Hi this is Artzilla here and this is High school DxD aliens among devils and i going to give it my best shot on this story and I hope you like it. and if you do not seen high school DxD or Ben 10 sorry for the spoilers

FYI i own nothing except my OC aliens and yes i'm going to add them to Ben's Omnitrix. and the other oc aliens belong to lewarmus prime 2016, ztak1227 and alorix.

It's not everyday that you can be a hero that is if your name is Ben Tennyson and that you have an alien watch too. now we see Ben in Mr. smoothie's as every day Ben is wearing an all black shirt with green line in the meddle with the wight number 10 on the chest he has light brown cargo pants with light green and whit shoes and he has emerald green eyes and he is 16 years old. you see he's now bored out of his skull sens nothing's happening when Ben created the universe with help of his partner brook blonko wen they defeat maltruant and saved the created universe. and he sits with Rook blonko himself with one of ben's friend's Zackary. R. Orion or zack. Rook wears a very durable blue-and-black Proto-tech-armor and on his shoulder is the proto-tool. zack is a 19 year old boy he wears a hooded black long coat jacket with red flames like but with blue lines on his sleeve and bottom and wearing an even a symbol of a robotic logo on his back of his wears a pair of black gloves with a blue shell on the backs of the hands, a red T-shirt with a wide collar and a white tank top inside and blue pockets a bit baggy pants and he wears a black boots with silver and blue steel-toed. he wears a blue ultramatrix on his left rest. They are now relaxing and drinking somr smoothie's.

Ben: man this stinks nothing good is happening sense we created the universe and beat maltruant.

Rook: yes and there's nothing happening in undertown lately.

Ben and rook has spoke to soon en explosion had gone of on the corner of the building and walked out of the corner comes Fistrick. He has a white skull painted on his face, has orange spikes, wears a black tank top with a skull on it and has orange pants.

Ben: I spoke to soon did I.

Rook: yes you did.

zack: Obviously.

Ben: Hey Fistrick!

Ben, rook and zack ran up to him Fistrick turned and spotted the three

Fistrick: hey dude long time no see huh.

Ben: ya and are you ready for..

When Ben slam the core of his watch a green light engulf him and change him into a humanoid rooster with razor blades on his four arms with the Omnitrix on his green vest on the center of the chest.

Kickin hawk: KICKIN HAWK!

zack: and a little help with. . .

as zack said that he slams his ultramatrix down he is engulf with blue light changing him into a tree-like humanoid with an indigo dome on the head with leafs on the shoulders and elbows with mini-domes on the four arms shoulders and legs with the ultramatrix symbol on the chest.

?: ULTIMATE. P. SWAMPFIRE!

when kickin hawk and ultimate. p. swampfire charge and Fistrick was sent flying.

Fistrick: ugh, what hit me? (spotted U.P. swampfire and kicken hack) hey bros, been a while.

U.P. swampfire: yeah dude your about to get a double whammy from my bro and me.

Fistrick: not this time you don't.

Then he pulls out a purple grenade he then push the button and throw it at them and then it explodes en black portal sucking them into the portal.

Kickin hawk: what the!?

U.P. swampfire: what is that!?

Fistrick: oh nothing just a dimensional bomb that opens a ref through space and time and it's just for you two. (evil smirk)

As he said that the two aliens got suck in two the portal and the portal close it self.

Rook: BEN!, ZACK!

Fistrick: now what to do with you.

Fistrick starts to charge at rook when he try's to punch him rook dodge his attack and them Fistrick got shocked by rook's proto-took in the back and past out.

Rook: Rook to plummer base this is rook blonko calling in I need some insistence to take Fistrick in I'll explain everything there.

In the black portal

Both ben and zack in there alien forms going through the portal they starting to feel strange and stronger and they hear a voice in the portal.

'help them . . . .'

Kickin hawk: hey zack do you hear that?

P. Ultimate swampfire: ya but where is it coming from?

'please help them fight the evil protect them from the upcoming war and prevent it.'

before they said anything a blinding shins them and all went black.

And done for now sorry this story is short but i'll try to make the other ones longer as i can and i need some votes on ben's harem and any pairings on zack let me know. like, dislike, fav and i'll see you all later RRRRRRROOOOOOOAAAAAAAAARRRRRRRRR

Hey everyone artzilla here, I know that some of you are requesting for ben to be in a crossover, but I'm sorry but we can't, me and prime are writing for austin, koan and zack, ben will be with the boys but nothing else, there is already thousands of crossovers featuring ben only, we are doing this because we like to. But there will be only one ben crossover and it's linking to rwby when it's finished, until then no ben crossovers.