History Monster / Ben10

%% NOTE: Due to the controversial nature of this trope, any changes (additions, removals, edits) should be discussed [[https://tvtropes.org/pmwiki/posts.php?discussion=6vic3f9h1cy5qivsenw8llok here]].

** [[WesternAnimation/Ben10 Original series]]: [[{{Cthulhumanoid}} Vilgax]] repeatedly invades Earth and endangers entire cities to gain the Omnitrix, even turning a teenage delinquent into his mutated [[SlaveryIsASpecialKindOfEvil slave]] under threat of killing her if she disobeys. Having tricked Tetrax into helping Vilgax [[FinalSolution wipe out]] the alien's own race and threatened Ben's cousin Gwen repeatedly, Vilgax tries to saw off Ben's hand and rip the Omnitrix from him, uncaring of the danger of universal annihilation the device presents from such an act.

* [[EnemyWithout Zs'Skayr]], aka [[OurGhostsAreDifferent Ghostfreak]], was the power-hungry High-Ecto Lord of the Ectonurites, but desired domain over everything. Wanting the Omnitrix's power, Zs'Skayr had his DNA scanned, but his conscious ends up trapped in the Omnitrix. Upon escaping, he tries to possess Ben and violently abuses the Circus Freak Trio to force them to assist, before possessing Gwen and threatening to kill her. Resurrected after his death, Zs'Skayr [[HostileTerraforming plunges the Earth]] into [[TheNightThatNeverEnds darkness]] using mutagenic Corrodium radiation, which mutates everyone into nightmarish monsters. Zs'Skayr [[Recap/Ben10AlienForceS3E10GhostTown later]] betrays Vilgax by infecting Vilgaxia's populace, turning the people into Ectonurite slaves, and intends to spread his influence to the entire universe. Zs'Skayr [[WesternAnimation/Ben10Omniverse makes his final return]] escaping Ledgerdomain, where he frees his minion Dr. Viktor by [[SoulEating devouring the soul of King Xarion]] inhabiting his body, then stowing away as a sabotaged ship returns to his star system, where Zs'Skayr resurrects a Vladat called Lord Transyl, planning to use his DNA template to revive the Vladats to serve as his personal army, knowing fully well Vladats fed-on and enslaved Viktor's species.

->'''Eon''': We're partners! I deserve to be in on every detail of your plan! Especially when it involves a bomb!\\
'''[[Characters/Ben10Vilgax Vilgax]]''': Not just any bomb! A Chronosapien Time-Bomb!\\
'''Eon''': So you're going to wipe out this Ben 10 and his timeline? ''Nice''.\\
'''Vilgax''': On the contrary, the detonation won't even touch this timeline. It's designed to wipe out other timelines.\\
'''Eon''': Which one?\\
'''Vilgax''': All of them.\\

'''Vilgax''': (''laughs'') Only this timeline will remain intact, while every Ben Tennyson not from this timeline will be destroyed.\\
'''Eon''': But I'm an alternate Ben Tennyson not from this timeline! What..what happens to me?\\
'''Vilgax''': Thank you for your help Eon. Your assistance is no longer required.

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/vilgaxbodies.jpg]]
[[caption-width-right:350:"You have all earned your demise at my hands!"]]

* [[EnemyWithout Zs'Skayr]], aka [[OurGhostsAreDifferent Ghostfreak]], was the power-hungry High-Ecto Lord of the Ectonurites, but desired domain over everything. Wanting the Omnitrix's power, Zs'Skayr had his DNA scanned, but his conscious ends up trapped in the Omnitrix. Upon escaping, he tries to possess Ben and violently abuses the Circus Freak Trio to force them to assist, before possessing Gwen and threatening to kill her. Resurrected after his death, Zs'Skayr [[HostileTerraforming plunges the Earth]] into [[TheNightThatNeverEnds darkness]] using mutagenic Corrodium radiation, which mutates everyone into nightmarish monsters. Zs'Skayr later betrays Vilgax by infecting Vilgaxia's populace, turning the people into Ectonurite slaves, and intends to spread his influence to the entire universe. Zs'Skayr makes his final return escaping Ledgerdomain, where he frees his minion Dr. Viktor by [[SoulEating devouring the soul of King Xarion]] inhabiting his body, then stowing away as a sabotaged ship returns to his star system, where Zs'Skayr resurrects a Vladat called Lord Transyl, planning to use his DNA template to revive the Vladats to serve as his personal army, knowing fully well Vladats fed-on and enslaved Viktor's species.

[[AC:[[WesternAnimation/Ben102016 2016-2020/2021]]'s ContinuityReboot]]

%% NOTE 2: A CompleteMonster is an individual character, not a collective. Therefore a faction cannot be listed as one. %% A faction can attract Complete Monsters and can have them among its members, but cannot be one in and of itself.

![[Administrivia/SpoilersOff All spoilers are unmarked]]. Administrivia/YouHaveBeenWarned!

'''Vilgax''': Not just any bomb! A Chronosapien Time-Bomb!\\

* [[OverarchingVillain Vilgax]] is a power-hungry GalacticConqueror who seeks nothing more than the subjugation of all life, and the annihilation of all who stand against him. Vilgax has enslaved or wiped out entire worlds in his conquests; betrays and murders his own [[ChronicBackstabbingDisorder allies]] and [[BadBoss minions]]; and repeatedly tries to get his hands on the Omnitrix despite its bond to Ben Tennyson, being willing to dismember and murder Ben even when he was a 10-year-old boy to obtain his goals. Vilgax has shredded any possible redeeming features he may have in his tormenting of Ben for years, and earns his status as the heroes' ArchEnemy.

[[Franchise/Ben10 Ben Tennyson]] and his allies have been [[ThemeTune fighting off evil from Earth or space]] since 2005, and while some of their foes have had sympathetic qualities, [[CompleteMonster these guys]] quite frankly do not.

* Season 1 & 2: [[GodhoodSeeker Aggregor]] is an Osmonian warlord who is wantonly murderous in his quest to achieve omnipotence. Aggregor killed aliens by absorbing their energy and matter to [[PowerCopying gain their powers]]. Generally this caused his victims to turn into desiccated husks, but for his plans to become powerful enough to reassemble the Map of Infinity, he turned five aliens into energy and absorbed them into himself. Aggregor killed Magister Prior Gilhil by stabbing him InTheBack, killed two other Plumbers by sucking them into space, and absorbed the life and powers of a pacifistic alien just because he could. His two most vile crimes, however, were when he nearly destroyed an entire inhabited world by stealing a component from the device that kept the planet from breaking apart, and when he tried to [[WouldHurtAChild kill and absorb a baby alien]] capable of {{Reality Warp}}ing to complete his ascension into godhood.

* [[OurGhostsAreDifferent Zs'Skayr]], aka [[EnemyWithout Ghostfreak]], was the power-hungry High-Ecto Lord of the Ectonurites, but desired domain over everything. Wanting the Omnitrix's power, Zs'Skayr had his DNA scanned, but his conscious ends up trapped in the Omnitrix. Upon escaping, he tries to possess Ben and violently abuses the Circus Freak Trio to force them to assist, before possessing Gwen and threatening to kill her. Resurrected after his death, Zs'Skayr [[HostileTerraforming plunges the Earth]] into [[TheNightThatNeverEnds darkness]] using mutagenic Corrodium radiation, which mutates everyone into nightmarish monsters. Zs'Skayr later betrays Vilgax by infecting Vilgaxia's populace, turning the people into Ectonurite slaves, and intends to spread his influence to the entire universe. Zs'Skayr makes his final return escaping Ledgerdomain, where he frees his minion Dr. Viktor by [[SoulEating devouring the soul of King Xarion]] inhabiting his body, then stowing away as a sabotaged ship returns to his star system, where Zs'Skayr resurrects a Vladat called Lord Transyl, planning to use his DNA template to revive the Vladats to serve as his personal army, knowing fully well Vladats fed-on and enslaved Viktor's species.

* [[{{Cyclops}} Zs'Skayr]], aka [[OurGhostsAreDifferent Ghostfreak]], was the power-hungry High-Ecto Lord of the Ectonurites, but desired domain over everything. Wanting the Omnitrix's power, Zs'Skayr had his DNA scanned, but his conscious ends up trapped in the Omnitrix. Upon escaping, he tries to possess Ben and violently abuses the Circus Freak Trio to force them to assist, before possessing Gwen and threatening to kill her. Resurrected after his death, Zs'Skayr [[HostileTerraforming plunges the Earth]] into [[TheNightThatNeverEnds darkness]] using mutagenic Corrodium radiation, which mutates everyone into nightmarish monsters. Zs'Skayr later betrays Vilgax by infecting Vilgaxia's populace, turning the people into Ectonurite slaves, and intends to spread his influence to the entire universe. Zs'Skayr makes his final return escaping Ledgerdomain, where he frees his minion Dr. Viktor by [[SoulEating devouring the soul of King Xarion]] inhabiting his body, then stowing away as a sabotaged ship returns to his star system, where Zs'Skayr resurrects a Vladat called Lord Transyl, planning to use his DNA template to revive the Vladats to serve as his personal army, knowing fully well Vladats fed-on and enslaved Viktor's species.
* [[MultiversalConqueror Eon]] is an [[EvilDoppelganger evil alternate Ben Tennyson]] who traverses the space-time continuum enslaving the Bens of different timelines to become his brainwashed servants. After getting banished from the [[Film/Ben10RaceAgainstTime Race Against Time]] timeline, Eon [[Recap/Ben10UltimateAlienS2E10Ben10000Returns tricks Ben-Prime and Ben 10,000]] into using the Hands of Armageddon to free him, intending to eliminate both Bens so that Eon can create a new timeline where he is the sole Ben Tennyson. Trapped in the main timeline, Eon [[WesternAnimation/Ben10Omniverse attempts to acquire Professor Paradox's Chrono Navigator]] so he can freely travel, luring Paradox over by performing a temporal [[FreakyFridayFlip brain swap]] between the 11 and 16-year-old Bens. Ignoring Paradox's warnings, Eon's rampant abuse of the Chrono Navigator ruptures the timestream, with Eon declaring that if he couldn't rule reality [[OmnicidalManiac he would destroy it instead]]. Eon returns allied with Vilgax, where he recruits evil Bens from throughout the cosmos to attack the No Watch timeline and was ecstatic when he believed Vilgax would nuke said timeline. Eon also assists Maltraunt in his plan to rewrite reality, by gathering Time Beasts. Having endangered the entire cosmos multiple times for his own selfish goals, Eon earns a place as one of the most vile villains to ever appear.

[[AC:[[WesternAnimation/Ben102016 2016 reboot]]]]
* [[MakeSomeNoise Lord Decibel]] is a DJ supervillain who uses his weaponized music to hold large crowds hostage and [[OnlyInItForTheMoney demand hefty ransoms from them]]. His [[ThereIsNoKillLikeOverkill mass murder attempts]] include: breaking off a landmass from the continent, causing an avalanche, generating a tsunami, and hijacking a train full of people and speeding the train to potentially lethal speeds.
* [[FakeUltimateHero Tim Buktu]] poses as a hero, but in reality [[EngineeredHeroics causes the endangering of lives himself]], including setting boat on fire and an explosion. When exposed by Ben, he throws acid at the boy and ends up breaking the dam that are standing in where he [[DirtyCoward tries to flee]]. Wanting revenge on Ben, Tim [[BrainwashedAndCrazy controls the boy using a voodoo doll]] and makes him commit crimes including [[WouldHurtAChild attempting to drown a boat full of children]]. Claiming to have reformed, Tim remote controls a dragon to attack a town so he can pretend to save it, before attempting to murder Ben after he gets exposed.
* "Bright Lights, Black Hearts" & "The Charm Offensive": [[BeautyIsBad Michael Morningstar]] is a centuries old energy-vampire who has maintained his youth by [[LifeDrinker draining the life force from his admirers]]. To maintain his support he poses as a [[NiceCharacterMeanActor teen actor playing a beloved character]] while being an BadBoss to his production team. Jealous of Ben's attention, Morningstar exploits Gwen's feelings for him to find out how to defeat Ben. When most of his supporters leave, Morningstar is only assisted by Charmcaster as his one remaining admirer, but acts as an abusive UngratefulBastard towards her and only sees her as a glorified battery.

* [[{{Cyclops}} Zs'Skyar]], aka [[OurGhostsAreDifferent Ghostfreak]], was the power-hungry High-Ecto Lord of the Ectonurites, but desired domain over everything. Wanting the Omnitrix's power, Zs'Skayr had his DNA scanned, but his conscious ends up trapped in the Omnitrix. Upon escaping, he tries to possess Ben and violently abuses the Circus Freak Trio to force them to assist, before possessing Gwen and threatening to kill her. Resurrected after his death, Zs'Skayr [[HostileTerraforming plunges the Earth]] into [[TheNightThatNeverEnds darkness]] using mutagenic Corrodium radiation, which mutates everyone into nightmarish monsters. Zs'Skayr later betrays Vilgax by infecting Vilgaxia's populace, turning the people into Ectonurite slaves, and intends to spread his influence to the entire universe. Zs'Skayr makes his final return escaping Ledgerdomain, where he frees his minion Dr. Viktor by [[SoulEating devouring the soul of King Xarion]] inhabiting his body, then stowing away as a sabotaged ship returns to his star system, where Zs'Skayr resurrects a Vladat called Lord Transyl, planning to use his DNA template to revive the Vladats to serve as his personal army, knowing fully well Vladats fed-on and enslaved Viktor's species.

* [[FakeUltimateHero Tim Buktu]] poses as a hero, but in reality [[EngineeredHeroics causes the endangering of lives himself]], including setting boat on fire and an explosion. When exposed by Ben, he throws acid at the boy and ends up breaking the dam that are standing in where he [[DirtyCoward tries to flee]]. Wanting revenge on Ben, Tim [[BrainwashedAbdCrazy controls the boy using a voodoo doll]] and makes him commit crimes including [[WouldHurtAChild attempting to drown a boat full of children]]. Claiming to have reformed, Tim remote controls a dragon to attack a town so he can pretend to save it, before attempting to murder Ben after he gets exposed.

* Tim Buktu

* Lord Decibel

* "Bright Lights, Black Hearts" & "The Charm Offensive": * [[BeautyIsBad Michael Morningstar]] is a centuries old energy-vampire who has maintained his youth by [[LifeDrinker draining the life force from his admirers]]. To maintain his support he poses as a [[NiceCharacterMeanActor teen actor playing a beloved character]] while being an BadBoss to his production team. Jealous of Ben's attention, Morningstar exploits Gwen's feelings for him to find out how to defeat Ben. When most of his supporters leave, Morningstar is only assisted by Charmcaster as his one remaining admirer, but acts as an abusive UngratefulBastard towards her and only sees her as a glorified battery.

* "Bright Lights, Black Hearts" & "The Charm Offensive": Michael Morningstar

* [[GodhoodSeeker Aggregor]] is an Osmonian warlord who is wantonly murderous in his quest to achieve omnipotence. Aggregor killed aliens by absorbing their energy and matter to [[PowerCopying gain their powers]]. Generally this caused his victims to turn into desiccated husks, but for his plans to become powerful enough to reassemble the Map of Infinity, he turned five aliens into energy and absorbed them into himself. Aggregor killed Magister Prior Gilhil by stabbing him InTheBack, killed two other Plumbers by sucking them into space, and absorbed the life and powers of a pacifistic alien just because he could. His two most vile crimes, however, were when he nearly destroyed an entire inhabited world by stealing a component from the device that kept the planet from breaking apart, and when he tried to [[WouldHurtAChild kill and absorb a baby alien]] capable of {{Reality Warp}}ing to complete his ascension into godhood.