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Top of the food chain, baby! Upchuck doesn't have a natural predator!

– Upchuck after eating Crabdozer.[1]

Upchuck is the Omnitrix's DNA samples of the Perk and Murk races of Gourmand from the destroyed planet Peptos XI and currently Peptos XII.[2][DJW 1]


Ben as Perk Upchuck

Perk Upchuck has green skin, six sprout-like growths on the back of his head, a dark-green patch of skin on his head, light-green skin on his face and belly and a crooked teeth overbite. He has whisker like lines on his face, and a green tail.

In the original series, Perk Upchuck had white eyes and wore a black open-front suit with white over-sleeves and white bands around his legs and white padding under his three-toed feet. He wore the original Omnitrix symbol on his left hand.

In Omniverse, 16-year-old Perk Upchuck does not wear clothes and his eyes are recolored green. He wears the Omnitrix on his stomach.

11-year-old Perk Upchuck looks almost the same as the original series, but his eyes and original Omnitrix symbol are recolored green and he now has bare feet with short claws.

Ben as Murk Upchuck

Murk Upchuck has swampy-green skin, a tanned stomach and muzzles, black sprouts and black-green spots on his tail, limbs, and back. His eyes are sharp and green, he has whisker-like lines, his teeth are more aligned with visibly sharp canine teeth and his tail is short and straightened, as opposed to Perk Upchuck's curled tail. Gwen as Murk Upchuck shares these traits.

In Heroes United, Murk Upchuck's black stripes on his face were longer, reaching his mouth, and he only had two lines instead of three. His claws were attached to his hands through finger stubs.

In Omniverse, Murk Upchuck resembles his previous design, except that his claws are longer and bigger, his sprouts are brighter, and he has less spots on his body. He now has only two teeth in the shape of an underbite, and the markings on his face are thinner and contained by the face, no longer spanning the head.

Murk Upchuck wears the original Omnitrix/Ultimatrix/Omnitrix symbol on his stomach.

Mad Ben as Mad Perk Upchuck

Mad Ben's Perk Upchuck has skin coloring that looks more like that of a Murk Gourmand. His teeth are now mirrored, and he wears a black helmet with a spike and orange glasses on it and spiked shoulder pads that are connected. He has orange bandages around his wrists, the spikes on the pads are orange, and the strap connecting the pads goes around the Omnitrix, which is on his chest. His eyes and Omnitrix are orange.

Powers and Abilities

Both Upchucks have three very strong, adhesive tongues that can stretch to great lengths, allowing them to latch onto large objects and reel them in with relative ease. They can eat virtually any object or matter all the way up to Ascalon.[DJW 2]

Besides objects and matter, both Upchucks can eat other beings such as tigers,[3] Crabdozers,[1] To'kustars,[DJW 3] and even Celestialsapiens.[DJW 4]

In the case of To'kustars, they would first have to be chopped up into bite-size chunks.[DJW 3] In the case of Celestialsapiens, they would either be digested or spat back out.[DJW 4]

Both Upchucks' mouths can stretch, allowing them to swallow objects larger than themselves. They are connected with a trans-space bladder dimension where they store all the "food" they eat. Both Upchucks are connected to the Gourmand species and can sense any danger to their people through their stomachs.[3]

By breathing air out of their mouths, both Upchucks are able to fly and even survive in the vacuum of space, as demonstrated by various Gourmands.[3]

The items ingested by either Upchuck are converted into explosive balls of liquids that can be expelled with great accuracy.[note 1] The explosive power of these "loogies" depends on the chemical composition and overall size of what Upchuck ate to create them.[pop-up 1][5]

Both Upchucks can carry heavy objects in their stomach, such as the Alpha Nanite's container, and release them without having to turn them into a "loogie."[6]

Both Upchucks can eat and spit out energy, such as lasers and a Crystalsapien's ultraviolet beams,[7] in the same way they eat and spit out acid matter.

Both Upchucks can make their "loogies" curve like a boomerang, shuriken, or Frisbee. They can also fire powerful streams of their explosive vomit like an energy beam by building up digested matter and releasing it all at once.[8]

Either Upchuck is able to take a surprising amount of punishment for a creature of their size, taking the force of a moving car impact, as well as surviving after being thrown through a wall.[9]

Both Upchucks can spit out slime, which can be slippery for Arburian Pelarotas. This slime is also capable of melting ice.[10]


Both Upchucks have a limit to how many big objects they can swallow at once. They also become slow and excessively when they eat a lot of things. Otherwise, they are somewhat quick, considering their small size.

If either Upchuck does not spit out something they eat, they will get very fat and rendered immobile until they spit it out.[11]

Upchuck cannot eat Ultimate Panuncians as they would simply thrash in his stomach until he regurgitates them safely.

There is a limit to the kinds of energy either Upchuck can ingest, as the energy beams of an Evolved Galvan made them inflate into a ball.[12]

Either Upchuck can be temporarily immobilized by a Necrofriggian's ice breath until they thaw themselves free using their slime.[10]

Despite being able to eat a Celestialsapien, neither Upchuck can gain the latter's powers in any form or way.[DJW 5]


Ben 10

Five Years Prior to Omniverse

Alien Force

Ultimate Alien


Mad Ben's Timeline


Season 2
Season 3

Season 1
  • Duped (first reappearance)
Season 3
Season 3
Season 3

16-year-old Ben
Season 3
Season 4
Season 6
Season 8
11-year-old Ben
Season 4
Season 8
Mad Ben
Season 7

Video Games

Ben 10: Protector of Earth

Perk Upchuck is a playable alien character in Protector of Earth; he is unlockable with a cheat on the DS version. He deals heavy damage to regular enemies and mini-bosses, but not to boss enemies.

Ben 10 Alien Force: Vilgax Attacks

Murk Upchuck is a playable alien in the game, replacing both Alien X and Cannonbolt in the Nintendo DS version.

Due to the Omnitrix rebooting after Ben's abuse of the quick change feature during his battle against Vilgax's forces, Murk Upchuck was temporarily locked until Ben's arrival in the Null Void, where both Murk Upchuck and Jetray are re-unlocked.

Murk Upchuck is able to consume any enemy projectile and spit it back as a green glowing energy ball. He is the recommended alien during the battle with the animated Mr. Smoothy mascot.

Ben 10: Omniverse

Perk Upchuck is a playable alien in the game (by 11-year-old Ben only). He is an exclusive for the DS and 3DS version.

Ben 10: Omniverse 2

Perk Upchuck is a playable alien in the game (only on 3DS).

Naming and Translations

Language Name Origin
Albanian Trashallupësi
Vjellja (Alien Force)
From trashaluqi, ugly face and llupesi, gluttonous
From vjell vomit
Bulgarian Ъпчък Bulgarian audible version from upchuck
Chinese 恶爆蛙 From (É), evil, (Bào), burst, and (Wā), frog
Croatian Žderko From žderko, eater
Dutch Opslok From opslok, swallower
French Gobe-Tout From gober, swallow whole, and tout, everything
German Spucknick From spucken, spitting and sputnick
Greek Πράσινος Εμετός From пράσινος, green and εμετός, vomit
Hebrew ריח חומצי From ריח,smell and חומצי acidic
Hungarian Böffencs
From böffencs, puking
From bendő, rumen
Italian Vomito From vomito, vomit
Norwegian Oppkast From opp, up, and kast, throw
Polish Apczak Polish audible version from upchuck
Portuguese (Br) Glutão From glutão, glutton
Romanian Upchuck From the original English name
Russian Блевака
From блевака, spew
From обжора, glutton
From головастик, polliwog
Serbian Žderko From žderko, eater
Spanish (HA) Ultrachoque (The Visitor)
Vomitón (No Honor Among Bros)
From ultra, ultra-; and choque, shock
From the original English name; pronounced /'optʃok/
From vomitón, a baby that vomits a lot It's also Vomit Man's Latin American name
Spanish (Spain) Vomitón From vomitar, barfing
Turkish Kusmuk (The Visitor, UAF and Omniverse)
Yalayut (Original Series Merchandise)
Upchuck (Original Series, No Honor Among Bros)
From kusmuk, vomit

From Yala, lick, and Yut, swallow
From the original English name


Upchuck's name is a pun of the verb "upchuck", which means to vomit, referencing his abilities.

The Perk prefix is named after Tom Perkins, who design Upchuck's appearance in the original series.[DJW 6][DJW 7]

The Murk prefix is named after Glen Murakami, who redesigned Upchuck for Alien Force and Ultimate Alien.[TP 1][DJW 7]


  • Upchuck is the only known Omnitrix alien who can switch between the different races of his species.[3][DJW 8] Azmuth's reasons for including both subspecies are unknown.[DJW 9]
    • The out-of-universe reason for this is because Derrick J. Wyatt liked both of Upchuck's designs, even though he preferred Perks, and wanted to use them together on the show.[DJW 10][DJW 11]
  • Unlike most aliens featured in Omniverse that had clothes in the original series, Perk Upchuck was unclothed as he appears cuter and more uncivilized naked.[DJW 12]
  • Upchuck does not have a natural predator because his species is at the top of the food chain.[1][DJW 13]
  • Both Perk Upchuck and Murk Upchuck have the same abilities; neither of them have abilities exclusive to any one Upchuck.[DJW 14]
  • Upchuck would have been the real winner of the loogie contest in Back with a Vengeance had Ben unlocked him prior to the events of the episode.[pop-up 2][13]
  • In the original series, Perk Upchuck was unable to consume human food.[9][pop-up 3][14] This was retconned in Omniverse, as he can now eat normal food as well as everything else.[DJW 15]
    • The out-of-universe reason for this change was because the crew felt that Upchuck not eating Earth food was too limiting.[DR 1]
  • Some of Perk Upchuck's prototypes were used to create Spitter, Arctiguana, Sploot, Mot Snikrep, and Zzzakt.[TP 2]
  • Like Arctiguana, Buzzshock, Frankenstrike, and Snare-oh, Murk Upchuck appeared in Omniverse, but he did not appear in A New Dawn.
    • The out-of-universe reason reason Murk Upchuck had fewer appearances than Perk Upchuck in Omniverse is because Derrick believed "Perks are the best Upchucks".[DJW 16]
  • Upchuck is one of the five aliens who have appeared in every series in the Classic Timeline; the other four are Cannonbolt, Diamondhead, Way Big, and Ghostfreak.
  • Murk Upchuck is the first alien in Alien Force to not have the Omnitrix on his chest. Instead, the symbol was on his stomach.
  • Perk Upchuck and Bullfrag are the only aliens to have been manually unlocked by entering a code into an Omnitrix.
    • Murk Upchuck is one of four aliens to have been unlocked by Azmuth; the others being Way Big, Bullfrag and Atomix.
  • 11-year-old Perk Upchuck is replaced with Juryrigg in Omniverse's Arc 5.
  • Upchuck was among the aliens considered to be featured in the reboot.[DR 2][DR 3]


  1. Both Perk and Murk Upchucks' explosive vomits are colored green. Meanwhile, alternate versions of Upchuck are shown firing explosive vomits in different colors. For example, Mad Ben's Perk Upchuck fires orange explosive vomits.[4]


Crew Statements

Derrick J. Wyatt

Duncan Rouleau

Tom Perkins


See Also

Introduced in Ben 10 ArctiguanaBlitzwolferBuzzshockCannonboltDiamondheadDittoEye GuyFour ArmsFrankenstrikeGhostfreakGrey MatterHeatblastRipjawsSnare-ohSpitterStinkflyUpchuckUpgradeWay BigWildmuttWildvineXLR8
Introduced in Alien Force Alien XBig ChillBrainstormChromastoneEcho EchoGoopHumungousaurJetrayLodestarNanomechRathSpidermonkeySwampfire
Introduced in Ultimate Alien AmpfibianArmodrilloChamalienClockworkEatleFasttrackJuryriggNRGShocksquatchTerraspinWater Hazard
Introduced in Omniverse AstrodactylAtomixBall WeevilBloxxBullfragCrashhopperFeedbackGravattackGutrotKickin HawkMole-StachePesky DustThe WorstToepickWalkatroutWhampire
Future Aliens SandboxShellheadSnakepit
Ultimate Aliens AlbedoArctiguanaBig ChillCannonboltEcho EchoGravattackHumungousaurRathSpidermonkeySwampfireWay BigWildmutt
Fusion Aliens Atomic-XBig ChuckCrashockerDiamond MatterFourmungousaurHeat JawsHumungoopsaurStink ArmsUprigg
Concept Fusion Aliens GravadactylXLRG
Other Aliens in Official Media AntigraviteslaBob the BlobCartoon Network AlienEon (Retconned)MoyoInvinciblePlantapocalypsePortalerRocksShadowmanSquidstrictorStretcheleo