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He's not like the worst. He is The Worst.

– The Worst to Toolboxx.[1]

The Worst is the Omnitrix's DNA sample of an Atrocian originally from the planet Atrocius 0.[DJW 1]


The Worst is a yellow, fat, round blob-like alien who wears a pair of green underwear with white stripes on it. He has elephant-like feet with three toes and bear-like hands with three claws. He also has wart-like bumps on his forehead and both arms.

The Worst's Omnitrix symbol is located on his belly button.

Powers and Abilities

The Worst is indestructible on the outside of his body, as he is able to withstand heavy physical attacks due to his soft, blob-like body.[2][3][DJW 2]

The Worst has malleable skin, allowing him to absorb hits.[3]

The Worst can survive energy attacks, such as Exo-Skull's laser.[1]

The Worst is resistant against extreme heat and immune to acids.[1]

The Worst has claws that are like thick blunt nails.[DJW 3]


Pain Feeling

I said you were indestructible. I didn't say it wouldn't hurt.

Rook to The Worst during the latter's fight with Malice.[3]

Although he is indestructible, The Worst still feels pain.

Sharpened Taydenite can possibly break The Worst's skin.[DJW 4]

The Worst lacks any offensive options, basically becoming a punching bag for any capable enemy. In general, he has many attributes that could hinder him in battle.[DJW 5]

The Worst needs oxygen to breathe, meaning that he can neither breathe underwater nor survive in the vacuum of space.[DJW 6]

The Worst's claws are not really sharp.[DJW 3]

Like other organic beings, The Worst is vulnerable to being aged to dust by the time rays of a Chronosapien or a Chronian, though it would take a while due to all the dead skin and calluses.[DJW 7]





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Naming and Translations

Language Name Origin
Bulgarian Най-Лошия From the original English name
Chinese 糟糕先生 From 糟糕 (Zāo Gāo), worst, and 先生 (Xiān Shēng), mister
French Le pire From le pire, the worst
German Der Schlimmste From der schlimmste, the worst
Greek Ο Χειτόρερος From ο χειρότερος, the worst
Hebrew הכי גרוע From הכי גרוע, the worst
Hungarian A Legrosszabb From a legrosszabb, the worst
Italian Il Peggiore From il peggiore, the worst
Polish Najgorszy From najgorszy, worst
Portuguese (Br) O Pior From o pior, the worst
Romanian The Worst From the original English name
Russian Худший
From худший, the worst
From the original English name
Spanish (HA) Peor From peor, worst
Spanish (Spain) El Peor From el peor, the worst
Turkish En Kötüsü From en kötüsü, the worst


  • The Worst comes from the same planet as Ball Weevil.[DJW 8]
  • The Worst is Ben's least favorite alien.[DJW 9]
  • The Worst is one of four aliens unlocked by Driba and Blukic; the other three being Walkatrout, Pesky Dust, and Mole-Stache.[4]
  • In his first appearance, The Worst shared the same voice as Ben due to the Omnitrix malfunctioning. The out-of-universe reason was because the crew originally did not envision him as a usable alien for later episodes.[DJW 10] The Worst's voice was eventually changed in No Honor Among Bros because the crew liked how he turned out.[DJW 11]
  • Albedo's Ultimatrix does not contain The Worst's DNA.[DJW 12]
  • Like all the other Atrocians, The Worst was based on Jae Hong Kim's storyboards, as that's the way he would draw aliens.[DJW 13]
  • The Worst was among the aliens considered to be featured in the reboot.[DR 1]


Derrick J. Wyatt

Duncan Rouleau

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