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Mr. Mucky is the Omnitrix's DNA sample of a Methanosian from the planet Methanos and the Dimension 23 equivalent of Swampfire.


Mr. Mucky looks like Swampfire's original Omniverse design but in a blue color scheme. His body is aquamarine in color. The petals on his head and shoulders are aqua. The top of his head, where the tip of the petals is, is grey.

The Omnitrix symbol is located on his stomach.

Powers and Abilities

Mr. Mucky has the ability to ignite methane in his palms similar to a flamethrower. As demonstrated by Swampfire, his fire blasts are precise enough for him to shoot a cage with Kevin and Gwen in it, while the cage melted and Kevin and Gwen were left unharmed.[1]

Mr. Mucky's fire blasts are powerful enough to harm Vaxasaurians[2] and Sonorosians.[3] By the time he reaches his "blossomed" form, his fire blasts will become more powerful than before.[4]

Mr. Mucky is capable of limited flight through means of launching fire from his palms as jet propulsion, much like Charcoal-Man.[5] He is also capable of breathing fire, as demonstrated by Swamps.[6]

Mr. Mucky has a high degree of chlorokinesis,[DJW 1] being able to telepathically interface with plant life, manipulate and instantly create biological agriculture, and generate a gas that makes exposed plant life elongate, enlarge and ensnare enemies, seemingly being mutated by the gases. Some plants have a brief green aura when he influences them.[7]

Aside from Earth plants, Mr. Mucky uses his telepathic plant interface with alien plant life, which was what allowed Swampfire to free Max from the Highbreed Tree Monster.[8] In his "blossomed" form, his telepathic influence over plants will extend to sentient plant life, such as the Mutant Pumpkins from Anur Transyl.[4]

Mr. Mucky can generate seeds from his body that phase into or pierce into any ground or flooring before turning to vine tentacles strong enough to restrain a Highbreed[9] and a Chimera Sui Generis.[10] They usually are as small as pebbles, but they can sometimes become larger and sharper if used on a metal surface.[10]

Mr. Mucky body can generate a type of mud that sticks to everything but him, which Swampfire used to blind Negative Humungousaur, as the latter could not pull it off his eyes and had to change into Negative Big Chill to get rid of it.[2]

Mr. Mucky is capable of regenerating and regrowing any damaged or destroyed body parts, allowing him to grow back lost limbs, holes in his body, or even his head. He was even able to reform his body from remains when it got splattered to pieces.[11]

Another method of regeneration involves reattaching detached body parts. This is accomplished by manipulating his vine-like "veins" and tentacles to reach out and meld with the insides of the detached limb and return them to the body, allowing him to reconstitute automatically if damaged.[12]

Mr. Mucky methane has a very pungent smell that is intolerable to some species like the Incurseans, which will make them retch and faint.[1] Using his methane abilities, Mr. Mucky can produce "sleeping spores" that can render humans unconscious.[13]

Mr. Mucky has enhanced strength, being able to push over a Highbreed Weather Array using leverage by turning his feet into roots running deep into the ground.[14] Similarly, Swampfire was able to pull himself out and resist the gravitational force of a Null Void portal,[15] and even hold his own against Vilgax with his bare fists.[10] In his "blossomed" form, Mr. Mucky will become even stronger than before.[4]

Mr. Mucky's body structure allows him to walk straight through thin spaces such as the gaps between iron bars.[1] When Swampfire was crushed under a large container, his body deformed into vines that burrowed through and then out of the ground to reform him instantly. In the same instance, Kevin punched him in the torso, resulting in his fist getting stuck in it until Swampfire punched him back.[12]

Mr. Mucky is able to extend his fingers and feet into long roots that can dig through rock.[7]

Mr. Mucky is capable of jumping exceptionally high.[14]

Mr. Mucky has rather strong teeth that are able to injure another Methanosian.[4]

Mr. Mucky can generate vine-like tentacles from his back.[16]

Mr. Muck can grow plants from the ground simply by raising his hand, though he will only have gained this ability after "blossoming".[4]

Also after "blossoming", Mr. Mucky will gain the ability to grow vines with a flame tip from his hands and use them as whips, which are able to slice the plasma generated by Ball Weevil's species.[17]


Similar to Big Bug's odor, Mr. Mucky's swampy stench can make it hard for him to hide from anybody or anything capable of smelling.

Despite his regeneration, Mr. Mucky can be continuously cut up by sharp objects, such as a Polymorph's Anti-Gravity Projector, preventing him from regenerating.[11]

Mr. Mucky can be harmed by electricity, such as that generated by a Conductoid.[17]

Mr. Mucky can be immobilized by ice, such as the ice breath of a Necrofriggian, though he can thaw himself out by igniting the methane in the palms of his hands.[14][2]

Mr. Mucky's fire attacks can be canceled out by fire extinguishers.[18]

Mr. Mucky is vulnerable to magic, as Swampfire's back was scorched by a magic attack from Charmcaster (while empowered by the Alpha Rune armor).[4]

Mr. Mucky's body heat can make it difficult for him to fight opponents that are attracted to heat, like reptiles.[19]

Mr. Mucky can be immobilized and overpowered by the gravity powers of a Galilean.[17]

Like other organic beings, Mr. Mucky is vulnerable to being aged to dust by the time rays of a Chronosapien or a Chronian.[20]

Despite his enhanced durability, Mr. Mucky can feel pain from being bitten by another Methanosian, as seen when Swampfire was bitten by Anur-Mirrored Swampfire.[4]

Mr. Mucky's plants can be killed using liquid chemicals, such as a spray used by the Stalker.[18]

Mr. Mucky is unable to control sentient plants, such as the Plant Clones, let alone weeds.[21] This weakness will eventually be no longer a problem by the time be "blossoms".[4]

Despite his enhanced strength, Mr. Mucky is physically weaker than Crystalsapiens,[DM 1] Tetramands, and Vaxasaurians.[DM 2]

If Ben 23 turns into Mr. Mucky with a broken limb, his limb will be twisted and shriveled, and he will feel pain from it.[22]

Naming and Translations

Language Name Origin
Polish Mr. Mucky From the original English name
Portuguese (Br) Mr. Mucky From the original English name
Romanian Mr. Bălegar From Mr., and bălegar, muck
Spanish (HA) Mr. Mucky From the original English name


The word "mucky" means to be covered with or consisting of dirt or filth, referring to how the alien is made of a moist swampy composition.


Crew Statements

Derrick J. Wyatt

Dwayne McDuffie

Dimension 23 Aliens
Seen Aliens
Big BugBrainfrogBuild-A-GuyDino-MightyElectricyetiEye GuyFreezeghostFreezelizardHandy ManLightning VoltMr. MonkeyNighty KnightRollawaySpeedyquickTechno-BubbleToolboxxVomit Man
Unseen Aliens
Bat-DudeCharcoal-ManCopy CopyDog-NabbitFastcatFeedbackFish FingersFright FaceGiant-MansterHose HandsJellyFritzMr. MuckyMuck-A-MuckOrbit ManRathTeeny-WeenyWindy-Hindy
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