34497a3fe0ef52949a1ba8e99894ed69 This article belongs to the Classic Continuity.

Lenopans, usually referred to as Sludgepuppies or Sludges, are a species of alien blob shapeshifters. Though now at peace with humanity, they have historically tried to cause trouble on Earth and had thus been in opposition with the Plumbers.


Mann sludgepuppy

Mr. and Mrs. Mann in their Lenopan form

Lenopans are capable of taking on humanoid shapes and features, such as skin and hair, or, in Lucy and Camille's case, a humanoid shape while retaining a mud-like appearance.

Female Lenopans have two mobile whiskers on their cheeks and two antennae above their much larger eyes, while males lack both. Male Lenopans usually have smaller eyes than females.



The Earth's Plumbers and the Lenopans were involved in a decades-long feud, before it was ended by the marriage of Plumber Joel Tennyson and Lenopan Camille Mann.

Ben 10

In Big Fat Alien Wedding, Joel was about to get married to his alien fiance, but Camille's family objected to her marrying a human. During the rehearsal dinner, Camille's Ex-Boyfriend disrupted the reception to forestall suspicion upon the parents, but he was quickly dealt with by Ben as Diamondhead.

During the wedding, the Mann family and another Lenopan disguised as a wedding staff member interrupted it, destroying everything. Ben turned into Heatblast to face the Manns, but later in the fight, they merged into one being. The Lenopans captured and engulfed Ben, dragging him into their body. They thought they had won, but were defeated from the inside by Heatblast's heat, which dried and solidified them into a brittle mass. Joel and Camille finally got married, which put an end to the decades-long Plumber/Lenopan feud once and for all.


Roughly six years later, Lucy Mann became the first Lenopan Plumber.

Powers and Abilities

Lenopans can stretch, morph and shape shift their bodies in any way shape or form at will, as well as changing their color and texture. They can detach their body parts, and stick them back on, reattaching them. If they are disembodied, their pieces will instinctively come together again and reconstitute them.

Lenopans can shapeshift their body parts, and sometimes themselves into other objects. Using their sludge, they can look like another shape made of purple sludge, while they can still move while in liquid form. Their ability to mimic color and texture allow them to mimic flesh or fabric exactly. They can also shapeshift into non-existent or imaginary species complete with unique abilities. They even can morph their body parts into melee weapons. 

Their liquid bodies can also be gelatinous, to the point where they are like large masses of muscle tissue, allowing them to be tangible and giving them the ability to physically interact and be mobile. Their bodies also generate slime, resulting in person jump through them, only to be covered with it, them being able to fire sticky sludge to subdue a target like webbing, and them being capable of regeneration and growing back parts of their bodies.


Lenopans can be harmed by water, fire, or by scattering enough of their body matter to the point where they cannot reconstitute (e.g. when Max set a Plumber gun to overload and stuck it in the body of the Bodyguard where it exploded). They will dissolve in water and turn the water purple, as they are unable to change out of liquid form, and fire will cause them to turn into brittle statues. However, both of these methods will only neutralize them and are not lethal.

If they stretch too far, it might result in the body part falling off.

Notable Lenopans

Naming and Translations

Language Name Origin
Hungarian Iszapfráter From iszap, sludge and fráter, critter
Spanish (HA) Desperdicios (Ben 10)
Novatos de lodo (Ben 10: Omniverse)
From desperdicios, wastes
From Novatos de lodo, sludge rookies
Spanish (Spain) Cachorros de lodo From cachorros de lodo, sludgepuppies


  • According to Deefus, "Sludgepuppy" is an offensive racial slur, and the proper term is Lenopans, though no other known Sludgepuppy seen has had a problem with the term until Deefus made his dislike of it known in Omniverse.
Sapient Species
AcrosianAerophibianAmperiAnoditeAppoplexianArachnichimpArburian PelarotaAtrocianBiosovortianCelestialsapienCerebrocrustaceanChimera Sui GenerisChronianChronosapienChurlCitrakayahConductoidContemeliaCrystalsapienDetroviteDracosianDragonsEctonuriteFloraunaGalileanGalvanGalvanic MechamorphGeochelone AerioGimlinopithecusGourmandHighbreedHulexHumanIckthyperambuloidIncurseanKineceleranKraahoLenopanLepidopterranLewodanLimaxLoboanMaxatomarMerlinisapienMethanosianNaljianNecrofriggianNemuinaNosedeenianOpticoidOrishanPantophagePetrosapienPiscciss PremannPiscciss VolannPolar ManzardillPolymorphProtostPrypiatosian-BPugnavorePyroniteRevonnahganderSegmentasapienSlimebioteSonorosianSotoraggianSpheroidSplixsonSylonnoidSynthroidTalpaedanTetramandThep KhufanTo'kustarTransylianUxoriteVaxasaurianVladatVreedleVulpimancerZaroffian
Evolved Sapient Species
ArachnichimpArburian PelarotaGalilieanGalvanHumanNecrofriggianSonorosianVaxasaurianVulpimancer
Unnamed Sapient Species
Argit's SpeciesAstrodactyl's SpeciesAtomix's SpeciesBall Weevil's SpeciesCrashhopper's SpeciesDagger AliensDecka's SpeciesEatle's SpeciesEnforcer Alien's SpeciesGutrot's SpeciesHobble's SpeciesJury Rigg's SpeciesKickin Hawk's SpeciesMedic's SpeciesMole-Stache's SpeciesPakmar's SpeciesPickaxe AliensProbity's SpeciesStone CreaturesTack's SpeciesTechadon Weapon Master's SpeciesTiny's SpeciesToepick's Species
Sapient Subspecies
Non-Sapient Species
Airborne Clown VirusAldebaran BeidafangsAnubian BaskurrBuglizardCassiopeian Dream EaterChupacabraCorrupturaCortalopusCrabdozerDasypodidaeDravekGracklflintHavok BeastLucubraMuroidNanochipNull GuardiansOmnivoraciousPallorfangPanuncianPsycholeopterranRodilia DentiaRoot SharkSand RipperScreegitScrutinTerroranchulaVicetopusVoliticus BiopsisWigsilian Org BeastXenocyteZiboson
Unnamed Non-Sapient Species
Cyber SquidsLiving MushroomsMucilator's SpeciesSlamworm's SpeciesSquid MonstersTime BeastsTyrannopede's Species

Start a Discussion Discussions about Lenopan