Ben vs Nega Ben

Ben Tennyson meets his evil twin Nega Ben Tennyson who has come this Earth because of Vilgax.

Plot:
Vilgax the Conqueror ruler of ten worlds and his own world of Vilgaxia has previously suffered a defeat at the hands of Ben Tennyson. With the Warrior's Challenge not in his favor Vilgax is by law unable to ever go to Earth and attempt to conquer it again. So Vilgax intends to try and soften the blow find other worlds to conquer. Which he might as he has in possession a very powerful weapon that will allow him to conquer this world he currently resides over. It is only a prototype however but Vilgax commands for it to be activated at once. However a miscalculation causes an unexpected explosion to go off. Which courses through the entire ship and hits Vilgax's warp field generator which causes it to activate. A giant black hole in created unintentionally which causes the ship to be pulled in. Vilgax commands all thrusters at maximum to try and get them out of the gravitational hold but no luck. His servant Psyphon states, "My lord we can not the black hole already has us in its grips and we are being pulled through."

The ship begins to pass through and it may be possible they won't escape alive but something happens. As they are indeed pulled through however they and the ship manages to survive with everyone in tact. Vilgax demands a damage assessment with Psyphon stating the ship is fine with a few minor damages. However there is a transmission that breeches the ship which is, "Unknown vessel you are violating the space ways of his supreme leader the Overlord of the universe. Turn back or be destroyed in seconds." Vilgax does not cower at that warning and demands to know who is so impudent to make such a command at Vilgax the Conqueror. Until then there is another voice that says, "Vilgax the Conqueror? You sound amazingly healthy my old mentor considering the fact you are suppose to be dead." Vilgax knows that voice or so he believes and demands who ever spoke to him reveal himself at once. So the transmission then switches to view screen and Vilgax sees it for himself.

It is Ben Tennyson on the view screen which surprises Vilgax as much as it surprises Ben and which they converse with one another.

Vilgax: What is this trickery? Tennyson what are you doing here in space and what did the ship mean by Overlord?

Ben: It's just as was said my old friend I am supreme leader of this entire galaxy as well as the Andromeda Galaxy. It was all thanks to you Vilgax taking me in as your apprentice and I conquered all.

Vilgax: Now I see what happened when we passed through that black hole we wound up in another universe. Where in this one there's an evil Ben Tennyson which could serve my purposes. As in how would you like to help me conquer the universe Overlord Ben?

Ben: I'm listening Vilgax and what do you mean AN evil Ben?

Vilgax: I mean it all Ben and with an opponent worthy of you to fight and destroy.

Ben: That's impossible Vilgax no one is worthy or powerful enough to face yours truly.

Vilgax: Oh no well does the name Ben Tennyson peek your interest?

That does indeed get Ben's attention and so he commands his forces to begin the invasion of Vilgax's dimension at once. However of course there is one thing Ben will need to do and that is to get rid of his good counterpart. Who is currently on Earth with Gwen and Kevin having some chili fries like usual. It has been a bit of a slow week with no alien activity or even someone trying to steal from a bank. Ben is bored and really bored and it's starting to annoy Gwen and Kevin who can't enjoy their meal. However Ben might get some action after all as the skies darken with what look like alien vessels. They are all over the town and are destroying everything and people are running in droves. Ben and his friends have to do something of course and so Ben transforms into the alien Jetray and begins flying after the small fighters. Kevin removes his ID Mask and reveals his mutated form which is an amalgam of different minerals and wood.

He shapes his hands into weapons so he to can fight along with Gwen who uses her mana powers to fight back as well. At Plumber HQ Grandpa Max and the Plumber Kids also go into battle to help in any way they can. Although reports are coming in from all over the world that these alien fighters are all over the globe. With so much chaos and destruction both the evil Ben and Vilgax look on with smiles on their faces. The evil Ben can see though that his good twin might pose a problem so he intends to face him himself. Vilgax objects to this as it might jeopardize their mission but the evil Ben does not care. He transforms into Fourarms and leaves his ship to face his good twin once and for all. Who is on the streets fighting as Humongosaur and putting up a decent fight until his evil twin comes. He speaks, "Well, well Ben Tennyson trying to vanquish my invasion force. Hmm guess you really are a hero in this dimension which is a real shame."

The evil Ben strikes his good twin with all four of his arms and even uses his powerful legs and knees him strait in the chest. Ben is feeling the pain and tries to comfort it by grabbing his chest to try and soften the blow. However the evil Ben gives the good Ben no time to rest and keeps attacking him. The evil Ben has to comment he's expected more from Ben Tennyson especially since they are the same person. Ben doesn't understand what the Fourarms alien meant by that so he reveals himself. He returns back to his human form and everybody sees that it is Ben or at least someone who looks like him. Which he says, "What's the matter Ben never fought an evil alternate version of yourself? HAHAHAHAHAHAHAHAHAHAHAHAHA!" Ben can not believe what he is seeing but it's true an evil version of Ben is the one who is invading Earth. Who on the other hand calls for Ben to surrender or else he may have to do something unfortunate.

Ben thinks his evil twin is bluffing but shows he is not as he gets a glance at Gwen which sets him over the edge. He proves just how serious he is by transforming into XLR8 and zooms to her strait away. Which then he becomes Humongosaur and then grabs her by the arms and legs and looks as if he might rip her apart. He then says, "Now then Ben you will surrender to me or I will rip Gwen in half right in front of you!" Ben thinks the evil Ben is bluffing but he shows how wrong Ben is by beginning to pull on her right now. She screams and screams so Ben has to no choice and surrenders to him. So then the evil Ben tosses her on Kevin and the evil Ben reverts to human form. He commands his ship to beam them aboard and it begins to leave the planet with Gwen and Kevin powerless to do anything.

On the ship the good Ben is in restraints suspended in the air and Vilgax comes to see his prisoner. Ben sees him and isn't surprised one bit that Vilgax was involved with this in some form or another. However has to say how Vilgax was forbidden to ever step foot on Earth after his defeat at the hands of Ben. Vilgax has to comment he never stepped foot on Earth and he had nothing to do with the invasion. It was all on the command of the evil Ben all Vilgax did was give it a little push. As this will indeed be the ultimate vengeance as Ben Tennyson Vilgax's ultimate foe is not killed by him but by an evil Ben Tennyson. He finds it almost poetic as does the evil Ben who comes in to speak with his prisoner. Ben still can not get to grips with the fact he has a truly evil and sadistic twin. He does recall Albedo of course but even he wasn't as deranged as this evil Ben is. Who has to say, "Don't ever compare me to Albedo Ben you got that? I killed that little bug and destroyed all of Galvan when they tried to usurp me."

Vilgax truly admires the evil Ben's ruthlessness but the good Ben finds it sick and disgusting by all accounts. He can not truly believe there is an evil version of Ben in the entire multiverse. Especially at what he just heard of what he did to the Galvan planet from his universe or even wants to think what the evil Ben will do to his own world. The evil Ben then explains, "Listen Ben I worked hard in the five years it took me to conquer the entire Milky Way and Andromeda Galaxies. In order to keep those worlds in check I plan very powerful fusion devices in the center of the planet's cores. If they show any sign of rebellion or heck even if I'm angry I blow them up. A shame really I've lost a good fifty planets to my anger issues." Ben is even more repulsed at what he just heard and it even disturbs Vilgax. He knows he might have been blinded by the ruthlessness of the evil Ben. Vilgax believed maybe he could control him but clearly that is not possible.

Ben however wants to ask one more question about his evil counterpart and that is why is he doing all this? So then the evil Ben says, "You want to know my story Ben okay I'll tell you. It all started when I was ten when I found the Omnitrix. However unlike you I bet my childhood was not pleasant. I was always an outcast and people called me hurtful things and treated me like I had the plague. Our dear cousin Gwen was the worst out of everyone and when I ran into the forest balling my eyes out I found it. I took the Omnitrix and found the awesome power and it was destiny. I instantly discovered how it works and went from alien to alien and unlike you I found the master control. I used it to steal, destroy, and get back at everyone who wronged me. Until then he came Vilgax the Conqueror he wanted the Omnitrix but I told him it was mine and all the plans I had for it. He was intrigued and so I became his apprentice and conquered several worlds in his name. I wanted to eventually take over Earth but squid face there denied me that. So I killed him and made his armada over in my image and the rest is history."

Ben is even more disgusted at what he heard and scolds his evil twin for all he said and that he should have used the Omnitrix for good. Evil Ben could have been gracious to others and maybe even be better than all those people who did make him miserable. The evil Ben comments on how much the good Ben sounds just like his grandfather. Ben gasps at that notion and demands to know what happened to him. The evil Ben says he did not kill Max which he admits is one of his biggest mistakes. Instead Max now leads a resistance against Ben however they are mere annoyances than a threat. Any way now the evil Ben leaves his prisoner and Vilgax alone and tends to his new plan for Earth. Which is indeed to plant a fusion device in the center of the Earth. Ben has to scold Vilgax on how his new partner is crazier and more eviler than Vilgax. Which he does know this and Vilgax knows he made a huge mistake and that the evil Ben will need to be eliminated.

Which also means Vilgax is going to have to do something that goes against his better judgment. He is going to need to help his sworn enemy take down this evil counterpart and stop him from destroying Earth. As Vilgax still intends to conquer it himself some day but for now he and Ben will call a truce. He lets the good Ben go however he has no real reason to trust Vilgax nor does Ben feel he needs his help. Vilgax has to say, "Listen Ben Tennyson it was my misjudgment that allowed the evil Ben to come here. If we do not stop him he might even turn his attention to my home world and that I can not allow." So then Ben will work with Vilgax but only this once which then they shake hands. Ben and Vilgax then search the ship and intend to find the evil Ben and stop his twisted plan once and for all.

Who is in his laboratory on his massive warship putting the final touches on the fusion device now. He intends to teleport to the center of the Earth's core where he intends to detonate it. The evil Ben has no intention of wanting to rule this Earth as he does not intend for there to be two Ben Tennysons let alone more if possible in the multiverse. The bomb is set and ready for transport however Ben and Vilgax arrive in time. The evil Ben turns to see his former ally and good twin which the good Ben says, "Okay listen uh Nega Ben I know your childhood was rough but I am not going to let you blow up Earth." The evil Ben seems to like that title Nega Ben and he decides to keep it. He sees that Vilgax has formed an alliance with his arch foe but figured this might happen. For Nega Ben admits that when he killed Vilgax he tried to make the Vilgaxians follow him instead. They were all only loyal to Vilgax so then Vilgaxia was the first planet he ever destroyed.

That drives Vilgax over the edge which causes him to attack Nega Ben who transforms into Humongosaur and defends himself. Ben has to get to that bomb and destroy it and he might actually be able to use it to blow up the ship. Ben transforms into Brainstorm which a side effect of the alien makes him very intelligent. Brainstorm then gets to work on reprogramming the bomb to only emit a pulse that will destroy this ship and not the Earth. Nega Ben and Vilgax continue their fight with Nega Ben saying, "You were weak Vilgax and you always will be just like your people. I did the universe a favor by destroying the pathetic species and its even more pathetic ruler." Vilgax attempts to strike again but Nega Ben becomes Articguana and freezes Vilgax in his tracks. He quickly turns to see what his good twin is indeed doing who tells his evil twin he reprogrammed the bomb to destroy the ship.

Angered the evil Ben and good Ben fight one on one with Nega Ben proclaiming, "Never thought I'd say this but Ben Tennyson it's time for you to die!" Nega Ben transforms into Fourarms while the good one becomes Diamondhead and they fist fight. Both Bens are evenly matched in strength but the evil Ben proves to be more skilled in unarmed combat. He boasts that with all the worlds he conquered Nega Ben learnt over two dozen alien martial arts. Which the good Ben finds completely uncool however Ben knows some form of unarmed combat and can hold his own. The two Bens continue to fight it out with neither even seems to remember or acknowledge the bomb. However if neither Ben doesn't end the battle soon it will go off in about ninety seconds. However all both Bens can think about is defeating each other but the tables turn. The good Ben gets the upper hand and knocks Nega Ben soaring.

It looks like the battle is won until Nega Ben becomes Lodestar and attempts to use his magnetic powers. The good Ben has to say, "Bad choice of alien dude I'm Diamondhead not Gearhead." With Nega Ben having to say that no one said Ben was the target for the magnetic fields. Ben is suddenly wrapped in metal girders and he falls to the ground with Nega Ben coming to him. Nega Ben then goes to deactivate the bomb to keep it from blowing up and destroying his ship. Nega Ben then reverts to human form and does the same to the good Ben by stomping his foot on the Omnitrix symbol. He then pulls a small but powerful laser blaster out of his coat and intends to end it swiftly. However another laser blast hits it and destroys the gun and Nega Ben looks to see Vilgax thawed himself out. He strikes at Nega Ben like a bull in a china shop. However he also releases the good Ben and orders him to reactivate the bomb and destroy this ship once and for all.

Before he does Vilgax actually orders all hands to abandon ship and an alarm is st off and then all the inhabitants flee with their lives. Nega Ben activates a secret panel which contains a very powerful laser rifle and he attacks Vilgax with it. The blast is so powerful it sends him soaring out of the ship and in to deep space. Although that distraction gave Ben the time to reactivate the bomb and it is starting to go off. Nega Ben has lost and the good Ben tries to save his evil twin by asking him to go with him. Nega Ben refuses and activates an emergency transport and the good Ben is teleported off. The spaceship attempts to soar back into space and the good Ben tries to save his evil twin but it is too late. The ship explodes with debris falling to the Earth and going into space and all Ben does is watch.

Later all of Nega Ben's cohorts are rounded up and are sent on an auto piloted ship back to their universe. A message is also sent saying the evil Ben is dead and that his universe can begin to rebuild and live in peace. At Plumber HQ Ben ponders on how his life would be if he was anything like Nega Ben. As he admits that he and Gwen were not best friends but still loved each other as cousins. Gwen tries to comfort him but it doesn't work but Kevin tries to cheer him up. As he says Nega Ben is dead and their job is over but Ben isn't so sure as he knows he himself wouldn't give up so easily. Which he also doubts the evil Ben will give up that easily as well. However Max tells Ben about his next mission and so he, Gwen ,and Kevin hop to it.

However back in space the black hole was closed but the wreckage of Nega Ben's ship can still be seen. An alien salvaging unit is here to pick it all up and one of the vessels manages to find what looks like an escape pod. One of the crew looks inside it and there he is Nega Ben escaped the wreckage. He is out cold but soon his eyes open to reveal those menacing blue eyes and finally all he does is smile and laughs with the most twisted and sinister evil laugh ever. For Nega Ben did not perish and Ben and his friends might soon find that out the hard way.

Trivia:

 * Ben meets his evil twin for the first time.
 * Vilgax is the one who brings Nega Ben to this universe.
 * Unlike Prime Ben Nega Ben never took off the Omnitrix and is much more skilled than Prime Ben.