Author Notes:It's me Jerry Ruffin here with a new story this one is non canon to my The Infinity Legion series. This is a Ben 10 and Akame Ga Kill crossover, I read other Ben 10 and Akame Ga kill crossovers. I decided to do one on my own, the authors who make theirs abandon them.

But my is gonna be different from the other authors, Ben will killed his enemies instead letting their live because in the Akame Ga Kill universe is way different his own.

The story takes place after Ben 10:Omniverse. Ben and aliens that appear before Omniverse will have their appearance from Alien Force and Ultimate Alien. His Omnitrix from Omniverse will have the ultimate and Omni-Kix functions.

Disclaimer:I don't own Ben 10 or Akame Ga Kill:They belong to Cartoon Network and Square Enix.

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Enjoy!


Chapter 1:A World of Corruption

''Where I am?''

Waking up was a 16-year old boy. He has brown hair, green eyes, and slightly pale skin. He wearing a shirt t-shirt with a green jacket with a white stripe and the number 10 on the left side, blue pants, black and white shoes and finally green, white square wrist watch on his left wrist.

This boy is Ben Tennyson, the greatest hero of the universe with the powerful device on his wrist, the Omnitrix, which gives the power into many alien species. He saved the universe multiple times, defeated Vilgax and many more villains, stopped the Time War and defeated Maltruant.

All he remembered, Ben was enjoying smoothies with Gwen, Kevin and Rook, until black out.

Ben got up and looked around he was in a forest.

''Okay.'' said Ben. ''Where am I? Doesn't matter, I gotta call Kevin, Gwen, and Rook have located my whereabouts.''

Ben activated his Omnitrix and turned on the telcommunications function.

''Hello Gwen? Kevin? Rook?''

Static.

''Hello? Gwen Kevin Rook?''

Again static.

''Great.'' sighed Ben. ''No signal, that means I'm in another dimension.'' he realized.

He walked around the area trying to figure how he get here and find a way home.

Before he wondered how to get back home he heard a roar. He turned around to see a giant monster with 3 heads to attached to one body, with 4 legs and a long giant tail and giant wings folded into its back.

Ben smirked knowing what time it was. ''IT's Hero Time!''

He activated the Omnitrix face plate scrolling through the holographic wheel looking for the icon he wanted the faceplate of the watch opens the dial popped out and he slapped it back down. His body was shrouded in a brilliant emerald green light. When the green light died down standing in Ben's place was a twelve-foot-tall, humanoid dinosaur-like alien with brown, reptilian skin, and a tan underbelly and underarms. His hands had no claw or did his elepantine feet. The Omnitrix was on his chest.

''Humungousaur!'' he shouted.

Humungosaur charged at the 3 headed monster. He grabbed two of the monster's heads as the middle one bit into his shoulder causing him to yell in plan. Humungosaur trying to ignore the plan held into the 2 heads and started swinging them around and letting go, sending the giant monster further into the forest. Humungosaur gritted his teeth as he started growing to the height of 65 feet with hardened plated forming on his chest and arms. With spikes growing from top of his head, to his knuckles, from his back all that to his tail.

He charged at the monster hearing it roar loudly and seeing its wings unfold. Humungosaur saw the creature flapping it's wings and it started floating off the ground. Knowing he'd be at a disadvantage quickly grabbed onto it's tall. ''YOUR NOT GOING ANYWHERE!'' yelled Humungosaur pulling the 3 headed monster back onto the ground, slamming it onto the ground, while launching into the air, and landing onto the monster.

He grabbed the head on the head on the left, stepping on its long neck, he pulled with all his might and tore head off. The monster roared in pain and pushed the Vaxasaurian away clutching its headless work.

''I don't have time to play you anymore, so it's time we end this.'' said Humungosaur, he tapped the Omnitrix symbol on his chest and four metal spikes popped out and a green light started spreading throughout his body.

When the light died down. Humungosaur was now a 20 foot Ankylosaurus, looking much more buff and muscular than its his pre-evolved form. He now had camo green skin instead of brown and beige. A dark blue, spiked turtle shell covered his chest, torso and back. His helmet has 3 silver spikes running down the top and 2 downward pointing black horns on the side. His back armor has long spikes running down each side, his plated chest and torso are dark blue with five spikes on each end and his tail has a black mace on the end with silver spikes. His ferocious and menacing appearance was amplified by his knuckles having silver barrels visible on them.

''Ultimate Humungosaur!''he shouted.

Ultimate Humungosaur urged the 2 headed monster to come at him and watched the monster charge him. Ultimate Humunogsaur lifted up his arm and his hand morphed into a rocket launcher as missiles shot out of them towards the monster. The 2 headed monster got closer to him immediately turning around his wrecking ball of tail connected with monster's body and immediately he tied the 2 heads into a knot before morphing his hand into a rocket launcher and blowing the monster's body to bits.'' Good riddance.'' he replied seeing his arm transform back.

Ultimate Humungosaur looked around the woods before deciding which director to go. He walked for awhile before seeing a trail and knew it twas the way to civilization, but before walking over the trail the hyper-evolved Vaxasurian slapped the Omnitrix symbol and was transformed back into Humungosaur, then he hit again was transformed back to Ben. He tightened his grip on his jacket and followed the trail. A young woman with blonde hair, giant breasts, black top with chapless white pants, with black underwear hopped out a tree and smiled widely.

''Interesting, a boy who can turn into Danger Beasts.'' responded the young woman this Leone she's a part of assassin group known as Night Raid and decided to follow the Omnitrix wielder for a while then headed back to the hideout.


Ben stuffed his hands in pockets before he saw something in the distance, a giant city that he never saw anything in his universe. Ben turned around seeing nothing behind him, but it felt like someone was watching him. Shaking off that feeling he walked through the city's gate and looked at how amazing it was. There was a giant castle in the background with a bunch of buildings with each other as he journeyed deeper into the Capital. Throughout his walk people would often steal glances at him or whisper about his clothes.

Ben sighed and continued his walk throughout the giant city that was new to him. His stomach started to glow bad for him, he didn't have any money for food. He walked into alley way and transformed into Diamondhead and to find a jewel store, he walked out of store with a big of 1,000 gold coins.

He looked for a place to eat and he walked inside. Everyone stopped talking, and eating to look at the strange boy who walked inside. Ben glanced around walked straight to the counter.

''What can I get you?'' the cashier asked him.

''Chicken.'' he responded.

The cashier slid him chicken and he sit down on a table and ate his food after he was finished he left the cafe.

Ben notices was night time and he looked a hotel for the night.

He kept looking for a hotel before he kept looking he heard some fighting coming from a courtyard. He decided to check it and run off to find it. ''I'm see what going on'' he said to himself.


On the courtyard a young man with brown hair, green eyes, wearing a long white coat over a beige vest over a white, buttoned shirt with a sword this is Tatsumi of Night Raid he fighting a man with a weird object on his forehead, headphones with a cloak he also wearing two long daggers from his armsleeves. This is Zank the Executioner Tatsumi and the rest of Night Raid was sent on a mission to kill him. Tatsumi fought him he had blood on his body,

Zank had a scratch on his cheek and blood came out from Tatsumi's sword swung.

''It's about time I'm one hit!'' grinned Tatsumi then blood came from his back. ''A expert executioner, huh a expert wouldn't miss neck so head hunter you turn out to be.''

''Shut your mouth!'' shouted Zank he was charging at Tatsumi and who was now on the ground.

Before he can charge at the battled Night Raid member a new fighter got between.

''I think you've the one should your mouth!'' the fighter was Ben Tennyson.

Tatsumi and Zank looked at teen hero between them.

Zank grinned. ''Oh Ben Tennyson is here to stop me Zank the Executioner.

''Wait, how do you know my name?'' asked Ben, confused. ''It's that thing on your head?''

Zank pointed to the device on his forehead. ''That correct, this is my Imperial Arms, Spectaor, it allows me to enter people's minds and make them see illusions of whatever I want'' he explained to Ben and Tatsumi.

Ben looked down at Tatsumi. ''Leave this guy to me.''

Ben activated his Omnitrix and slammed the dial down he was bathed in a flash of green light that may Tatsumi and Zank shield their eyes. When the green died down standing in Ben's place was a silicon-based life form alien made of super-hard-green/blue diamond-like material. His body, torso, and the top of his head consists of indigo crystal which has black lines and dots over it. There were six crystal shards on his back. His eyes were green and he wears the Omnitrix symbol on his chest.

''Diamondhead!'' he shouted in a deep raspy voice.

Diamondhead's hand merged into a long sword which shined revealing Zank's face on the blade.

''This is gonna be fun.'' laughed Zank and launched at Diamondhead which resulted in them clashing. Diamondhead and Zank watched as sparks bounced off their blades then clashed again.

Tatsumi was watching the fight and was shocked how Ben transformed into Diamondhead. ''That guy is an Imperial Arms User. He can be transformed into Danger Beasts. I've never seen a Danger Beast like that before. It is like he's on my side.'' he thought.

Back with Diamondhead and Zank. ''Yours a lot stronger than you took!'' Zank to the Petrosapien who pushed him back.

Diamondhead held up his other hand and shards started appearing and started launching towards Zank who started slashing them knocking them off course. Diamondhead gritted his teeth and slammed his hands on the ground and made a trail of spikes and slashed Diamondhead, but in the knick of time he threw up a diamond shield, which had a crack in it. Zank smirked in satisfaction, but realized his swords also had a crack in it. Diamondhead's swords slashed against Zank's swords, but after they crossed for the final time, Zank realized he was bleeding and saw both his arms had been chopped off along with his blades that were shattered.

''You said you were an executioner right?'' Diamondhead asked him blood leaking down his diamond sword.

''Ye-yes, for the Imperial Army and there is evil and corruption of the Empire. I was able to punish the wicked. Now with my Imperial Arms, I punish anyone who doesn't respect the Prime Minister!'' yelled Zank.

''Punishing the wicked? Sounds to me like you're trying to play God, and believe me I can show what God looks like. Who the heck are you take down to people who are beneath you. Your injustice you were doing isn't different from the path of a murderer. I'm a hero who has never taken a life before cause I always thought people deserve a second chance in life, but you. You've taken my ideal and stomped all over them and for that! I'll kill you.'' stated Diamondhead and sliced Zank's head off.

Tatsumi looked at him shocked and surprised that Diamondhead killed Zank before he and fellow teammates could. ''That guy just killed Zank. I was right he is on my side maybe he can join us and stop the Empire.''

Diamondhead held his hand soaked in blood and swiped his hand making the blood splatter all over the floor. He was about to help Tatsumi back on his feet when he heard the wind pressure change and immediately dodged when he saw a blade aimed at his head. Diamondhead hopped back when he got a closer at the person it was a girl with long black hair, red eyes, a black shirt, red tie belt, a black skirt, as well red gauntlets and black gloves. If she wasn't try to kill him, he'd definitely be interested in her.

''Akame?'' inquired Tatsumi.

The black haired girl looked at the Petrosapien and spoke. ''Danger Beast eliminate.''

When she said that Diamondhead heard a familiar noise and saw his Omnitrix symbol beeping. ''Oh no.'' he remarked. And in a flash of green light he was back to being plain old Ben Tennyson. ''Seriously Omnitrix, you couldn't have chosen a time to time out?!'' asked the brunette angrily.

The girl in black looked around and couldn't find where the Danger Beast went. ''Where did that Danger Beast go?'' She looked at the boy in front of her and noticed it was the exact same spot the monster was standing in. She looked at him which turned into glare.

Ben then noticed the look in her eye and started fiddling with the Omnitrix. ''Come one!'' he shouted when he saw her sword raised and finally he slammed the dial and in a blinding green light. In Ben's place was a hulking, broad shoulder alien covered in natural, yellow armor on his back, shoulders and the backs of his arms. He was mostly white with black on his upper half. Each of his hands possess claws. His teeth were human-like, his eyes were green. He wears the Omnitrix symbol on his chest.

''Cannonbolt!'' he shouted in a deep raspy voice. The blade hit the yellow plate on Cannonbolt's arm.

''Another Danger Beast. ''I'll eliminate you!'' shouted the black haired girl pushing her blade forward.

''Stop it, I'm not the enemy!'' exclaimed Cannonbolt trying best to convince the girl in front of him.

''Akame he's not our enemy!'' yelled Tatsumi.

The black haired girl didn't say anything as she hopped back and stood ready for him. Cannonbolt sighed. ''I'm not your enemy, since you won't listen to reason guess I'll convince you.''

The girl rushed him with her sword ready, Cannonbolt hit the ground gaining speed and taking the form of an armored ball. The girl launched off the ground and clashed with the ball and noticed it was pushing her back. Cannonbolt pushed her away and started rushing her in his ball form. Cannonbolt pushed her away and started rushing her in his ball form. The girl had a hard time trying attack him in that ball from of his.

Cannonbolt unrolled himself and started at her. ''Are are done yet?'' he asked the girl.

''Not even close.'' she said with glare enveloping her face.

The girl ran at him as he hopped back into his armor plate ball rolling towards, Tatsumi got back on his feet and tried to stop the fight. When a figure hopped in between the two fighters. ''I think that's enough, you two.''

The black haired girl stopped in her tracks as well as Cannonbolt who unrolled himself. ''Uh, who are you?''

''I'm one of their friends, I'm.'' said the blonde hair with the black top and giant breasts. ''This Akame, and the boy with brown hair Tatsumi.'' she introduced them as Akame and Tatsumi who was still bleeding from Zank. Akame sheathed her sword and grabbed Zank's Imperial Arms that was still to his servered head.

''Why'd you intervene, Leone?'' asked the black haired girl known as Akame, plainly.

''Because you weren't winning against him. He was pushing you, Akame plus I've been watching him all day. He can turn himself into Danger Beasts.'' revealed Leone that she followed the boy all day.

''So it was you I felt earlier.'' said Cannonbolt as he slapped the Omnitrix symbol on his chest turning back the green eyes, brown hair, green number 10 jacket boy known as Ben Tennyson.

''Yeah, I saw you fighting a Hydra and followed you since then and saw you killed the Executioner that was causing us trouble. It was actually our mission to annihilate him.'' she responded then pointed to Akame with a bland face.

''That doesn't explain why intervened, Leone.'' reported Akame.

''We can use him against, the Empire and Esdeath.'' said Leone which made Akame and Tatsumi think. ''Hey kid, what's your name?''

''I'm Ben Tennyson and what's wrong with the Empire? And who's Esdeath?'' asked Ben.

''The Empire is corrupted and there is great evil around the world and Esdeath is a general working for the Empire and she goes around the world turning it into ashes in name of of the Prime Minister and we haven't found a way to defeated them until now.'' explained Leone.

Akame looked around and heard footsteps coming to them. ''Leone, Tastumi it's about to time.''' she spoke.

''I'll grab Ben and you grab Tatsumi then we can spit.'' she said, but before could, Ben lifted up his arm revealing the Omnitrix and activated it and slammed the dial down.

Standing in Ben's place was a semi-armored Velociraptor-like alien. He has black orbs on his feet, black tail with five blue stripes, and bulky claws on his fingers that can only open and close. He wears a black cone-like helmet with a protective visor that slides over his face which covers a blue face with green eyes, black lips and stropes running down and in between eyes; the rest of his head's features are unknown. He wears a dark black bodysuit and turtleneck-like shirt with a white stripe on the center and he was muscular. He wears the Omnitrix symbol on his chest.

''XRL8!'' he shouted in a raspy voice.

XRL8 grabbed Akame, Leone and Tastumi and zoomed off in a black and blue blur, leaving Zank's dead body for the people to see.


A/N: Well that is readers for the first chapter of my Ben 10 and Akame Ga Kill crossover. Tell if you guys like it or not. Leave me your thoughts in a review of my inbox.

There will be OG and Reboot aliens will appear in the story. Yeah Ben has the Ultimates back and The Omni-Kix armor function from the Reboot. I like Ben's design from Alien Force and Ultimate Alien because I like it better before Omniverse.

Also Ben will an harem in this story Akame, Leone, Sheele and Chelsea. I will look for Ultimate and Omni-Kix forms on Devianart.

I will continued my The Infinity Legion:Fairy Tail story.

In the chapter Ben will meet Night Raid and joined them, Professor Paradox will appeared and will tell Ben that he was the reason was the Akame Ga Kill universe there will longer chapters after chapter 2.

Well that's all I can tell you see you guys in next the chapter bye for now.