The one drawback to Diamondhead's crystal form is the crystal itself, which can shatter if exposed to sufficiently strong sonic vibrations, while Petrosapiens can regenerate limbs, there is a limit to how much damage they can recover from. Ben first transformed into Diamondhead to destroy Vilgax's giant robot sent to take the Omnitrix in "And Then There Were 10". In the planning stages, Diamondhead was set up to be one of the aliens Ben would have discovered later on, while Cannonbolt would have been one of the original ten.

In Ben 10: Alien Force, Diamondhead was regained after Chromastone was temporarily destroyed by Vilgax. He no longer wears the original costume, instead, has a body composed of material similar to that of Chromastone, and the Omnitrix/Ultimatrix symbol moves to his chest from his left-chest.

XLR8

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XLR8 is a Kineceleran (a portmanteau of the words "kinetic" and "accelerate") from the planet Kinet (the first part of kinetic, which is movement energy).

XLR8 resembles a skinny semi-armored velociraptor, the base creature for the form's design. He has wheel-shaped feet, scissor-like claws and wears a helmet with a windshield, which is part of his alien biology, leaving the features of his head unknown. XLR8 has the ability to manipulate friction to reach speeds of 300 mph in an instant, and the same power allows him to climb up walls and run on water with relative ease. Using his speed, XLR8 can perform a number of unique feats, like create tornadoes through centrifugal force, either through running in a small circle or spinning; and can deliver speed-enhanced attacks in fast succession. Amazing reflexes accompany this speed, allowing XLR8 to quickly dodge attacks. Ben first transformed into XLR8 when he decided to play around with his newfound power, also used him to get revenge on Cash and JT which he fought with earlier in the episode "And Then There Were 10".

He reappears in Ben 10: Ultimate Alien, with no difference from the original series. XLR8 was first used in the Ultimatrix in the crossover special "Ben 10-Generator Rex: Heroes United" to grab Dr. Holiday from Alpha Nanite.

XLR8 appears as a playable alien form in "Ben 10: Protector of Earth".

Grey Matter

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Grey Matter is a Galvan (a play of galvanization) from the planet Galvan Prime. Galvans are gray-skinned, frog-like aliens that can live for several millenia. Though about 5 inches tall, Galvans have a great amount of calculative and technical intellect, being able to create almost anything from spare parts and deduce the function of any device at a glance. They can also climb any surface to tiny suction cups on their skin while having sharp teeth and slimy skin makes them difficult to grab.

When Ben assumes the form, Grey Matter's intellect makes him a problem solver in difficult situations while able to reach places his original size would not permit. Unfortunately, Grey Matter's size makes him unsuitable for battle, and hence Ben must outsmart his enemies while using the form. Despising Grey Matter has been accessed most of times by accident, especially when he wants a large, powerful alien, Ben found value in the form's capability to hide in very tightly compacted areas and intellect to solve many situations. Ben first transformed into Grey Matter in "Washington B.C." to search for a rare gold card of the Sumo Slammer in cereal boxes of a supermarket.

Fourarms

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Fourarms is a Tetramand (tetra meaning four in Greek, mand being arms in Latin) from the desert planet Khoros, the place epitomizes a dystopia, resulting in the strength-oriented Tetramands.

Fourarms is a 12 feet tall powerhouse with armored skin and extremely dense musculature, making him unmatched in pure physical strength, and one of Ben's favorite alien, and as his name says, he has four arms. His strength is such that he can create shockwaves simply by pounding the ground or clapping all four of his hands together, dubbed the "Big Smack", and his leg strength allows him to cross entire city blocks in a single jump. However, all the extra mass of his muscles and heavy skin makes Fourarms relatively slow, and his size likewise makes using things designed for smaller species difficult, especially when enlarging them. When under the effects of an illness, his strength and stamina are somewhat lessened and he develops pungent hives in his armpits. With Fourarms, Ben has a tendency to make punning with arms and has habit of saying they can do something "with three hands tied behind their backs". Ben first transformed into Fourarms to fight the giant woolly mammoth that Dr. Animo had reanimated in "Washington B.C.".

Fourarms reappeared in Ben 10: Ultimate Alien, wearing a much different costume and having an appearance reminiscent of a gladiator. He now has more authentic clothes of his original species (like Tini), with gold bracelets on his wrists and ankles, a ponytail, two gold sashes that cross over his trunk with the Ultimatrix symbol on the center of his chest, and green eyes instead of yellow. Fourarms is regained in "Video Games" in a fight with Ssserpent, and Ben was surprised because he did not know he was still there.

The Ben's 10-year-old version of Fourarms made an appearance in the Ben 10: Ultimate Alien, in the episode "The Forge of Creation". With the exception of the Omnitrix badge on his shoulder changing from white to green, his appearance remained unchanged from the original series.

Fourarms appears as a playable alien form in "Ben 10: Protector of Earth" and "Ben 10 Ultimate Alien: Cosmic Destruction" (Only for PS3).

Stinkfly

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Stinkfly is a Lepidopterran from the swamp planet Lepidopterra (a play on lepidoptera, the scientific name for butterflies and moths).

Stinkfly is a combination of various Earth bugs, like dragonflies, crickets, and preying mantises specifically. His primary ability is flight facilitated by the four thin wings on his back, which grant Stinkfly high mobility and speed; has four eye stalks give him a wide range of vision from the sky, including the ability to look directly behind himself, also his eyes and mouth has pollen ducts that allows to excrete high-pressure streams of liquids, which makes him having a bad smell; the type of liquid can range from a flammable toxin to an immobilizing jelly; and his razor-sharp tail and pincer-like legs can also be used in melee combat. He also possesses disproportionate strength, enough to carry people and objects heavier than himself. In "Don't Drink the Water", the child form of Stinkfly (Stinkyfly) was able to unleash a powerful herbicide gas by farting. The water is Stinkfly's weakness, because if the water gets his wings, it will make them too heavy to flight, in addition, while his body is fairly strong, his wings are not; a more minor inconvenience is his intense body odor, which is a result of the oils he secretes to keep his joints moving. Ben first transformed into Stinkfly in "Washington B.C." when he had to save Gwen after she fell from the Washington Monument, and defeat Dr. Animo. Stinkfly was the first alien that Ben named on screen.

The 10-year-old Ben's Stinkfly made an appearance in the Ben 10: Ultimate Alien episode "The Forge of Creation". His eye color changed from orange to green, his hands are green instead of black, his teeth are white instead of green, also, was showed an ability to shot a light blue beam from his eyes. His Omnitrix badge also changed from white to green.

Ripjaws

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Ripjaws is a Piscciss Volann (from piscēs, the Latin word for fish) of the artificial water planet Piscciss (a play on the constellation Pisces), a 98% water-based world with solid matter only at its core, and the gravity is controlled by an anti-gravity multiplier, which holds all water and the beings on the planet, but actually was a piece of the Map of Infinity, which Aggregor takes the instrument and the Goop's anti-gravity projector replaced, controlling the gravity.

Like Stinkfly, Ripjaws shares a number of traits of Earth aquatic life-forms-namely alligators, eels, anglerfish, and sharks-combined into a single being. Naturally, his main ability is being able to breathe underwater and withstand a remarkable amount of pressure; can swim at great speeds, and his sharp teeth and claws can pierce through almost anything, his lower jaw can unhinge to allow him to bite much larger objects; has a luminescent dangler allows him to see in the in the dark. Through his tail, he hides a pair of legs for travel on land, although Ripjaws is more limited alien by his need to remain hydrated, he dehydrates quickly if he stay out of the water for even a few minutes, Ben wants Ripjaws to use in water, therefore, he is the one of the original 10 aliens less used in the series, he even hadn't been seen on the season 3 of the original series. Ben first transformed into Ripjaws in order to take the Krakken's eggs back from Jonah Melville in "The Krakken".

In Ben 10: Ultimate Alien, Ben regained Ripjaws in the Ultimatrix (likely from being on Ripjaw's home planet, Piscciss). The Ultimatrix symbol moves to his chest from his left-chest, now he is more catfish-like, his eyes are green instead of purple and have pupils, he no longer has striped fins or clothes, the teeth are smaller and inside the mouth, he has green lips, thick eyebrows, bigger claws, and the phosphorescent light on his head also looks smaller; this looks is different of the opening of Ben 10: Ultimate Alien. Ben used Ripjaws in the first time in the Ultimatrix in "Perplexhahedron", to escape from a water trap.

Upgrade

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Upgrade is a Galvanic Mechomorph (a portmanteau of mecho- meaning machine and -morph meaning shape) created by the Galvans, from the Galvan Prime's moon, Galvan B. Originally uninhabited moon, Galvan scientists were mining the resource-rich world for its raw materials, but they accidentally misused an experimental self-replicating nanotechnology, which bonded with Galvan B's minerals and imbued the fertile ground with sentient consciousness. Because of their make up, Galvanic Mechomorphs can reshape their bodies at will, the ability ranging from evading physical contact to forming simple constructs and offshoots.[1]

The Galvan Mechomorphs' primary ability is to merge onto any technological object, advancing it and usually in control if the machine has low AI or nine. The only weaknesses they have are electricity and any form of metal corrosive.[1] Another downside is that a Galvanic Mechomorph cannot bond with pure organic life forms, thus Ben's transformation is incomplete in terms of his voice remaining the same, aside from the more computerized tone behind it. Ben first transformed into Upgrade in "Permanent Retirement" to stop some criminals who were robbing an ATM.

Upgrade reappears in Ben 10: Ultimate Alien, he looks different from the original series, where was white, now is green; he still has the green stripes on the black side, but now has black stripes in the green side. Ben first used him in the Ultimatrix in the crossover special "Ben 10-Generator Rex: Heroes United", to merge with Rex Salazar's nanites and upgrade his machines to fight Alpha-Omega.

Ghostfreak

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Ghostfreak is an Ectonurite (ecto is a playing on ectoplasm) one of Ben's aliens who's DNA was taken from Zs'Skayr, the High Ecto-Lord of the home-world Anur Phaetos (phaetos is a playing on Phaëton), who existed in the Omnitrix due to Ectonurites having the ability for their mind to exist in even in the smallest strand of their DNA.

Ghostfreak's original appearance was similar to that of a ghost with only one eye and a black track along his skin, but after freeing himself, he tore off the second skin to reveal his true horrifying form. He has ghost-like powers, being able to phase through matter, be invisible, fly and possess humans by going into them and controlling them; he also has telekinesis over beings he possesses, and also becomes far stronger if he's in complete darkness, which allows him to become even scarier in appearance and fire a powerful energy beam from his chest. Ben first transformed into Ghostfreak to sneak out of his great aunt's house in "Permanent Retirement".

In "Ghostfreaked Out", was revealed that Zs'Skayr's mind lay within the DNA sample of Ghostfreak, and he finally manages to force his way out of the Omnitrix, showing his true form, he is bigger, with a skull face turned down, sharp claws, and ghost tail with stripes.

In Ben 10: Alien Force, Ghostfreak was regained in "Ghost Town", when Ben absorbed Zs'Skayr, using the DNA absorb method of escaped Omnitrix aliens he used on "Vengeance of Vilgax", but with Ghostfreak's true form, though moment of transforming Ghostfreak quickly regained control of Ben, but with the help of Vilgax, Ben took control and transformed back.

Ghostfreak returned in his original form in Ben 10: Ultimate Alien, but his looks is different from the original series, having white skin, bigger eye, and the Ultimatrix symbol moves to his chest from his left-chest. Ben used Ghostfreak in the first time in the Ultimatrix in "The Ultimate Sacrifice" to take control of Sentient Ultimate Humungousaur but failed.

Cannonbolt

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Cannonbolt (A play on cannon ball) is an Arburian Pelarota (based on pelota, the Spanish word for ball and rota, a play on rotation) from the planet Arburia, which it was destroyed by "The Great One", one week prior to "The Big Tick". After this, the Arburian Pelarotas moved to Vulpin (Wildmutt's planet), then they mutated due the pollution to evolved to be able to live there, being into a sub-species, called Vulpinic Torgutans ("tortuga" is the Spanish word for turtle). [2]

Cannonbolt is the first new alien to appear on the Omnitrix, and eventually replaces Ghostfreak in the original series opening. He was originally meant to be one of the original ten aliens, but was replaced by Diamondhead in production.

Cannonbolt is a hulking, broad-shouldered alien covered in natural armor plating, by curling up into a ball, much like an armadillo or pillbug, he can encase himself in his armor, becoming virtually invulnerable; also with his armor, he can then roll himself like a ball, into high speeds. The drawback is that Cannonbolt quickly picks up inertia, which can make hitting more maneuverable targets difficult, as he cannot slow down quickly; in addition, Cannonbolt's speed and maneuverability is limited outside of his ball form, owing to his bulk and high center of gravity. The first time Ben used Cannonbolt was in "The Big Tick", but it was an accidental transformation, Ben intended to turn into XLR8 to go to a fast-food restaurant, the first intentional transformation was made in the same episode to try to stop "The Great One" for destroying Earth.

In Ben 10: Alien Force, Cannonbolt was regained by Azmuth after the Master Control of Omntrix was unlocked in "War of the Worlds". He didn't changed a lot, he now has green eyes instead of yellow, has no longer a black stripe on his torso, with normal canine teeth, and his Omnitrix/Ultimatrix symbol moved from his forehead to his chest.

Ultimate Cannonbolt

As Ultimate Cannonbolt, his body is light metallic cyan with a darker shade of gray on his now a metallic armor with cylindrical studs that turn into spikes when he goes into his ball form. In this state, he offers increased defense and more offensive capabilities therefore he can do more damage than normal, he also has increased speed, momentum and can bounce even higher. Ben first used Ultimate Cannonbolt in "Too Hot to Handle" to hold Kevin and P'andor, with his armor that is made of some material that can contain radiation, allowing Kevin to seal P'andor back in his suit.

Cannonbolt appears as an unlikable alien form in "Ben 10: Protector of Earth", and "Ben 10 Alien force: Vilgax Attacks".

Wildvine

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Wildvine is a Florauna (based on flora and fauna) from the planet Flors Verdance (a combination of flora and verdens, Latin word for green).

Wildvine is a plant alien with vine legs, and venus flytrap-shaped flaps covering his head. He can grow to stretch his limbs great lengths or grow thorns; merge with other plants, dig underground, and has seeds on his back that can be used as explosives, both lethal and non-lethal. When exposed to cold, kept from sunlight, or deprived of a water source, Wildvine quickly withers up, however, Ben has never encountered any problems like these, likely due to the limited periods in which the form is used on the Omnitrix, although in episodes where he was used, he could still last without sunlight or water. Wildvine makes his first appearance by accident in "Camp Fear", where Ben used to release himself and Max of the vines, and to face Mycelium.

Wildvine appears as a playable alien form in "Ben 10: Protector of Earth".

Benwolf

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Benwolf is a Loboan (based on lobo, the Spanish word for wolf) scanned from the Yenaldooshi in the titular episode; from the Anur Transyl's moon, Luna Lobo (literally translating from Spanish as "Wolf Moon").

Benwolf seems to be based on the Werewolf, from various horror films of the mid-20th century, to keep with the "horror" element associated with Ghostfreak. Ben obtains this form after Yenaldooshi scratched the Omnitrix in the episode "Benwolf", causing its DNA to be added into Ben's selection of aliens. The result of Ben's battle leaves the Omnitrix half way between "Scan Mode" and "Active Mode"; causing him to transform over the course of several hours instead of instantly as he normally does. Also Benwolf is slightly different from Yenaldooshi, his eyes are green instead of purple.

He possesses super-human strength and agility, and can send a green shock wave by peeling back his lupine snout. He can propel himself to the air by sending his shock wave on the ground; it is noted that he was never used again for unknown reasons. Benwolf is said to be affected by many other normal attacks and could be blinded by ultraviolet light, although there is no evidence showing this in the episode. Although he has color-blind vision, he never had a problem with it; he also finds it hard to resist his predatory instincts.

Benmummy

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Benmummy is a Thep Khufan (a play with Khufu, an Ancient Egypt pharaoh) scanned from an unnamed Thep Khufan in "Under Wraps"; from the desert planet Anur Khufos,.

Benmummy seems to be based on the Mummy, from various horror films of the mid-20th century, to keep with the "horror" element associated with Ghostfreak. The credits of the original series gave the name "Benmummy", though Ben has yet to name it. He is covered in many bandages which he can control, using them as tentacles, also allows him to split them apart to dodge attacks and then reform to counterattack. He can regenerate from any injury, including being torn into pieces, almost instantly and with no visible repercussions; however, his bandages are supposedly made of paper, which makes him extremely light, allowing him to be thrown even by human strength, also they can get wet or burn, it's unknown if he can regenerate from this kind of damage.

Benmummy also looks slightly different from the original Thep Khufan scanned; his eyes and the gaps between his bandages glowing green instead of purple, having black bracers and greaves, as well as a smaller mask and the Omnitrix symbol on his left shoulder, also he can speak, even though the original seems to be mute. Ben first uses him in "The Return" to fight off the Yenaldooshi, but that was an accidental transformation, and when Ben first used the form, he had trouble figuring out how to control it. Ben quickly discovers how to stretch his bandages, but has not displayed knowledge of the advanced reshaping techniques yet. Benmummy was seen again in the non-canon episode "Ken 10", when the future adult Ben Tennyson used it to take Ken out of the ventilation tube that he got stuck in when he tried to escape from his room.

Benvicktor

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Benvicktor is a Transylian (a play on Transylvania) scanned from Dr. Viktor in "Be Afraid of the Dark"; from the planet Anur Transyl.

Benvicktor seems to be based on the Frankenstein Monster, from various horror films of the mid-20th century, to keep with the "horror" element associated with Ghostfreak. Benvicktor has the ability to generate electricity and blast it at others, adhere himself to metal surfaces through electromagnetism; survive into the vacuum; also he possesses super-strength, agility and is invulnerable; Dr. Viktor displays other powers, such as being intelligent and is able to connect himself to other devices to power up. The credits of the original series gave the name "Benvicktor", even though Ben himself has yet to name it.

Benvicktor, like Benmummy and Benwolf, looks slightly different from Dr. Viktor, with longer hair and a smaller left eye; also as the others, has green eyes instead of purple, and release green electricity. Benvicktor was first used to fight Ghostfreak, the Thep Khufan and Dr. Viktor in "Be Afraid of the Dark".

Upchuck

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Upchuck is a Gourmand (from gourmet, the French word meaning "one who enjoys fine food" or "glutton") from the planet Peptos XI (based on Peptos, the Greek word for cooked or digested.)

Upchuck is a small frog-like alien with a very large appetite. He has four strong, adhesive tongues that can stretch to great lengths, allowing him to latch onto large objects and reel them in with relative ease, and his mouth and stomach stretch to facilitate the digestion of such objects; possesses several acid-filled stomachs that can dissolve all forms of inorganic matter, the items ingested are converted into explosive balls of liquids that can be expelled at will with great accuracy. He can also eat energy and rays, when he eats rays, he can shot the ray just as it is fired.

Despite his appetite, Upchuck seems that he cannot to easily digest human food, as Ben realized when he tried to eat pizza, only to discover the alien form did not like the food; he remarks that he was not able to digest it because the acids in human food are not stable enough to digest. However, in "In Charm's Way" where he fought a brought-to-life Mr. Smoothy (which was, oddly enough, actually filled with smoothy) he could drink the smoothy, this was due to either being able to now digest human food or Mr. Smoothie being digestible to gourmands. He is able to self-destruct, probably after a continued amount of bad digestion. Upchuck was unlocked by Xylene, to destroy a Vilgax's drone in "The Visitor".

Like Cannobolt, Upchuck was regained by Azmuth from "War of the Worlds". In Ben 10: Alien Force and Ultimate Alien, Upchuck's appearance is too different from the original series, now the Omnitrix/Ultimatrix symbol was moved to his chest from his left hand, his color scheme was changed to browns and yellows, and his eyes were changed from white to green, and now possesses a tail. Also his tongues are different, he has one, human like tongue, it could have been a mistake and should have been green and it was only 1 of the 4, and somehow, he didn't used his tongues until "The Purge".

Upchuck appears as a playable alien form in the DS versions of and "Ben 10 Alien Force: Vilgax Attacks" and "Ben 10 protector of earth.

Ditto

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Ditto is a Splixson (based on the word split) from the Earth-like planet Hathor.

Ditto is a humanoid child alien with the ability to clone himself without limit, but each clone operates independently, regardless of whether or not Ben wants them to, and is indistinguishable from the others, and somehow, he can breathe under the water. Though the clones are autonomous, they share a link with each other, all them feels someone's pain, and the death of one clone will cause the death of the rest, which negates the usefulness of making large numbers of clones, explaining the reasons why Ben rarely creates many clones of Ditto in the limited times he has appeared. His child-size is also neither stronger nor faster than his size and build suggests. Ben activated Ditto accidentally in the episode "Divided We Stand", to fight against Dr. Animo's mutated seagull; his first intentional Ditto transformation was in the same episode to goofing around in the beach.

Eye Guy

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Eye Guy is an Opticoid (a play on optical) from the planet Singhtra (a play on sight).

Eye Guy is the first alien to have been unlocked off-screen, how he was obtained is never addressed. As his name says, Eye Guy's upper-body is covered in eyes, though he ironically has no eyes on his head, which consists of a mouth and a very large pair of bat-like ears. From these eyes, Eye Guy can fire numerous energy beams; the eyes can be merged to create different effects, like a freezing beam; and by merging every eye into the large eye, he can fire a stronger energy blast.

His only appearance in the original series itself was in "Ben 10 vs. the Negative 10: Part 2", where Ben was attempting to prevent the Negative 10 from stealing the Sub-Energy. He also was introduced in the first alternate opening of "Ben 10: Secret of the Omnitrix" version, on a fight with Doctor Animo.

Way Big

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Way Big is a To'kustar (a play on tokusatsu given Way Big's resemblance to characters from the Ultraman), created by cosmic storms.

Way Big is the biggest alien of the Omnitrix, standing at 200 feet. This size grants him extraordinary strength and invulnerability to most attacks; he is also is capable of creating energy blasts and move into high speed. Way Big is first introduced in "Ben 10: Secret of the Omnitrix" after Azmuth decides to deactivate the "Self-destruct mode" of the Omnitrix, unlocking him to defeat Vilgax and his army.

Way Big, like Upchuck and Cannonbolt, returns in the second season finale of Ben 10: Alien Force after Azmuth unlocks the Omnitrix Master Control in "War of the Worlds". His eyes are now green instead of yellow, the spikes on his shoulders are gone, his face is different and the fins on his hips are gone.

Way Big appears as a playable alien form in "Ben 10 Ultimate Alien: Cosmic Destruction".

Future Aliens

In the episodes "Ben 10,000" and "Ken 10", a future version of Ben from an alternate Crosstime utilises three alien forms unused in the present day. Although the events of these episodes are arguably non-canon in the first series, these three aliens would later appear in the Ben 10: Ultimate Alien opening sequence, suggesting that they, at least, are canon. Five other aliens were mentioned in "Ken 10" (Atomix, Sandbox, Snakepit, Shellhead, and Toepick), although they might not be real, because this episode is non-canon.

Spitter

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Spitter is a Spheroid (a play on sphere, probably due to the shape of his head) from the rainy planet Scalpasc.

Spitter is a large, blowfish-like alien with stubby legs (similarly shaped like that of a rhinoceros' foot), a lizard-like tail. As his name says, he has the ability to inflate himself and spit out a pressurized concentrated blast of slime, that is very slippery, can be acidic, as is shown to be highly conductive; it is also has sharp teeth, that might be used as a weapon. Spitter was first used by Ben 10,000 in his fights with Doctor Animo and then Vilgax.

Buzzshock

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Buzzshock is a Megawhatt (a play on megawatt, meaning a million watts) from the Nosedeen Quasar.

Buzzshock is a battery-like energy being that manipulate electricity; that can pass through any electrical source in a high speed; he can also duplicate himself when he is cut in half or has enough power, dividing in Mitosis-like; and can fly. Although Ben has not revealed these powers himself, he does reveal that he has the ability to send green electrical shocks, unlike regular Megawhatts, which shoot yellow; he is also slightly different from them, which are yellow while Buzzshock has green eyes and a white lightning stripe on his chest. Buzzshock was first used by Ben 10,000 in his fights with Doctor Animo.

Arcticguana

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Arcticguana is a Polar Manzardill, one of the many types of Manzardill, from the polar ice caps of X'Nelli.

Arcticguana is a blue iguana-like alien that can breathe freezing vapor. This power enables him to freeze aliens, but if his breath is used too much, he needs to catch his breath before using it to freeze things again.

He was first used by Ben 10,000 to freeze Vilgax in a river,then he suggested to call him Absolute Zero, but was accepted to be called Arctiguana.

Arcticguana returned in Ben 10: Ultimate Alien in "Ben 10,000 Returns", Ben 10,000 used Arcticguana's powers against Eon's ninjas, showing that he is indeed a canon alien. It was also confirmed by Bandai that Arcticguana would reappear in use by current-time Ben by the fourth series, as he will receive a figure in the fourth series' first line of toys.

Aliens introduced in Ben 10: Alien Force

Swampfire

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Swampfire is a Methanosian from the planet Methanos (referring to methane).

Swampfire is another plant alien with a fire-patterned head and root-like feet seemingly holding rocks, and is described as a living swamp. He has superhuman strength, ability to control plant life through a type of flammable gas, and the ability to create fire from his hands, which can also be used to launch his body for flight; the fire is created by igniting methane naturally produced within his body, which causes him to have a very bad odor. He can also produce seeds that quickly grow into vines that he can control. Has vast regenerative ability, which allows him to alter his own body, such as dig underground in vine form, growing his feet to root himself into the ground, heal his lost limbs or of other ones, making him almost indestructible. However, Swampfire is more vulnerable than Heatblast because he can be frozen for periods of time, unlike Heatblast, who is completely invulnerable to cold. He appeared in pilot episode of Ben 10 Alien Force, in "Ben 10 Returns: Part 1" after the Omnitrix had recalibrated, to fight the DNAliens, Forever Knights and defeat Kevin.

Ultimate Swampfire

As Ultimate Swampfire, he is a tree-like version of himself with a Heatblast-like face and blue gooey shells containing an organic, blue-colored napalm kerosene gel-like solution, containing a highly flammable substance that is used to create blue fire flames, which are more powerful than the normal, and when put his hands together, he creates a huge fire blast; also can shoot fire bombs. Although Ultimate Swampfire cannot regenerate himself, however this limitation was offset by his body made of petrified wood becoming more resistant to damage. Ben used Ultimate Swampfire on the first time in the Ben 10: Alien Force's series finale "The Final Battle: Part 2", to fight Vilgax, and being the first ultimate form used by Ben.

Swampfire appears as a playable alien form in "Ben 10: Alien Force The Game", "Ben 10 Alien Force: Vilgax Attacks", "Ben 10 Alien Force: The Rise of Hex", and "Ben 10 Ultimate Alien: Cosmic Destruction" with also Ultimate Swampfire.

Echo Echo

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Echo Echo is a Sonorosian (a play on sonic and sonar) from the planet Sonorosia (from the word sonoros in Galician, meaning sound).

Echo Echo is a small white silicon-based alien whose body is a living amplifier, has a headphones connected to square appendage resembling an MP3 player in his back with a port on it decorated with a binary digit situated like the number 10, and cassette tapes-like on his lower legs. He can scream at ultrasonic frequencies, capable of overloading machinery and stopping projectiles in mid-flight; also can use echolocation; channel vibrations to enhance his power and transmit sound waves through speakers. He also has the ability to duplicate himself, but unlike Ditto, in that the clones are not linked in any way and can revert even if all duplicates are not re-integrated, which splinters the original's personality. With these skills, Echo Echo can create a "Wall of Sound", where he and his clones can redirect projectiles back to their source by bouncing them off of strategically placed clones. Also, he revealed an ability to fly. The first time he appeared was to fight the Forever Knights' dragon robot in "Ben 10 Returns: Part 2".

Ultimate Echo Echo

As Ultimate Echo Echo, he is a blue, taller, with longer arms, and more robotic version of himself with black lines on his body, and his square on his back is replaced by a cassette tape-like, and his mouth doesn't move when he talks, but he can open it. In this state, Ultimate Echo Echo is unlike his regular form, he cannot duplicate himself anymore (As confirmed on the Cosmic Destruction site), but this limitation is well matched with incredible new abilities, can now shoot sonic screams and sonic waves from discs, these discs are on many parts of his body, that can be throw and controlled, which makes him the most powerful ultimate form. Ben used Ultimate Echo Echo on first time to fight the Necrofriggian colonizers, and to help Gwen and Kevin with the traps of the temple in "Map of Infinity".

Echo Echo appears as a playable alien form in "Ben 10: Alien Force The Game (Only on DS version), "Ben 10 Alien Force: Vilgax Attacks", "Ben 10 Alien Force: The Rise of Hex" and "Ben 10 Ultimate Alien: Cosmic Destruction" with also Ultimate Echo Echo.

Humungousaur

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Humungousaur is a Vaxasaurian (sauria being a clade of lizards, while vaxa in Icelandic means grow), a humanoid dinosaur alien from the planet Terradino (terra dino means "terrible land" in Latin).

Humungousaur is Ben's current favorite alien, is a 12 feet tall dinosaur-like alien that possesses a great strength and a thick layer of skin that provides vast resistance to injury; he also has the power to increase his own body size and mass growing up to sixty feet in height, his strength increases as he grows, and his dinosaur features become more pronounced, growing Stegosaurus-like plates on his back, a crest from his forehead, and spikes on his tail; Humungousaur also has proven to be durable enough to survive in space for at least a few minutes. Ben used him on the first time to fights a swarm of DNAliens and a Highbreed in "Ben 10 Returns: Part 2".

Ultimate Humungousaur

As Ultimate Humungousaur, he is larger ankylosaurus-like creature, with 20 feet tall; is a green-skinned, armored version of himself with grey horns on his head, arms, chest and back; with a mace in his tail, and his back is covered by a large, spiked shell. His genetic DNA allows him to converting his hands into bio-Gatling guns that shoot kinetically unstable bone fragments as missiles; as a result of millions of simulated battles over a thousand of years. This form was first used by Albedo in "The Final Battle: Part 1" to fight Ben as Humungousaur, being the first Ultimate Form used in the Ultimatrix. Ben first uses him in the Ben 10: Ultimate Alien episode "Too Hot to Handle" to fight P'andor and his minions (Surgeon, Hammer and Buzz).

Humungousaur appears as a playable alien form in "Ben 10: Alien Force The Game", "Ben 10 Alien Force: Vilgax Attacks", "Ben 10 Alien Force: The Rise of Hex" and "Ben 10 Ultimate Alien: Cosmic Destruction" with also Ultimate Humungousaur.

Jetray

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Jetray is an Aerophibian (derived from aero and amphibian) from the planet Aeropela.

Jetray is a manta ray-like alien who has horns extending from the center of the eyes and two wings which are attached to his arms. He is capable of flying and swimming at super-fast speeds, around 300 mph as fast as XLR8 (or probably faster), being able to reach significant fractions of light speed; he can shoot neuroshock blasts through his eyes and tail in the form of a massive explosion; also he doesn't need to breathe, enabling him to easily travel through water and space. Jetray first appears to chase Alan Albright in "Everybody Talks About the Weather".

Jetray appears as a playable alien form in "Ben 10: Alien Force The Game" (Only for Wii, PS2 and PSP versions), "Ben 10 Alien Force: Vilgax Attacks", and "Ben 10 Alien Force: The Rise of Hex".

Big Chill

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Big Chill is a Necrofriggian ("necro", meaning death, and "frigid", meaning very cold) from the planet Kylmyys (the Finnish word for coldness), a moth-like alien whose wings and antennae can fold up into a hooded robe to give him the phantom look. Other then the ability to become intangible while having superhuman strength and able to fly, Necrofriggians can breathe freezing vapor and can make ice beams from his hands. They sometimes combine their freezing abilities with intangibility to freeze anything they pass through. The downside is that a Necrofriggian's intangibility is useless against opponents who can also turn intangible as their intangibility cancels out. Necrofriggians can also asexually reproduce, laying eggs once every 80 years. During such a stage, they build a nest out of large amounts of metal, from which their babies will hatch and eat the nest before instinctively feeding on solar plasma until they mature.

Ben first assumes the form of Big Chill in "Kevin's Big Score" to chase down Kevin after he stole the Rustbucket and later to fight Vulkanus. Later, during the events of Save the Last Dance, Ben's personally is briefly overtaken by Big Chill's maternity instincts and carries out the birth process, having no memory of his actions as Big Chill once the phase comes to a close. Dwayne McDuffie revealed that Big Chill cannot turn invisible, and when he did, it was an error.

Ultimate Big Chill

As Ultimate Big Chill, he is red-skinned version of himself with flame design on his wings, antennae and around his eyes, which resembles a mask; and his voice is more gravelly than normal, having a deeper tone behind it. In this state, Ultimate Big Chill can now also create "ice flames", flames that turn into ice, they are flames that consume the heat of whatever they touch, and use that energy to burn, but instead to burn, it freezes, more and faster than the normal. He was first used in "Hit Em Where They Live", to fight Vulkanus and his Pickaxe Aliens army.

Big Chill appears as a playable alien form in "Ben 10: Alien Force The Game" (Only for Wii, PS2 and PSP versions), "Ben 10 Alien Force: Vilgax Attacks", "Ben 10 Alien Force: The Rise of Hex" and "Ben 10 Ultimate Alien: Cosmic Destruction", with also Ultimate Big Chill.

Chromastone

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Chromastone is a Crystalsapien (a combination of crystal and sapien which means "intelligent being made of crystal") but doesn't have a home-planet. The planet Mor'Otesi (Turkish word for ultraviolet) doesn't exist and Sugilite, which the genetic donor for Chromastone, is the only Crystalsapien, which lives on Petropia (Diamondhead's species).

Chromastone is Cyclops alien made of an extremely durable crystal, and has several shards of magenta crystals. He is almost indestructible with his crystal skin; has a great strength and an ability to fly; he is able to absorb kinds of energy like a conductor and channel it into ultraviolet laser blasts or less-intense natural light, he can also allow it to pass harmlessly through his body via refraction, or can be blasted back at the foe; he can seemingly produce blasts without having to absorb energy, though it may be due to absorption of radiant energy like sunlight, or streetlamps or just ambient energy; however he is unable to absorb energy when not expecting it or is too weak to do so. He first used Chromastone to stop the zombified schoolgirls in "All That Glitters".

During the episode "Vengeance of Vilgax: Part 2", Chromastone was destroyed by Vilgax, but the alien's remains reformed into Diamondhead, the reason for this is connected to the fact that Sugilite is the only one of his species. He hid himself until the time came for him to restore Petropia, which was shortly after Vilgax's destruction of the planet. It is believed that Sugilite is the guardian of the Petrosapiens, and that he was created as a backup system for the planet in case the planet was destroyed. Although Chromastone becomes accessible again after the events of "The Secret of Chromastone", Ben didn't use him until the pilot episode of Ben 10: Ultimate Alien, to fight Bivalvan, being very surprised that he still had access to the form.

Chromastone appears as a playable alien form in "Ben 10: Alien Force The Game" (Only for DS version), "Ben 10 Alien Force: Vilgax Attacks", and "Ben 10 Alien Force: The Rise of Hex".

Brainstorm

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Brainstorm is a Cerebrocrustacean (a play on cerebrum and crustacean) from the planet Encephalonus IV (a play on encepha-, a prefix referring to the brain), planet successor of several planets, the Encephalonus I, II and III; they were destroyed because primitive Cerebrocrustaceans took advantage of the storms surrounding the Encephalonus planets and it in turn resulted in the destruction.

Brainstorm is a grab-like with two claws and six legs. He has a high intelligence, being able to perform several complex calculations mentally, knowing e.g. the exact trajectory of a projectile at mid-flight; has the ability to control electrical energy, project force fields around him and others through thought and magnetic energy waves, accomplished by opening the exoskeleton plates on his skull, showing his brain or create electricity from his pincers without needing to open his skull plates as well; he also has the power to levitate; and cause a storm just by thinking. In this form, Ben speaks with much greater diction and with a British accent, also the species tends to be selfish which makes them forget how to do simple things as seen in "Vengeance of Vilgax" where Brainstorm forgot to capture a wild Spidermonkey due to its cocky attitude, they also tend to use large, scientific or intelligent terms that may not be understood by those they are talking to. Brainstorm's electro blasts can be grounded and a weak spot is at its brain, when struck him experiences excruciating and unbearable mental pain, which is probably why the species developed the casing. He was first seen in "Pier Pressure", to face Ship, but Brainstorm was an accidental transformation.

All aliens in Ben 10: Alien Force and Ultimate Alien have the Omnitrix/Ultimatrix symbol on their chest except for Brainstorm, who has it in his cephalothorax.

Brainstorm appears as a playable alien form in "Ben 10 Alien Force: Vilgax Attacks", and "Ben 10 Alien Force: The Rise of Hex".

Spidermonkey

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Spidermonkey is an Arachnichimp (a play on arachnid and chimpanzee) from the planet Arahnascimmia (which is also called "Arachna"). As the species name suggests, Arachnichimps are six-limbed monkey-like aliens with four eyes and blue fur which live in villages built onto tree canopies to evade the numerous predators that live on the ground below. Other than superhuman agility and able to latch to any surface, Arachnichimps can shot webbing from from their tails. Ben first accessed the form of Spidermonkey in "What Are Little Girls Made Of?" to face his grandma Verdona.

Ultimate Spidermonkey

As Ultimate Spidermonkey, he is a bulky purple gorilla-like alien with four sharp spider legs sprouting from his back, and he had lost his tail and his extra arms. In this state, Ultimate Spidermonkey is stronger and can spit webs from his mouth, in larger amount, which are very tough and is waterproof. He was first seen in the pilot episode of Ben 10 Ultimate Alien, to fight Bivalvan, being the first ultimate form of Ben 10: Ultimate Alien.

Spidermonkey appears as a playable alien form in "Ben 10: Alien Force The Game" (Only for Wii, PS2 and PSP versions), "Ben 10 Alien Force: Vilgax Attacks", "Ben 10 Alien Force: The Rise of Hex" and "Ben 10 Ultimate Alien: Cosmic Destruction" with Ultimate Spidermonkey.

Goop

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Goop is a Polymorph (a word meaning "many shapes") from the planet Viscosia (a play on viscosity).

He is a 200 pounds viscous life form, shape-shifting, green goo, also made of acidic, controlled by an anti-gravity generator developed by Galvans, that resemble a small UFO, where his voice comes, and also has sharp edges. This device allows him to take any shape and levitate; however, if the ship and the slime are separated by even a short distance, the slime will become inert until the ship recollects it, and also it has a button that shuts off the anti-gravity. Goop first appears to battles a Techadon in "The Gauntlet".

In "Deep" Goop used his anti-gravity projector to keep the Piscciss planet's gravity, and he kept his generator there, even when Ben turn to human form, Dwayne McDuffie says the Ultimatrix will generate another anti-gravity projector; he also said that the original species of Goop did not use a projector.

Goop appears as a playable alien form in "Ben 10: Alien Force The Game" (Only for DS version), "Ben 10 Alien Force: Vilgax Attacks", and "Ben 10 Alien Force: The Rise of Hex".

Alien X

Ben is voiced by:

Bellicus is voiced by:

Serena is voiced by

Alien X is a Celestialsapien ("celestial" referring to a supernatural being and "sapien" meaning "wise" in Latin), possessing a black humanoids body resembling space with tiny white stars, black hands, green eyes, and three horns protruding from the head. Celestialsapiens originate from the Forge of Creation outside the known Universe, though some also live in the Milky Way. Though Celestialsapiens are capable of warping reality at a whim, they are all usually in an inactive state of internal debate on how to manipulate time and space due to two conflicting personalities: Bellicus, the voice of rage and aggression, and Serena, the voice of love and compassion. As Serena and Bellicus have been arguing for eternity, they are usually unable to agree on anything except in the case of Paradox as they both hate him to the point of allowing him to exist only if he stayed "500 light years" far from them, or any Celestialsapien.

Alien X is the tenth alien that Ben becomes after his Omnitrix was reformated when he stops a dam that had burst in "X= Ben + 2", becoming a metaphysical medium for both Beliacus and Serena to settle their debates as their voice of reason while physically unable to move as Alien X. When none of his ideas worked, Ben gave them the idea to let him become a different alien to fight the Incursions. Since then, though he acknowledges Alien X as one of his most powerful aliens, Ben cannot afford the cost that comes with assuming the form with him being frozen in place by the personas' debate being one of the reasons. After getting the Ultimatrix, Ben had a security protocol that lock on the Alien X option to ensure the form would not be used if the item fell into the wrong hands and that he would not accidentally turn into it, Gwen and Kevin have the keys that undo the protocol. Ben had this undone in order to get Bellicus and Serena to help him to find the Forge of Creation and stop Aggregor, which didn't worked. Paradox ended up getting Ben out of his Alien X form after the boy's attempt to reason with the two personalities fails prior to them realizing Paradox's presence and were about to vaporize him upon a quick mutual agreement.

Alien X is featured in the video game "Ben 10 Alien Force: Vilgax Attacks." He is first mentioned by Paradox during the invasion that now would not be a good time to use Alien X. When Psyphon steals the energy core from Ben in order for Vilgax to send Ben into the Null Void, Paradox appears telling Ben that now is the good time to use Alien X. When Ben becomes Alien X, he tells Bellicus and Serena that if they do not help him stop Vilgax, the Earth will be destroyed with them alongside it. Alien X manages to deflect the Null Void beam back at Vilgax and Psyphon sending them into the Null Void.

Lodestar

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Lodestar (a play on lodestone, a magnetic rock) is a Biosovortian.

Lodestar has a floating metal head which levitates between his pointed shoulders, which are held in place magnetically and his mouth doesn't move, has crab-like claws just like the claws on his feet. He has magnetic powers, being able to create magnetic fields, enabling him to repel, attract, emit magnetic pulses, and control metallic objects; and also attack using magnetism waves; he has an armored hull, very tough, but does not support an explosion, in the other hand, he can regenerate itself; and also he can make a shield and fly.

At the end of "War of the Worlds Part 2" when the Omnitrix resets itself after Ben reprograms the DNA of the Highbreed, it had unlocked new aliens, Ben transformed him, but he didn't been seen, just his hologram. His official debut was in "Simple" to defeat the Red Army.

Lodestar appears as a playable alien form in "Ben 10 Alien Force: The Rise of Hex".

Rath

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Rath (a play on "wrath") is an Appoplexian (a play on apoplexy, a part of the brain that deals with anger) from the planet Appoplexia.

His appearance is a large, muscle-bound, humanoid tiger-like alien with no tail. However, unlike tigers who are known to be intelligent, patient and cunning creatures, Rath's species suffer from aggressive temperament and decreased intelligence, having a need to fight anything that breathes, making him just as likely to attack or provoke his friends as well as his foes and as a result alters Ben's personality the most among his aliens, become easily distracted and difficult to stop once he starts fighting. Rath always refers to someone by using both their first and last names regardless of the situation and his mannerisms and speech are reminiscent of a professional wrestler and has a tendency to say Lemme tell ya somethin'!, similar to Hulk Hogan, then followed by the full name of whoever he's talking to, and also refers to himself in the third person. He knows that his metaphorical statements make no sense, but continues to use them. He is very direct and fearless to the point of recklessness; also his apparent lack of intelligence also may convince him to needlessly argue with inanimate objects.

However, Rath is more than able to back up his threats and is one of Ben's most powerful aliens, as his species is gifted with enough physical agility and strength to easily lift objects far larger than him and pummeling most of Ben's enemies with ease, showing that his abilities to fight, depends better with the anger, making him to be determined to fight. In addition, Rath has two retractable claws on his wrists that can generate shockwaves when driven into objects and he is also durable enough to survive for short periods in space and take a powerful laser cannon blast at point blank range without even flinching or reacting.

He was first introduced in "The Con of Rath" (a play on "Wrath of Khan") when the crown prince Tiffin sets off the Omnitrix's circuit, and caused it to keep Ben in that state for the whole episode until Tiffin leave, and when he found out that Kevin knew about all the time, he turned back him to beat him up.

Rath appears as a playable alien form in "Ben 10 Ultimate Alien: Cosmic Destruction" (Only for Xbox 360 version).

Aliens introduced in Ben 10: Ultimate Alien

Nanomech

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Nanomech is a Nanochip/human hybrid being, part drone, part human.

It's worth noting he is drastically different than the source alien, which are bug-like, while Nanomech takes more on a humanoid shape. He has the ability to fly with his wings for added maneuverability, which glows when he flies; shoot energy balls from his hands and his eye; and also he is the opposite of Humungousaur, Nanomech can also change his body size to a microscopic size to adapt to any situation, but can't grow any bigger size. However, being a part of the chips' hive mind renders him vulnerable to the Queen's link to the other chips; however, unlike the drones, he retains his individuality.

In Ben 10: Alien Swarm, Nanomach was unlocked by scanning the Nanochips. He was used to enter Victor Validus's brain and battle The Queen; Ben destroyed her and thus the entirety of the chips, freeing everybody from their control.

He first appears in Ben 10: Ultimate Alien episode "Video Games", with his appearance and voice changed; he would be in a supposed video game he was going to appear in, but Nanomech was regarded too small for the video game. Later in the same episode, he was used to tear apart the insides of Will Harangue's robot.

Water Hazard

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Water Hazard is an Orishan (A play on oyster) scanned from Bivalvan in "Fame".

Water Hazard is a red, crustacean-like alien of bivalve origin. He is able to shoot pressurized water from his palms, as well as absorb ambient moisture from the air by manipulate the water; has a highly durable armored exoskeleton which protects his body from most types of damage, including moderate amounts of radiation; has enhanced strength and can breathe underwater for a period of time. Water Hazard first appeared in "Too Hot to Handle" to pretend to be Bivalvan and convince P'andor to leave Earth, but did not work because of the rivalry between P'andor and Bivalvan.

Water Hazard appears as a playable alien form in "Ben 10 Ultimate Alien: Cosmic Destruction".

AmpFibian

Voiced by:

AmpFibian is an Amperi (derives from the term ampere, an SI unit of electric current) scanned from Ra'ad in "Fused".

AmpFibian is a blue jellyfish-like alien with six tentacles. He has the ability to generate and drain electricity from his tentacles; can sense the electrical pulses in the minds of other life forms, allowing him to read their thoughts; turn intangible, stretch all of his tentacles, and absorb and redirect energy beams. AmpFibian can also travel through air, water, and electronic currents by turning his body into electricity.

Though unintentionally first used in "Fused", where Ra'ad entered Ben's body during the DNA scan in a freak accident in an attempt to take the Ultimatrix offline to evade Aggregor; which explains that the first time, he had blue eyes and had a voice that sounds just like Ben's but it has the effect of being phase-shifted because of Ra'ad. The first intentional use was in "Deep", to breathe under water on the planet Piscciss, where this time he has green eyes.

AmpFibian appears as a playable alien form in "Ben 10 Ultimate Alien: Cosmic Destruction".

Armodrillo

Voiced by:

Armodrillo is a Talpaedan (a play on talpidae, a name for a family of mammals that includes subterranean animals such as moles) scanned from Andreas in "Andreas' Fault"; from the planet Terraexcava (from Portuguese Terra Excava means "Excavated ground").

Armodrillo is an armored robotic armadillo-like alien with a head that looks similar to a Greek Corinthian helmet. He has an invulnerable armor that protects him from most of damages; has two jackhammers-like arms, that has the ability to drill into the ground, or form jackhammers that cause tremors, shock waves and earthquakes; he is also very strong, being able to split the ground in half. Despise all this mechanical appearance, they are biological and natural. Ben first used Armodrillo to defeat Computron and the robots from the Dimension 12 released by Captain Nemesis in "Hero Time".

Armodrillo appears as a playable alien form in "Ben 10 Ultimate Alien: Cosmic Destruction".

Terraspin

Voiced by:

Terraspin (a pun on the turtle terrapin) is a Geochelone Aerio (a play on Geochelone, a turtle found in Africa, Asia, and the USA, and "Aerio" a play on air) scanned from Galapagus in "Escape From Aggregor"; from the peaceful planet Aldabra (a pun on the island of the Aldabra Group).

Terraspin is a turtle-like alien with holes in chest, and big flat flipper-like arms with retractable claws that can be used as fingers. He has the ability to shrink his head into his shell, with an opening over the shell that serves as a viewfinder, his fins become triangular and his legs combine into a similar triangular shape and blow a powerful wind from his holes in its forward using his arms and propellers; allowing varied powers such as creating winds and spinning himself in high-speed; he uses the blowing ability for fly, has super-human strength, and also his species is impervious to mana. Ben first used him to destroy an alien artifact that became robot accidentally activated by Cash in "Reflected Glory".

Terraspin appears as a playable alien form in "Ben 10 Ultimate Alien: Cosmic Destruction".

NRG

Voiced by:

NRG is a Prypiatosian-B (a play on Prypiat, a city that was evacuated due to a Chernobyl disaster) scanned from P'andor in "Too Hot To Handle".

NRG is a radioactive energy being with Russian accent, encased within an oven-like invulnerable containment suit that contains his radiation. When released, he is able to shoot energy beams and can create intense heat, enough to create the intensity of a nuclear bomb; he is capable of becoming intangible, so he cannot be touched except by the material his armor is made of. His armor is so tough that can only be broken with a sharp piece of Taedenite; but even trapped in the armor; he can still use part of his power when is released, can shoot energy beams through the holes of the viewfinder, and can generate intense heat, being able to create magma; and have the super-human strength. Ben first transformed into NRG by accident to defeat the 10-year old Ben as the original Heatblast in "The Forge of the Creation".

NRG appears as a playable alien form in "Ben 10 Ultimate Alien: Cosmic Destruction".

Fasttrack

Fasttrack ('Fast' for speed or 'Velocity' which was his working title and 'Track' for road or path) is a Citrakayah(A play on Citroen, a motorvehicle company) from the planet Chalybeas(From "Chalybeate" mystical waters containing salts of iron possesed by the extinct "Chalybes" community in accordance to the enchanted strength element) who made his first on-screen appearance in "Basic Training" where he saves Tack and Magister Hulka from a malfunctioned grenade, though he was first used by Ben off-screen. His name was not revealed during the episode due to the fact that he was transformed into between commercials, but the writer of episode "Prisoner Number 775 is Missing" confirmed the name, species, and home world.[3] He has superspeed and possible superstrength, as he was able to lift both Magister Hulka and Tack, a fellow plumber-in-training. Revealed in the upcoming Ben 10 racing game Ben 10: Galactic Racing, his voice sounds like Spidermonkey. Fasttrack will make a non-cameo appearance in "A Knight to Remember". Then, he appeared in "Solitary Alignment". It is confirmed by that he's faster then XLR8. He also has enchanced strength.

Clockwork

Clockwork (named after Clockwork, the inner workings of a clock) is an alien Ben 10,000 used in "Ben 10,000 Returns" and has been confirmed by Bandai to appear in Ultimate Alien, and the "Fourth Series". His physical appearance has yet to be shown as he was only used through Ben 10,000's Ultimate Ben, but a hologram showed a structure similar to NRG's with a sort of half circle with a concave center above his head, which is a sort of flat head also like NRG's. He can time travel and fire a powerful time beam/blast from his chest. He will appear in "Inspector #13"

ChamAlien

ChamAlien(A pun on Chameleon and 'Alien') is a Merlinisapien (a pun on "Merlini," a frog term, and "Sapien," meaning wise or intelligent in Latin) from the planet Sauria(Meaning a clade of Lizards somehow related to Humoungasaur only short of the "growing" element) which was destroyed about five decades prior to the events in "Prisoner #775 is Missing"). He was first seen at the end of "Prisoner #775 is Missing" after scanning him from Prisoner #775, He was jokingly dubbed Overkill by Ben(A suggestion by Gwen earlier in the episode when Ben overdid or rather "Overkilled" the concept when he shouted Swampfire's name when he used him only to light a bonfire), but his name is confirmed to be ChamAlien. He has the ability to scale up walls, the ability to camouflage himself and grow a stinger on the tip of his tail and even posseses superstrength for he was able to push a truck at high speed towards Humoungasaur. He returns in the "The Flame Keepers' Circle" where he sneaks in to find out the truth about Dagon, which turned out to be Vilgax.

Shocksquatch

Shocksquatch (A play on "electric shock" and "Sasquatch") is an alien with the ability to utilize electricity, similar to the Yeti from "Escape from Aggregor" though with a more gorilla-like appearance with the fur of a vervet monkey. He has small metal plates on his lower jaw and the back of his hands that he uses for his powers,allowing him to conduct the electricity he creates. He uses the plates to create great friction, which generates sparks and thus causes lightning. He briefly appeared in the Heroes United crossover due to the Alpha nanite hacking the Ultimatrix a couple times in the special.

Eatle

Eatle (a pun on "eat" and beetle) is an unknown species form an unknown planet. He is a dark blue, robotic, shark-like alien with a big fin on his head. His abilities allow him to eat anything. He has super strength and durability, although Ben's first time transforming into him was short because Eatle was knocked out due to being caught off guard. He first appears in "A Knight to Remember" to fight Vilgax.

Jury Rigg

Jury Rigg (a play on "jury rigging") is an alien confirmed to appear sometime in Ben 10: Ultimate Alien.[4] He is a red, devil-like alien with a big nose, big ears, and a tail. His powers have to do with technology and "mechanical mayhem" and allow him to bring machines to life and use teleportation similar to a gremlin.It is confirmed Jury Rigg will debut in an episode battling Dr.Animo.

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