A/N: Hi everyone! Rexfan133 here and here is Ben 10: World Walker and I hope you will enjoy this.

This story will feature a stronger and smarter Ben Tennyson. (Ben is now a solo hero in this story, but still gets help from Kevin, Gwen, and Rook on occasion)

I was inspired by SarusRock625 stories (Check him out when you get the chance) and I had this thought of Ben going to different worlds unlike his own to help and be badass as well.

Worlds that will appear; Dragon Ball Z, Naruto, Bleach, One Piece, Danny Phantom, Avatar: The Last Airbender, Teen Titans, Fullmetal Alchemist, The Incredibles, Maybe the DC Universe as well. Possibly more, you are free to suggest.

It's also a harem! Which will have the following girls; Bulma, Fem Vegeta (She will still be named Vegeta), Android 18, Hinata, Sakura, Tenten, Naruko (Fem Naruto), Sakuya (Fem Sasuke), Gaarako (Not official name, if you have a better name, leave it in the comments) (Fem Gaara), Harribel, Nelliel, Rangiku, Rukia, Orihime, Retsu Unohana, Paulina, Sam (They will both get ghost powers just like Danni), Danni (Fem Danny), Desiree, Ember, Toph, Azula, Katara, Raven, Starfire, Oliver Mira Armstrong, Violet Parr, Mirage, Power Girl, Harley Quinn, Batgirl (Cassandra Cain, but not sure), Catwoman, Boa Hancock, Nami, and Nico Robin. Possibly more, you are free to suggest.

Ben will not be very powerful in the start of the story (He's pretty powerful already, but he will face even more powerful enemies), but will gain it when fighting Even more powerful enemies and meeting new friends that will help him.

Warning: Genderbending! (Don't like, don't read!)

Now, on with the story!

Chapter 1: A Hero's Journey (Prologue)

It was a normal day in the streets of Bellwood USA, everything seemed fine to anyone, until an explosion was heard at a bank downtown with a group of robbers popping out of it.

"We go the loot!" One of the robbers said with glee.

"Lets get out of here befor-" The leader of the robbers was interrupted by what appeared to be a flying manta ray right in front of them.

"B-Ben Tennyson!" All three yelled in unison seeing the hero.

"Sorry I'm late," Ben /Jet Ray said with a grin on his face, "If you don't want to get your butts kicked, I suggest putting that money back where you found it!"

RUN!" They yelled as the ran to the left. Ben/Jet Ray just sighed.

"Why do they always run?" Ben/Jet Ray asked himself as he flew after them at full speed. They found a car and pulled out the owner of the car and drove off.

"Oh great..." Ben/Jet Ray said statistically with an annoyed look on his face, They drove as fast as they could, but still saw him coming.

"Shit!" The leader cursed in frustration.

"He's gaining on us!"

"Shut up!"

But he showed up on the side window of the car.

"Look, can we just talk like normal people?" Ben/Jet Ray asked, but the sped up. "Guess not..."

This didn't stop the teen hero as he sped up as well and caught up with them. Ben then shot his laser eyes at the tires which caused the car to spin uncontrollably and crashed into a building. Ben/Jet Ray landed on the hood of the car and a green emerald light engulfed the Manta Ray being. It was replaced by a young Caucasian man with shaggy brown hair that looked about the age of 18 or 19 years old, green emerald eyes, he wore a black leather jacket with green highlights as well as a grey T-shirt with a green number 10 on it, blue jeans, and white, green sneakers, and a watch like device on his left wrist. It was Benjamin Kirby Tennyson, the wielder of the Omnitrix and Savior of the Universe and Omniverse.

"Sorry to crash the party." Ben joked with a grin. The cops came in just in time and Ben jumped of the car.

"Great job." The cop said.

"No prob, glad to help out." Ben said as he saw a raging crowed of people running over to him.

"BEN 10!" The all yelled as well as questions and asking for autographs.

"Crap, gotta go!" Ben yelled as he turned to XLR8 and zoomed back home.

(Ben's Apartment)

Ben/XLR8 was now in his room and changed back to normal.

"What a day." Ben said as he laid on the bed tired. "So tired."

Ben said to himself, "Saving the world is hard work, but a challenge wouldn't hurt."

Ben said as he about to drift off into a deep slumber. But a sudden light appeared near his bed.

"What the hell!" Ben said as he jumped off the bed reading his Omnitrix to fight this unknown foe, but Ben got a better look.

"Wait a minute, It can't be..."

As the light faded a man appeared in its place, he was very classy looking with black slicked hair that was white on the sides due to his age, and had on a white lab coat that was covered with Steampunk like armor, a metal glove that replaced his dismembered hand, as well as holding a cane to walk.

"Paradox?" Ben said surprised to see his old ally in his room.

"Good evening, Ben!" Paradox said with a smile, "I see you're doing well."

"What are you doing here?" Ben said as he was looking at him strangely, but got serious."Is it Eon, Vilgax..."

"No," Paradox said as he, "I have a surprise for you!"

"A surprise?" Ben asked confused, but Paradox gestured to follow him which he did and disappeared in a flash of blue light.

(Azmuth's lab)

Azmuth was working on something until a blue light appeared behind him.

"I see you've brought him?" Azmuth guessed.

"What's going on?" Ben asked walking over to Azmuth, "Paradox said you had something for me."

"Oh yes," Azmuth said as he came in with a strange looking green gauntlet in his arms.

"Happy 18th birthday!" Azmuth said, Ben was shocked by what he was seeing.

"A-Azmuth. I-I don't know what to say." Ben was so shocked by this. Azmuth took off the Omnitrix and put on the new gauntlet on his left wrist.

"It's the Omnitirx 2.0, a new and improved version of the Omnitrix, It has everything including Evolutionary Function."

"SO AWESOME!" Ben said with a huge grin on his face, but Ben's face softened when he looked at Azmuth, "Thank you, Azmuth, this means a lot."

"You earned it, You may be a cocky punk every now and than, but I see a true hero in you that would put others first before himself, I'm proud to have you use it." Azmuth said with a smile, Ben than hugged the little Galvan which he gave back. Ben let Azmuth go.

"So is that it?" Ben asked wondering.

"Not quite, "Paradox said as he put a hand on Ben's shoulder, "I also have a gift for you,"

"Me and Paradox also added a little something in the Omnitrix 2.0 that you might find interesting."

"What is it?" Ben asked scratching his head in confusion.

"A dimensional transporter." Paradox said, Ben's mouth almost hit the ground. With that everything went black and millions of screens appeared all over the place, Ben was amazed at what he was seeing, all of these were different worlds, one of them included a world of Ninjas, another had Pirates, even a world with everything warring strange black Japanese outfits and wielding swords. Ben was not a stranger of seeing other universes (Hell, he even met his future self for Pete's sake), but this still blew him away.

'Not mundane one bit.' Ben thought while looking at the screens depicting different worlds he could possibly visit.

"It's up to you to help these worlds." Paradox said with a serious look on his face, "Are you willing to go?"

"Sure, but what about Mom, Dad, Grandpa, and Gwen?" Ben asked.

"I told them everything," Paradox told him, "They wanted to wish you good luck."

"And what about clothes?"

"I created something just for that. Omnitrix: Activate Outfit mode!" Azmuth said

"Outfit mode: Activated." Said the Omnitrix 2.0 as a hologram of different outfits showed up (A green puff jacket for cold weathers, a green tuxedo, a strange green bodysuit Ben didn't think looked all that great), Ben then pressed a button and he wore a pair of green and black swim trunks.

"That's amazing!" Ben admitted to Azmuth.

"I knew you like it." Azmuth said with a grin.

"Well, Guess I'm ready!" Ben said with a grin on his face,

"Omnitrix: Activate Dimensional transporter!" Azmuth commanded.

"Dimensional transporter: Activated." The Omnitrix 2.0 said as Ben raised his left arm and a green light shot out of it which also opened a door to another world.

"It's Hero Time!" Ben said as he jumped into the portal with it closing behind him as well.

"Good luck, Ben." Both Azmuth and Paradox said with smiles.

TBC

A/N: Hope you enjoyed this first chapter of Ben 10: WW, I will also add a poll for which world you want Ben to visit, Make sure to fave, follow, and review! I know the chapter might be a little off with the grammar, but I had this idea in my head for so long and I just had to write it out and make it a story ASAP!

Also, for people who want a better description of the Omnitirix 2.0, It's a green gauntlet like device (like the Ultimatirix), but it has gold trimmings as well and it will lock Ben in alien for and only Ben and Azmuth can activate it, but it still times out. It also has voice command. (Aliens, Dimensions, Outfits, and so on)

If you are wondering where I got the idea for Ben's Outfit go on Google and you will see a picture of Ben which I got inspired. (Ben Tennyson from Rise Of Heroes on Ben 10 Fanon wiki)

I hope that helps and see you later! And if you have fan aliens you want to see, leave them in the comments.