Author Notes: Hey you guys it's me Jerry Ruffin with a brand new story. Here's a Ben 10 and Pokemon crossover.

I've read other Ben 10 and Pokemon crossover stories with the authors keep Ash the Omnitrix and most with the actual Ben Tennyson in them. But none of them of Ben traveling to the Pokemon world there was one but the author deleted it.

So I've decided to do one one of my own with the franchises meeting each other.

The story will take place after Ben 10:Omniverse.

The Ben 10 characters will have their appearances before Ben 10 Omniverse will have their Ben 10:Alien Force and Ultimate Alien appearances.

Like before Ben's Omnitrix will the Utimate and Omni-Kix functions.

Disclaimer:I don't own Ben 10 or Pokemon they belong to Cartoon Network and The Pokemon Company.

Enjoy!

Chapter 1:Welcome to the world of Pokemon

Ben's House, Bellwood

In the back of the house were Ben Tennyson, Rook Blonko, Gwen Tennyson, Kevin Levin, Julie Yamamoto, Kevin's pet Zed and Ship were packing their bags and bringing them to the Proto-TRUK. The group decided to take an interstellar vacation in another dimension together. Both Ben and Julie got back together.

''I can't wait to ready to go on this vacation together.'' said Ben with a smile.

''Me too.'' agreed Julie.

''I agreed as well.'' replied Rook.

''It's been awhile since on together.'' responded Gwen.

''Yeah.'' stated Kevin.

''Ship Ship.'' spoke Ship.

Zed then just bark.

The group went inside the Proto-TRUK as shifted into its spaceship mode.

Unknown to them a jet was behind the Proto-TRUK. Inside the jet were Billy Billions, Dr. Amigo, Captain Nemesis, Kangaroo Kommando, Charmcaster and, Mazuma were following them behind.

''It seems like our enemies are going on vacation.'' said Billy as he was talking to a hologram image of Vilgax.

''Exactly. Just keep following them.'' replied Vilgax in his raspy sinister voice.

''We will have our revenge on our greatest Ben Tennyson.'' replied Dr. Amigo.

''And his friends.'' added Captain Nemesis.

''Meaning going to another dimension.'' responded Charmcaster with a smirk.

''Yeah.'' agreed Kangaroo Kommando.

''You have our word, Vilgax.'' stated Mazuma.

Then Vilgax grinned. ''Just don't mess thing up.'' as his hologram disappeared.

With Ben and the gang. Rook started the second engine and a portal appeared in the sky both the heroes and villains flew into the portal and they were gone.

Rook landed the Proto-TRUK on the ground and shifted into its truck mode. The heroes walked out of the spaceship. They looked around to see they were at a beautiful grass land.

''Wow this is pretty.'' smiled Gwen.

''I know, right.'' agreed Julie.

''You're right this place is pretty.'' said Kevin.

Then just in a butterfly with beautiful wings was flying by.

''That butterfly was pretty cool.'' said Ben with a smile.

''I agreed.'' replied Rook.

''So what do we do now?'' asked Gwen.

''I just scanned a city not far from where we are.'' answered Rook.

''Then let's go. And we can get information about this dimension.'' responded Ben.

''Good idea, Ben.'' Kevin agreed with the alien hero.

Everyone went back inside of the Proto-TRUK and drove off for their new adventures.

Kanto Region, Pallet Town

Meanwhile a 10-year-old boy named Ash Ketchum along with his first Pokemon Pikachu were running towards Professor Oak's lab. They were running and until they finally arrived at the lab Professor Oak was packing a suitcase in his car.

''Professor Oak.'' called out Ash.

Professor Oak turned around to see the young Pokemon trainer. ''Oh is you Ash.'' he said.

''So what do wanted to talk about Professor Oak?'' asked Ash.

''Do you remember Professor Cerise?'' asked Professor Oak.

And Ash answered. ''Wait that's Chloe's father, right?''

''That's right.'' answered the Pokemon Researcher. ''You see, this young Professor I know is opening a new laboratory in Vermilion City today.'' he explained.

''Really?!'' exclaimed Ash with excitement.

''That's right, so I figured that I'd invite you to its' opening ceremony.'' replied Professor Oak. ''You are going, I take it?''

''Of course!'' responded Ash in unison.

Delia also comes and stated. ''Ash. I just came to bring your lunch, but what a great thing I just heard! There are plenty of delicious sweets and stylish shops in Vermilion City.''

''Wait, Mom is coming as well?'' asked Ash confusion.

Professor Oak, Professor Oak and Mr. Mime got in the car.

''Let's get going!'' cheered Ash's mother.

''Mime, Mime.'' proclaimed Mr. Mime.

On the road to Vermilion City, Ash and Pikachu are having lunch in the backseat as Ash looks at the Pokemon outside. Professor Oak asked. ''Still a Pokemon lover, I see are you still working toward becoming a Pokemon Master?''

''You bet!'' answered Ash. ''I am definitely gonna be a Pokemon Master together with this guy!'' he grabs Pikachu in the air and he replied in unison.

Once they arrive at Vermilion City, Professor Oak stops in front of the new lab. ''I'll go park the car, so you can just go ahead.'' told Ash.

''Okay, Professor!'' yelled Ash.

Eager to have a look around, Ash rush up the fleet of steps, only to be stopped by a yellow puppy Pokemon called Yamper, who is angry at the sight of the trainer.

''What is that Pokemon? I think I have never seen it before...'' admitted Ash.

Ash is then overcome by the Electric puppy's cuteness and tries to pat it. He eventually catches it, only to receive shock for his efforts. Ash then fall on the ground.

Yamper, I'm home! both Pikachu and Yamper turned around and they saw a girl in a school uniform walking towards them. ''Huh a visitors?''

Yamper is close to the girl. The girl then notices the boy lying on the stairs and says. ''I'm sorry, but my Yamper doesn't like to be petted by strangers. I am Chloe, and you are?'' she questioned.

''Chloe? Is that really you? Ash suddenly gets back up and inquired. ''It's me, Ash, do you remember?''

''Ash?'' gasped Chloe as she hasn't heard of that name for 3 years. Chloe suddenly hugs Ash. ''I missed you a lot. Why didn't you bother to contact me?''

''I'm sorry I've been busy.'' explained Ash. ''So who's that Pokemon?'' he pointed to Yamper.

''It's a Yamper and he from the Galar Region.'' answered Chloe.

''Galar Region? asked Ash in confusion. ''Where is that.''

''It is close to the Kalos Region. So what are you doing here?'' asked Chloe.

''I'm here since Professor Oak asked me to come to see the opening of the lab.'' answered Ash.

''I see, since I still have homework to do, so I'll see you later.'' said Chloe as she and her Yamper left.

Professor Oak arrives. ''Ash. You'd better hurry up or you'll miss the opening ceremony.'' he replied.

''Okay.'' responded Ash. As both him and the Professor walked inside of the lab.

They see Professor Cerise standing on the stage. Then he announced. ''Thank you for being so patient. I am Professor Cerise, and I'm the chief here at Cerise Laboratory, which is opening today. I am most grateful to see so many of you here so far away. Now then...''

Professor Cerise snaps his fingers, and the light of a device starts to glow and a picture of the Earth appears.

''As you all know, Pokemon are the strange, strange creatures that live on the planet. In the forests, in the skies, in the seas...you can find them all over the world. Humans and Pokemon live together in this world, forming diverse kinds of bonds. Here at Cerise Laboratory, we wish to observe and analyze everything about these mysterious Pokemon, so that we may deepen our understanding of them. To know Pokemon is to know the world. I believe this will help make the world of a better place!''

The others are giving Professor a clap, and upstairs. Chloe is still doing here homework while watching Yamper, who is sleeping on the sofa. ''I wondered will Goh be here now.''

Just then, there is a red exclamation mark on one of the screens in the lab. ''What this?'' demanded Professor Cerise.

He starts to type on the computer. ''From this airflow, temperature, humidity, and altitude... this just my prediction, but in roughly 20 minutes, an exceedingly rare Pokemon will appear at Vermilion Port!''

''A rare Pokemon!'' cried Ash in awe.

''What do you think, Professor Oak?'' Professor Cerise questioned the old Professor.

''It does seem pretty big..'' he answered.

''Professors! ''I'll go have a look!'' yelled Ash as he and Pikachu ran out of the lab, much to their confusion. The others are thinking that it may be a Legendary Pokemon as they will rush out as well.

Both Ash and Pikachu keep running as they notice a black cloud in front of them. Suddenly, it appears to be a Lugia.

''A Lugia!'' shouted Ash in unison as he rushed towards the direction where it is. After it lands on the ocean.

''I finally found Lugia.'' said Ash and a 10-year old boy named Goh.

Both Ash and Goh looked at each other. ''Goh, is that really you?'' asked Ash.

''Do I'd know you?'' questioned Goh.

''It's me Ash, do you remember?''

''Ash, is really you!'' cheered Goh. ''So came here to catch Lugia?''

''Yeah.''

Lugia notices Ash and he recognizes the boy.

''Lugia, let's battle!'' exclaimed Ash.

And Lugia snaps out of the trance and nodded.

''Pikachu! Thunderbolt!'' yelled Ash.

Pikachu leaped into the action, launching a Thunderbolt. Lugia shakes the attack off replies with a flash of Aeroblast before flying off.

''Pikachu!'' cried Ash and then they decided to chase after Lugia. Ash can hears hid voice. ''Hop on, like you did before.''

Ash and Goh jumped on Lugia and they flew off.

''Ash, you know this Lugia?'' asked Goh.

''It seems know me.'' he answered.

Lugia uses Telepathy and replied. ''Did you forget our previous encounter? If it wasn't for you, the world could have been in danger because of the Legendary Birds.''

''Wait, are you the same Lugia that we met in the Orange Islands?'' questioned Ash. And the Pokemon nodded.

Lugia flies up even higher to join a flock of passing Fearow. ''Wow...so awesome.'' responded Goh in awe.

Then Lugia descends suddenly towards the ocean.

Lugia uses Hydro Pump to blast a hole into the water surface and soars through the wall of water and into the oceanic depths, teeming with Water-Type Pokemon. A school of Horsea takes the boys surprise, almost causing Ash and Goh to run out of air. Luckily, Lugia emerges from the water and takes to the sky once again.

''Meeting so many different Pokemon surely is the best.'' stated Ash.

''I know.'' agreed Goh.

After that, Lugia lands in a field of flowers, and they see a lot of Grass-Type Pokemon in front of them. Lugia roared. ''I never got to thank you for all the hard work that you have done. Which is why I offer you a chance to capture me.'' he reported.

''Are you sure about that?'' Ash and Goh are surprised that the Legendary Pokemon like Lugia want to be caught. Lugia nodded as Ash threw a Pokeball, singaling its capture.

''Wow...and you just caught Lugia like that.'' remarked Goh.

''I know...seeing Lugia again just makes me remember how big the world is...and that is if yo just want it bad enough, you can go anywhere and meet whatever Pokemon you want.'' inputted Ash.

''Of course we, can meet them. And I wanted to do researched on them.'' smiled Goh.

They laughed a little and before they could go back suddenly crashed on the ground from the sky. It is a giant robot and bug-like drones.

''The what?!'' screamed Goh.

''Robots!'' stunned Ash.

Drones scanned the boys and locked on Pikachu. ''Pokemon must be captured by all means.'' Then the big drone grabbed with Pikachu and a sphere in it back.

Pikachu tries to use his attacks but nothing happens. ''Pika.'' he replied.

''Hey! Get back Pikachu right now!'' snapped Ash.

The drones then firing lasers at both Ash and Goh who starting running from the robots.

With the Alien Force

Ben, Gwen, Kevin, Rook, Julie, Zed and Ship were looking around the city Rook had picked the Proto-Truk earlier around the corner before they keep going forward they saw an explosion from a grass field.

''What was that?'' asked Gwen.

''I don't know.'' answered Kevin.

''It sounds like trouble.'' elaborated Ben.

''Yes.'' agreed Rook.

''So what do they do about it?'' questioned Julie.

''Me, Kevin and Rook will handle it. You two and Zed can keep looking around.'' said Ben.

''Okay.'' nodded Gwen.

''You three and Ship be careful.'' replied Julie.

''We'll will.'' replied the boys.

Ship shifted into his Battle Ship mode then Ben, Kevin and Rook flew off towards the danger.

When they finally saw the scene where they saw two 10-year boys were being attacked but none other Vilgax's drones. And the big one a yellow mouse creature in the back dome.

''Vilgax's drones?'' wondered Kevin.

''That's means Vilgax is here.'' said Ben.

''And they're have a hostage and attacking two human boys.'' pointed out Rook.

''Alright, Rook get the kids to safety, me and Kevin will handle the drones.'' responded Ben.

''Right.'' replied both Kevin and Rook.

Ben activated his Omnitrix and slammed the dial he was bathed in a flash of green light died down standing in his place was an alien with an appearance that is similar to an Earth dry cell battery, albeit rounded out. He is black with green eyes, a large white lightning bolt-like stripe spanning from his neck starts to his waist on his front and black sides, positive + and negative - symbols on his back. He had a hole on his head that could release electricity. He wears the Omnitrix symbol on his chest.

''Buzzshock!'' he shouted in a electrical filter voice.

And the three went off to fight the drones.

With Ash and Goh were running away the drones.

''This is bad!'' screamed Ash.

''I know.'' agreed Goh.

Before the giant drone could fired another laser beam suddenly green electricity was firing both Ash and Goh saw Buzzhock.

''What kind villain attacks kids?'' asked Buzzshock.

''Who's that Pokemon?'' asked Ash.

''I don't know and it can talk.'' answered Goh.

Suddenly both the boys were grabbed by Rook and got them to safety. ''Are you boys alright?'' he asked them.

They nodded and responded. ''Thanks for the safe.'' responded Ash.

''Yeah.'' nodded Goh.

Then Kevin appears and absorbs the matter morphed his hands into blades and sliced three of the small drones.

Buzzshock finished off with the last of small drones destroying them in the process.

''Okay, time to finished the big one.'' stated the Nosedeenian/Megewatt.

Buzzshock slapped the Omnitrix symbol and he was bathed into a flash of green light. When the green light died down standing his place was a silicon-based life form alien made of super-hard green/blue diamond-like material. His eyes were green. His torso, and the top of his head consists of indigo crystal which has black lines and dots over it. There were six crystals on his back. He wears the Omnitrix symbol on his chest.

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

''Whoa! How that impossible?!'' proclaimed Goh.

''I don't know that Pokemon can transformed into other Pokemon!'' cried Ash.

Diamondhead held up his hands and shards started appearing and launching at the drone leaving them in various parts. Diamondhead morphed his right hand into a diamon sword and cut the drone's arms.

Pikachu saw his saver. ''Pika, Pika.''

''Don't worry little guy, I'm coming.'' Diamondhead told him. The Petrosapien deflect the laser that drone and reflect the beam at the drone cutting it in half and it was destroyed and Pikachu was falling from the sky.

''PIKACHU!'' panicked his trainer Ash.

''Don't worry kid, I'll get him.'' assured Diamondhead.

Diamondhead slapped the Omnitrix symbol. When the light died down again standing in his place was a semi-armored Veclocriaptor-like alien. He has black orbs on his feet, a black tail with five blue stripes, and bulky claws on his fingers that can only open and close. He wears a black cone-helmet with a protective visor that slides over his face which overs a blue face with eyes eyes, black lips and stripes running down and between his eyes, the rest of his head's features are unknown. He wears a black bodysuit and turtleneck-like shirt with a white stripe on the center. He wears the Omnitrix symbol on his chest.

''XLR8!'' he shouted in a raspy voice.

XLR8's visor went down and rushed off in superhuman speed and he catch Pikachu and returned the Pokemon to Ash.

''Pikachu, are you okay buddy?'' asked Ash.

''Pikachu.'' he nodded.

Then XLR8 and Kevin walked up to them.

''You guys, are alright?'' asked Kevin.

''Yeah, thanks to you guys. Thanks.'' stated Goh.

''You are welcomed.'' reported Rook.

Ash turned to XLR8 and smiled. ''Thanks for saving my buddy Pikachu. Pokemon.''he remarked.

''Pokemon? What a Pokemon? I'm not a Pokemon.'' said XLR8 as he slapped the Omnitrix symbol and transformed back to Ben. ''I'm Ben Tennyson.''

''You're a human. Not a Pokemon.'' deadpanned Ash.

''Whatever you say, kid.'' inputted Kevin. ''Anyway the name's Kevin Levin.''

''And my name is Rook Blonko.'' introduced their alien friend.

''I'm Ash Ketchum.'' introduced the Pokemon trainer.

''And I'm Goh.''

''What you guys can do and where are you from?'' inquired Ash.

Ben, Rook, and Kevin then the young boys about where they from and their history.

''So you have a watch that transformed into alien?'' Ash asked Ben.

''Yeah.'' answered Ben who nodded.

''And you three also part of a space police called the Plumbers?'' questioned Goh.

''Yeah.'' nodded Kevin.

''Yes.'' replied Rook.

''That so cool!'' exclaimed both Ash and Goh.

''I'm starting to like these kids.'' smiled Ben.

''Ditto.'' agreed Kevin.

''Can tell us these Pokemon. Because we've don't have them in our dimension?'' questioned Rook.

Both Ash and Goh nodded and told them about Pokemon, Legendary Pokemon, battles, trainers, doctors, nurses, researchers, Gym Leaders, Champions, Regions, Types, and more.

''That so awesome!'' cheered Ben, Kevin and Rook.

''Anyway we have to get back to the lab. Do you guys wanted to come with us?'' asked Ash.

''Yeah sure why not.'' answered Ben. Both Kevin and Rook nodded in agreement.

''But how are we going back?'' inquired Goh.

''Don't worry something or someone.'' Ben whispered out to Ship still in Battle Ship mode.

''Ship.'' said Ship in a deep voice.

''Wow.'' stated both the young boys.

The five boys climbed aboard in Ship and flew off back to the city.

Unknown to the villains talking to Vilgax were watching the whole thing.

''It seems like our enemies make new friends.'' Billy told Vilgax.

''Don't worry about them. Leave Ben Tennyson and his friends for now. Once we have Pokemon. We will destroy them.'' said Vilgax. As he disappeared.

The villains started to laugh.

It was late evening in Vermilion City the boys who finally meet up with Gwen, Julie and Zed.

They make it to the lab.

''So is this the place?'' asked Gwen.

''Yeah.' answered Ash.

Yamper is excited to see Pikachu again.

Chloe meets up with Ash and Goh.

''Hey, Ash. Oh and Goh you're late.'' moaned Chloe.

''Listen to this, Chloe! We just had a fateful encounter with Lugia!'' exclaimed Goh.

''And I'm caught Lugia!'' yelled Ash.

''By the way, where is Professor Cerise?'' asked Goh.

''Dad is inside with Professor Oak.'' answered Chloe.

''What?! You mean Professor Oak is here as well!'' shouted Goh as run inside.

Chloe notices Ben and the others. ''Oh by the way who your new friends?'' she asked.

''I'm Ben Tennyson.'' introduced Ben.

''I'm Gwen Tennyson.'' introduced Gwen.

''Kevin Levin.'' introduced Kevin.

''Julie.'' introduced Julie.

''And my name is Rook Blonko.'' introduced Rook. He pointed to Zed and Ship. ''And these two are Zed and Ship.

''Me and Goh meet earlier today.'' explained Ash.

Once everyone got inside of the lab. Goh is showing the video of Lugia's wings are flapping.

''Nobody's ever caught footage of Lugia's fins mid-flight this close up before!'' said Professor Cerise.

''That's not even the biggest surprise!'' replied Goh as they show the video underwater.

''Amazing! You two are awesome.'' responded Professor Cerise. ''And you said that you also caught it, can we see it?'' he asked.

''Of course.'' answered Ash. ''But is there a place we can send it out?''

They then go to Cerise Park, a purpose-built greenhouse ecosystem that houses all of the Pokemon. Ash sends out Lugia there and he roars at the humans, after telling him not to worry about the Professors, it nodded and flies around in the place.

''Wow so pretty.'' commented Julie.

''Yeah, I know.'' agreed Gwen.

''That one big big.'' smirked Gwen.

''I agree.'' stated Rook.

''We've seem bigger thing before.'' said Ben and the others nodded in agreement.

''Well, Ash, Goh. I am profoundly grateful for your initiative. You've let me learn unknown secrets about Lugia! So I have a request for you two and your new friends. Would you become research fellows at my Laboratory?'' questioned Professor Cerise.

''Research Fellows?! exclaimed both Ash and Goh in surprise.

''I want you to meet, touch, and speak to all the Pokemon of the world, and then we will deepen our knowledge of Pokemon together!'' offered the Professor.

''Well, we can do it, right? Goh?'' inquired Ash.

''Of course.'' he answered. Goh turned to Alien Force. ''What about you guys?''

The team looked at each other for a moment and smiled then Ben spoke for them. ''We've in too.''

''Oh, so you all accept?!'' shouted Professor Cerise with a joyous expression.

''But coming from Pallet Town to here will be tough...'' reported Delia.

''If so...'' Professor Cerise opens the door and they see a room with five beds. Ash and Goh are excited to see their own dorm.

''Wow...our own dorm'' remarked Ash.

''In that case, Mimey, look after Ash for me okay?'' asked Delia. And Mr. Mime nodded.

After Professor Oak and Delia are in the car.

''Now this is goodbye, Mom.'' spoke Ash.

''Make sure you eat properly. That includes vegetables.'' said Delia. ''Oh, and brush your teeth, and...''

''I got it...'' blushed Ash at how his mother is embarrassing him in front of Ben and the others who chuckled.

''Goh, Ben, Gwen, Kevin, Rook, Julie please after my son.''' begged Delia.

''Just leave it to us.'' said Ben and the others nodded.

Then Chloe came out outside. ''Dad, you ready?'' she asked her father.

''Oh, sorry, sorry. Can't wait just a moment? There just one more final thing that I''m almost forgot about.'' he told the boys.

Back in the lab Professor Cerise took out Bulbasaur, Charmander, and Squirtle the Kanto Starter Pokemon.

''Whoa, Bulbasaur, Charmander and Squirtle.'' smiled Ash brightly.

From Ash and Goh told Ben, Kevin and Rook earlier them about Starter Pokemon in each Region when new trainers at the age of 10 each get their first Pokemon, of three Types:Grass, Fire and Water.

''Goh is making his Trainer debut, but I haven't gotten him his first Pokemon yet. So Goh, who will it be?'' Professor Cerise asked him.

Goh started to choose one. Let's see I'm think I'm chose Charmander.'' smiled Goh.

Charmander to started to smiled.

Professor Cerise smiled. ''Good choice.'' he placed the Fire-Type Pokemon in his Pokeball and handed it over to Goh. ''Here you go.''

''Thanks.'' smiled Goh.

''Good chose for your first Pokemon.'' smiled Ash.

''Thanks, Ash.'' Goh returned the smiled.

Then the two trainers were cheering while Ben and the others were watching them with smiles on their faces.

And their adventures starts now...

A/N:Well that is for the first Chapter of my brand new Ben 10 and Pokemon crossover readers. I hoped you enjoyed this chapter

I've decided to Goh Charmander because should get the Galar Starters include of him.

Ash will also catch the Starters he didn't catch in the Anime like Torchic, Mudkip, Piplup, Chespin, Fennekin, and Popplio. Including two full Evolve Forms of the two Starters he already catch Venusaur and Blastoise.

Ben and the others won't be catching any Pokemon for the story.

In the next chapter all of Ash's companions will appeared and travel with him and Ben and the gang.

Well anyway that it for now see you guys in the next chapter bye for now.