List of Ben 10 aliens

"XLR8" redirects here. For the computer upgrade, see Daystar Technologies.

This is a list of aliens stored within the fictional Omnitrix device in the American animated television series Ben 10.

Original alien forms

In the first season, only ten selectable aliens were on the Omnitrix. Other forms seem to be hidden, requiring specific circumstances to unlock them.

Fourarms

Ben's preferred offensive form is Fourarms (voiced by Richard McGonagle), a Tetramand (tetra meaning "four" in Greek, mand being "arms" in Latin) from the planet Khoros. Khoros is a harsh desert planet with a nomad population having risen in place of a once thriving confederation of city states, resulting in the strength-oriented Tetramands.

Tetramands are giants compared to most species, standing ten feet on average. The harsh wasteland of their home planet has turned the Tetramand race into physical powerhouses, a trait carried over to Fourarms. Possessing four arms, four eyes, armor-plated skin, and extremely dense musculature, Fourarms is rarely matched in raw strength. His strength is such that he can create shockwaves simply by smashing the ground or clapping all four hands together, dubbed the "Big Smack". Fourarms' muscular legs also allow him to leap several city blocks at a time.

In spite of his strengths, Fourarms' dense muscles are also his weakness. Built for power instead of speed, Fourarms is at a disadvantage against faster or smaller opponents. This also forces a dependence on his armored body, as he is incapable of dodging quickly. His size also makes it difficult for him to use things designed by smaller species. Buildings, especially, are a problem for Fourarms, since he usually cannot fit through doors or in rooms. Controlling his own strength is also a problem, and much of the damage he causes is often unintentional.

Fourarms is the most used alien in the series, since it is the form that most suits Ben's fighting style: blindly rushing at the enemy with little forethought. Ben first transformed into Fourarms in "Washington B.C." when he needed to fight the giant mammoth that Dr. Animo had reanimated.

Ghostfreak

Ghostfreak (voiced by Steven Blum) is an Ectonurite (ecto playing on ectoplasm) from the planet Anur Phaetos (phaetos playing on phantom). The series is vague about the conditions of Anur Phaetos, aside from it being quite dark. Some urban legends claim it to be the source of galactic chaos, while others identify it as a dimensional realm instead of a planet. Ectonurites seem to be part of a hive mind; as the species possesses a vast genetic memory, this mind is embedded into every strand of DNA and can be used to replicate that mind in its entirety.

As an Ectonurite, Ghostfreak resembles a wraith-like genie, while the original version presented in the series is closer to a classic ghost. Ghostfreak has an exposed and upside-down skull for a head, a single eye, dark blue-gray skin, exposed bones on certain parts of his body, and blue claws. Beneath his skin is a mass of black and gray tentacles, which can either be used as extra appendages or to scare an opponent, the latter keeping with his name. In total darkness, these features become even more pronounced. When first introduced, Ghostfreak has a second skin that gives him a primarily grey and white appearance while hiding his more frightening features, giving him his more ghost-like appearance.

In battle, Ghostfreak possesses a wide array of powers, the foremost among them being intangibility and invisibility. Being made of a variable-density protoplasm, Ghostfreak can alter his own body chemistry to pass through solid matter or allow light to pass through himself, becoming invisible. He can also make others intangible through physical contact. As suggested by his appearance and name, Ghostfreak can levitate freely and his physiology allows him to survive without air. Finally, Ectonurites also have psychic abilities such as telepathy and telekinesis, but the extent of these abilities remains unclear. The episode "Ghostfreaked Out" shows the only example of this; Ghostfreak, from within the Omnitrix, causes several glass beakers to explode and causes other such minor chaos. He was also able to communicate with Ben telepathically, both through dreams and minor hallucinations.

Due to their perpetually nocturnal lifestyles, Ectonurites have developed into extremely photosensitive creatures. Intense light, especially sunlight, renders Ectonurites powerless and will cause them to combust with prolonged exposure. The second skin on the original version nullifies this weakness, but has since been removed.

Ben first transformed into Ghostfreak in "Permanent Retirement" when he wanted to get away from his Aunt Vera. Starting at some point beyond that, Ben has had nightmares involving Ghostfreak, making Ghostfreak one of the lesser-used forms. This version of Ghostfreak retained Ghostfreak's original personality in the strand of DNA taken as a sample. Ghostfreak eventually forces his way free in "Ghostfreaked Out", removing Ben's ability to use the form in the process. Ben regains the form in "Be Afraid of the Dark", but as a natural Ectonurite, not the sunlight-shielded version. Whether this version retains the personality of its source is unclear.

Grey Matter

Grey Matter (voiced by Richard Steven Horvitz) is a Galvan (the former a play on actual grey matter and Greys, the latter a play on galvanization) from the planet Galvan Prime. Galvan Prime is a tiny world by most standards (the series does not give a definitive measurement), and hence Galvans are on average about five inches tall.

Galvans are bred to be naturally intelligent and intuitive, learning quickly about any given object from just a simple glance. Their bodies are designed for the same purpose: soft, flexible bones and slimy skin allow Galvans to squeeze into all but the smallest of spaces. It also makes grabbing them somewhat difficult. Their slimy skin also allows them to stick to most surfaces. Regardless, Grey Matter is easily stomped on because of his small size. Not built for combat, Grey Matter evades and outsmarts his enemies, rather than fighting them head on. As Grey Matter, Ben benefits from the form's specialized breeding, giving him the ability to instantly understand any technology. Showing a more light-hearted side of the Omnitrix, Ben, despite being able to understand any device, does not consciously comprehend what he is doing, leading him to remark as much.

Ben first transformed into Grey Matter in "Washington B.C." when he saw that a gold Sumo Slammer card could be found in a box of cereal. Gwen found him looking for the card in the cereal boxes at the supermarket. Since then, Grey Matter has been his form of choice when needing to be stealthy or intelligent, but has also been a popular target for accidental transformations, such as in "A Small Problem".

Heatblast

Heatblast (voiced by Steven Blum) is a Pyronite (pyro meaning fire) from the star Pyros. Pyros, despite being a fully-functioning sun, has enough plots of semi-solid land for Pyronites to exist. Having evolved on a star, Pyronites are magma-based creatures that can project and control heat at will.

The primary trait of Pyronites is their control over heat, which manifests in a variety of ways. From projecting bolts of flame, radiating heat in all directions, or even firing at the ground to propel himself like a rocket, the heat-manipulation powers of Pyronites can produce a nearly-unlimited range of effects. This tends to make Heatblast's scenes some of the more spectacular ones in the series. Apart from this, Heatblast is also a highly durable alien, able to endure being thrown through buildings without being slowed.

However, Heatblast's natural abilities also necessitate care when handling people or other things that do not react well to intense heat. As Heatblast cannot reduce his ambient temperature to human levels, he cannot directly rescue people or remain in contact with objects for anything longer than a few seconds without lighting them on fire. Heatblast gets around this by creating vortexes of flame to transport things without actually touching them. In addition, Heatblast himself is vulnerable to things that extinguish flame, namely water, sand, or foam. While small amounts of such materials simply evaporate, large amounts over an extended period can kill a Pyronite.

Heatblast is Ben's first transformation, which was activated in "And Then There Were 10" when Ben was tampering with the Omnitrix.

Ripjaws

The aquatic alien Ripjaws (voiced by Fred Tatasciore) is a Piscciss Volann (possibly a play on "vorare", meaning "to prey upon") of the water planet Piscciss (a play on "Pisces", Latin for fish). Part alligator, part eel, part anglerfish, and part leech, Ripjaws is almost unmatched when in his element.

Being from a water-covered world, Ripjaws' foremost asset is his ability to breathe underwater. As the form best equipped for underwater combat, Ripjaws is usually Ben's way to deal with aquatic opponents. Possessing a powerful tail and slimy scales, Ripjaws can swim at high speeds and with amazing agility. Ripjaws can also withstand a remarkable amount of pressure, and his luminescent dangler allows him to see in the darkest of depths (or otherwise dark areas). To attack his opponents, Ripjaws has claw-tipped fins and a huge mouth filled with rows of razor-sharp teeth. His lower jaw can unhinge to allow him to swallow objects in a single bite.

As a downside to being an aquatic alien, Ripjaws is rendered almost useless out of the water, requiring almost constant exposure to water to keep from rapidly dehydrating, causing him to suffocate on dry land. Ripjaws has a pair of legs hidden within his tail, allowing him to move on land, but is still subject to the necessity for water.

Ben first transformed into Ripjaws in "The Krakken" in order to take the Krakken's eggs back from Jonah Melville. Due to the extremely specific conditions required to maintain Ripjaws, he has become more of an auxiliary alien. As such, he is one of the least-used forms on the Omnitrix (being absent for the entirety of the third season).

Stinkfly

Another of Ben's more commonly used forms, Stinkfly (voiced by Dee Bradley Baker) is a Lepidopterran from the planet Lepidopterra (a play on lepidoptera, the scientific name for butterflies and moths). Lepidopterra is a swamp planet home to a wide variety of giant plants, and hence much larger insects evolved to match. Meant to be a combination of various Earth insects (dragonflies, crickets, and praying mantis' specifically), Lepidopterrans are an intelligent insectoid race that reside in a complex of giant hives, each ruled by its own queen.

In any situation requiring flight, Stinkfly is Ben's alien of choice. Stinkfly's thin, rapidly flapping wings allow him to move at high speeds in the air and dodge attacks just as quickly. Stinkfly also possesses disproportionate strength, enough to carry people and objects heavier than himself. Stinkfly's four eye stalks give him a wide range of vision from the sky, including the ability to look directly behind himself.

For attack, Stinkfly can excrete high-pressure streams of liquids from the pollen ducts in his eye stalks and mouth. The type of liquid can range from a flammable toxin to an immobilizing jelly. In "Don't Drink the Water", Ben's child form of Stinkfly (Stinkyfly) could emit a powerful herbicide gas through flatulation. For melee combat, Stinkfly has a razor-sharp tail and four pincers for legs.

Like most insects, Lepidopterrans are extremely vulnerable to any kind of chemical poison or gas. Although their exoskeleton bodies are fairly strong, their wings are extremely fragile and easy to damage. Water especially is a problem for Stinkfly; it can render him incapable of flying if too much gets on his wings. Furthermore, he is unable to swim due to the small surface area of his limbs. A more minor inconvenience is Stinkfly's intense body odor (hence the name).

Ben first transformed into Stinkfly in "Washington B.C." when he had to save Gwen after she fell from the Washington Monument.

Upgrade

Upgrade (voiced by Tara Strong) is a Galvanic Mechomorph (mecho- meaning machine and -morph meaning transform) of the planet Galvan B, a formerly uninhabited moon orbiting Galvan Prime. Though originally uninhabited, Galvan B was accidentally brought to life when Galvan scientists introduced self-replicating nanotechnology to the moon, which bonded with the moon's minerals and created sentient life. Galvanic Mechomorphs are built from the nanotechnology that covers their planet.

Upgrade is a biomechanical being with liquid metallic skin and complex systems of self-forming organic circuits. Made of liquid metal, Upgrade can reshape his body into various forms, though he never takes any non-humanoid form. It also allows him to stretch his body to an extent, allowing him to glide or float like a hang-glider or parachute and fashion crude weapons with his hands, such as a mace. As Upgrade can "melt" to avoid harm, most standard projectile weapons are ineffective against him, and Upgrade will quickly regenerate from any damage taken. The same ability also allows him to escape most forms of capture, such as being held down or tied up. He also doesn't need to breathe.

Upgrade's reshaping ability allows for his primary power: made of nanotechnology, Upgrade can merge with and upgrade any technology within reach by spreading over it like liquid, enhancing it far beyond its original design. The size of the device is inconsequential. While merged with a device, Upgrade controls it as he would his own body. Through the same principle, Upgrade can also slide across metallic surfaces and travel inside wires. Even without a machine at hand, Upgrade can reconfigure his form around his eye in order to fire a plasma beam from it. Upgrade is also capable of forming simple constructs from plasma, such as spikes.

Upgrade's weakness is his specialization: being technology-oriented, Upgrade cannot possess biological creatures. Sentient robots are more difficult for him to control. Upgrade's liquid-metal composition can work against him, namely where electrical attacks are concerned. Furthermore, any sort of metal corrosive can upset Upgrade's delicate internal workings and wreak havoc on his systems.

Ben first transformed into Upgrade in "Permanent Retirement" to stop some criminals who were robbing an ATM.

Wildmutt

Wildmutt (voiced by Dee Bradley Baker) is a Vulpimancer from the planet Vulpin (a play on vulpine, which means fox). Vulpin is a pitch black planet at the edge of the galaxy, used as an intergalactic dumping ground. The ecosystem of the planet has been poisoned beyond repair because of this, and as such the few creatures that survive here do so under subzero temperatures. Vulpimancers are one of the few creatures to survive on Vulpin, and are no less mutated than the planet itself.

Ranging from human size to several times that, Vulpimancers share few common characteristics. Their only common feature is the general shape of their bodies, being a cross between a lion and a gorilla. Ben 10,000's Wildmutt has much more pronounced feline traits, including stripes and a tail. This unique body setup allows Wildmutt to run, jump, and climb objects at high speeds, in addition to making him fairly strong. Being from a pitch black world, Wildmutt has no eyes, instead having evolved to see through smell and hearing, which is depicted as functioning somewhat like a thermograph sensor. From sound to heat, few things escape Wildmutt's radar-like sight.

According to various profiles on Wildmutt, the porcupine-like quills on his back supplement his senses, acting as finely tuned sense receptors. They are also said to serve as weapons. They can either protect Wildmutt while he's rolling or be fired off as projectiles. The series has not yet addressed this particular ability; furthermore, Gwen has no trouble riding on his back on several occasions.

Because they have no eyes, Vulpimancers do have some trouble with finer movement, and under certain conditions are unable to detect their enemies. Vulpimancers, Wildmutt included, are also unable to speak in any understandable fashion, instead relying on snarls and growls, which can be an inconvenience when trying to avoid conflict. Because he relies on his sense of smell and hearing to see, Wildmutt is sensitive to loud noises and strong smells. He is also rendered useless if his nose or ears are clogged.

Ben first transformed into Wildmutt in "And Then There Were 10" after his second experiment with the Omnitrix. This was Ben's first intentional transformation.

XLR8

XLR8 (voiced by Jim Ward) is a Kineceleran (a portmanteau of the words 'kinetic' and 'accelerate') from the planet Kinet (the first part of kinetic, which is movement energy). Kinet is an electrically charged world, where electrical storms rapidly orbit the sun and everything is accelerated. Like their homeworld, Kinecelerans are accelerated, and live their lives just as quickly.

While XLR8 resembles a semi-armored velociraptor, the base creature for the form's design, the actual species is described much differently in the Bandai profiles. The profile states that Kinecelerans are vaguely elfin in appearance, with long hair, blue skin, pointed ears, large tails, and oversized feet. XLR8, on the other hand, has wheel-shaped feet and wears a helmet with a windshield. Ben 10,000's XLR8 also has a scanner built into the helmet, though whether or not Ben has a similar ability is unclear.

Like all Kinecelerans, XLR8 can move at speeds reaching 500 mph, and can reach such speeds almost instantly. This extreme speed comes from manipulating friction, which allows XLR8 to run on almost any surface, including water or walls, with ease. The Bandai profiles also create another contrast with this ability: actual Kinecelerans are said to be incapable of running on slippery surfaces. Furthermore, because of their constant motion, Kinecelerans build up large stores of static electricity, which reacts badly with water. XLR8 has showed no such ability.

Using his speed, XLR8 can perform a number of unique feats. He can create tornadoes through centrifugal force, either through running in a small circle or spinning, and can deliver speed-enhanced attacks in rapid succession. Amazing reflexes accompany this speed, allowing XLR8 to quickly dodge attacks with relative ease. His scissor-like claws can also cut through objects.

XLR8's weakness is his lack of physical strength, which is about on par with a normal human. Magnets and charged pulses are also said to be a problem, apparently disorienting Kinecelerans to the point that they cannot balance properly, but the series has never addressed this weakness.

Ben first transformed into XLR8 in "And Then There Were 10" when he decided to play around a bit with his newfound power. He used the form to get revenge on some bullies that he fought with earlier in the episode. By the possible future seen in "Ben 10,000", XLR8 becomes Ben's most-used form; having unlocked the Omnitrix's master code, Ben reverts into XLR8 rather than his human form whenever he is not fighting.

Additional alien forms

In the second season, Ben begins discovering new alien forms as a result of random transformations. Accessing these aliens seems to be more difficult than the first ten forms, but become simple to access after the first transformation. During the third season, Ben gains access to new alien forms from the Omnitrix's ability to absorb and integrate alien DNA upon contact.

Benmummy

Benmummy (voiced by Richard Green) is a mummy-like alien composed almost entirely of a bandage-like material, akin to the linen used on real mummies. They can stretch their bandages to great lengths and control them even when separated from its main body. This setup also allows them to reshape their bodies at will, splitting themselves apart to dodge attacks and reforming to counter-attack. However, the material that makes up their body is relatively weak, allowing it to be torn fairly easily by strong enough beings or other equivalent forces. To compensate for its relatively weak form, these aliens can recover from basically any injury, including being torn to shreds, almost instantly and with no visible repercussions. When Ben first uses the form, he has 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.

Benmummy's bandages make him extremely light, allowing him to be thrown by beings with human strength or blown away by strong enough winds. Despite his build, however, Benmummy is incredibly strong, and can throw beings as heavy as Diamondhead with little effort. In addition to strength, Benmummy also has a surprising amount of speed and agility (enough to scale walls and dodge attacks with relative ease). His composition also allows him to survive in a vacuum.

Benmummy's appearance differs slightly from the other mummy alien seen. His eyes and the gaps between his bandages glow green instead of purple. Benmummy also has black bracers and greaves, as well as a smaller mask and the Omnitrix symbol on his left shoulder. Benmummy can speak, even though the original seems to be mute.

Ben gains this form in "Under Wraps" when another mummy alien inadvertently adds its DNA to the Omnitrix. Ben first uses the form in "The Return" to fight off the Yenaldooshi. The credits give the name "Benmummy," though Ben has not named it yet on-screen.

Benvicktor

Benvicktor (voiced by Michael Dorn) is an alien who appears to be based on Frankenstein's monster from Mary Shelley's Frankenstein. Rather than sharing the same gruesome composition, though, Benvicktor's species appears to be robotic. This allows them to survive in vacuums and enhance themselves with mechanical devices. Like his species, Benvicktor has the ability to generate and project a lightning-like stream of energy, which is capable of travelling through a vacuum without a conductor. This also gives him the ability to magnetically charge his metal body in order to stand firmly on metal surfaces. The metal body makes Benvicktor strong and durable.

Benvicktor looks slightly different than Doctor Vicktor, the source alien. Benvicktor sports longer hair, a smaller left eye (Vicktor's appears to be mechanical), and generates green lightning rather than purple.

Ben first gains this form while battling with Doctor Vicktor in "Be Afraid of the Dark", during which time Vicktor accidentally grabs the Omnitrix. Ben uses the form later in the same episode to fight Ghostfreak. The credits give the form's name as Benvicktor, even though Ben himself has yet to name it.

Benwolf

Benwolf (voiced by Tara Strong) is a Loboan (as in Lobo, Spanish for wolf) from the planet Luna Lobo (literally translating from Spanish as "Wolf Moon," a reference to his being a werewolf of sorts). In keeping with his werewolf appearance, Benwolf has both enhanced strength, speed, and agility. He also has canine-like senses more acute than that of humans; like canines, however, Loboans are colorblind. Benwolf's primary weapons are his claws and fangs. Like other Loboans, Benwolf has a quadri-hinged mandibled mouth akin to that of a Sangheili. By opening his mouth completely, Benwolf can emit a long-range, ultrasonic howl, which is capable of doing concussive damage. This howl is capable of shattering rocks and can propel Benwolf through the air using recoil if need be.

Ben obtains this form in the episode of the same name after an alien of the same species scratched the Omnitrix, causing its DNA to be added into Ben's selection of aliens. Unlike his other transformations, Ben gradually transforms into Benwolf rather than changing instantaneously. During this transformation, Ben displays several animalistic tendencies, such as scratching with his leg. Whether this carries over to Benwolf is unclear due to his limited appearances.

Cannonbolt

Cannonbolt (voiced by Fred Tatasciore) is an Arburian Pelarota (based on pelota, Spanish for "ball" and rota, a play on "rotation"). This species is now mostly (if not completely) extinct. The Great One destroyed their planet shortly before Ben discovers the form.

Cannonbolt is a hulking, broad-shouldered alien covered in natural armor plating on the back, shoulders, and the backs of his arms. Cannonbolt can roll into a ball like an armadillo or pillbug to encase himself in this plating. There is enough space within the shell while rolled up to protect and transport people or objects. When in ball form, Cannonbolt can increase his rotational momentum and roll into enemies as an attack, as well as ricochet off surfaces. However, he is subject to the physical laws of reflection and conservation of momentum, meaning that he has difficulty stopping or controlling his direction if he picks up speed.

Cannonbolt's armored shell is extremely resistant. The plates are safe from corrosives and will reflect energy-based attacks. The shell is durable enough to survive a free fall from the upper limits of the Earth's atmosphere, including the heat of atmospheric reentry, and still leave Cannonbolt and anything inside its shell completely uninjured.

When not using his abilities, Cannonbolt is extremely clumsy and slow. His bulk, high center of gravity, and stubby legs restrict his movement and make balancing difficult, frequently causing him to fall on his back or face. However, recent episodes show Cannonbolt running, and even jumping, suggesting that Ben is now more adept at balancing as Cannonbolt.

The information from the Bandai Alien Collection toy for Cannonbolt is somewhat contradictory to that given in the show. The profile that comes with the toy refers to his species as a Vulpinic Tortugan (tortuga is Spanish for "turtle") from the planet Vulpin, which Wildmutt also originates from. The profile also suggests that Cannonbolt is capable of releasing a powerful chemical blast, though it does not explain where that chemical is released from.

Cannonbolt first appears in "The Big Tick" as an accidental transformation. Cannonbolt is the first new alien to appear on the Omnitrix. Despite Ben's initial dislike of the form, it has since become one of the most commonly used forms in the series and replaced Ghostfreak in the opening theme as Ghostfreak had escaped from the Omnitrix at the time.

Ditto

Ditto (voiced by Rob Paulsen) is a small, humanoid alien with the ability to clone himself without limit. Every clone operates independently, regardless of whether or not Ben wants them to, and each clone is indistinguishable from the others. Though the clones are autonomous, pain felt by one clone is transmitted to the rest, and the death of one will result in the death of the rest, as demonstrated by Dr. Animo's Ditto-enhanced Stinkfly mutants. The cloned Dittos can also merge back into an individual entity if they desire.

When the Omnitrix times out, the Ditto clones are forcibly recombined into one before the transformation reverts. If one or more clones are isolated from each other when the Omnitrix times out, however, the timer will reset and Ben won't revert back into human form until they are reunited. This only seems to apply when a clone is physically unable to reunite with the others; in open air, the clones will float to each other over great distances in order to facilitate the transformation. It is implied that the reset "glitch" forces the Omnitrix into a state where the next transformation is timed out much faster than usual, due to the strain of being active through multiple timeouts.

Though Ditto's cloning ability is limitless, each Ditto is no stronger or faster than their size suggests, necessitating distractions and trickery as opposed to outright fighting. Furthermore, the shared weakness of every single Ditto somewhat negates the usefulness of making large numbers of clones.

Ditto first appears in "Divided We Stand" as an accidental transformation.

Eye Guy

Eye Guy (voiced by Dee Bradley Baker) is part bat and part reptile. His upper-body is covered in eyes, hence the name. He has three-toed feet and four-fingered hands as well. Ironically, he has no eyes on his head, which consists of a mouth and a very large pair of ears.

Eye Guy is capable of firing energy beams from his eyes, the large eye in his chest firing the most powerful version. In addition, he can merge all of his eyes into the one on his chest to fire an even more powerful beam. In the episode "Ben 10 vs. the Negative 10 (Part 2)", Eye Guy is also able to fire a freezing beam from three merged eyes on his shoulder.

Eye Guy first appears in the alternate version of Ben 10: Secret of the Omnitrix, replacing Heatblast during the fight with Doctor Animo. How Eye Guy was obtained is never addressed.

Upchuck

Upchuck (voiced by Dave Wittenberg) is a Gourmand (from the French word meaning glutton) from the planet Peptos XI (Peptos being the Greek word for 'cooked' or 'digested'[1]). Upchuck has four strong, adhesive tongues that can stretch to great lengths, allowing Upchuck to latch onto large objects and reel them in with relative ease. Upchuck's mouth and stomach also stretch, allowing him to swallow and digest objects larger than himself.

As a Gourmand, Upchuck possesses several acid-filled stomachs that dissolve all forms of matter, except, ironically, ordinary human food. The items ingested are converted into explosive balls of liquids that can be expelled at will with great accuracy. Upchuck also seems to be able to take a surprising amount of punishment for a creature of his size, able to take the brunt force of a moving car impact as well as survive being thrown through a wall.

Upchuck first appears in the episode "The Visitor", when an alien named Xylene enters a code into the Omnitrix, activating the form.

Way Big

Way Big (voiced by Fred Tatasciore) is an enormous alien, nearly 100 feet tall, and by far the biggest alien in Ben's arsenal. His species and home planet are unknown, but his appearance is somewhat reminiscent of tokusatsu super heroes, particularly those of the Ultra Series. Way Big's size grants him extraordinary strength and invulnerability to most attacks; however, in proportion to his size, Way Big does not seem to be any more durable than normal, as Vilgax is able to cause him pain by digging in with his sharp claws.

Way Big first appears in Ben 10: Secret of the Omnitrix, when Azmuth activates it on the Omnitrix so Ben can fight Vilgax and his forces.

Wildvine

Wildvine (voiced by Jim Ward) is a Florauna (a combination of flora and fauna) from the planet Flors Verdance (a combination of flora and verdens, Latin for green). They are plant-based aliens with five vine-like legs, four-fingered claws, and venus flytrap-shaped flaps covering their heads. When exposed to cold, kept from sunlight, or deprived of a water source, however, they quickly wither up. This does not seem to be a problem for Wildvine, likely due to the limited periods in which it is used.

As a Florauna, Wildvine can grow any part of his body at will, allowing him to stretch his limbs to great extent and even allowing him to grow thorns. Being plant-based, Wildvine has the ability to merge with earth plants. He can also dig with relative ease and spread his tendrils underground to attack. Wildvine also has regrowable seeds on his back which can be used as various types of explosives, both lethal and non-lethal. The flaps on his head are also sufficiently strong to trap and hold a single person within.

Wildvine first appears in the episode "Camp Fear" as an accidental transformation.

Future alien forms

In the episode "Ben 10,000", set twenty years into a possible future, a thirty-year old version of Ben has access to 10,000 different aliens, of which he demonstrates three not yet accessible by the present Ben. Spitter (voiced by Dee Bradley Baker) is a large, blowfish-like alien with the power to spit slime at high pressures. Buzzshock (voiced by Tara Strong) is a green Megawhatt. Articguana (voiced by Tom Kane) is a blue lizard-like alien that can breathe freezing vapor.

A number of alien forms were mentioned in the episode "Ken 10", although none have made an onscreen appearance. Snakepit, Sandbox, and Shellhead were among Ken's starter aliens. Of the three, only Shellhead is described, being a turtle-like alien whose only power is to hide within its own shell. Another of Ken's initial aliens was Toepick, until he was replaced by Grey Matter (Ken described him as "too gross even for [him]"). Ken also mentions one called Atomix, expressing disappointment that it was not among his choices.

See also

• List of shapeshifters

External links

• The official Ben 10 website