Ben 10 belongs to Man of Action Studios and Cartoon Network

Monster Hunter belongs to Capcom

RWBY belongs to Rooster Teeth and Monty Oum

I only own my OC and Ultimate forms

Dedicated to Braedey95 and CorJayNelson

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Opening - Ben 10 Ultimate Alien Theme

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Jack grumbles as he felt something near him in the bed, which is strange, considering he is alone in the apartment. Deciding to turn and open his eyes, he sees a girl sleeping soundly next to him. she had red eyes in circles instead of pupils, red clothes with silver and black armor covering her body, long red hair mixes with black. She has a silver choker on her neck. Her neck and waist area is covered in red and black substance, similar to that of Malware. Strangest thing is, she has the Nemetrix symbol in her chest area.

"Oh, she must be having a good dream." Jack said as he turns back and resumes sleeping, not aware of what he just did.

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Which lasts for ten seconds as his eyes widened in shock. "WHAT?!" He yells in surprise as he jumps out of the bed and transforms into Great Jaggi as the girl woke up. She yawns and gets out of bed ad stood up. She appears to be equal heights with Jack

"Who the hell are you?! And why do you have the Nemetrix on your chest?!" The Dog Wyvern barks out. She blinks a few times before grinning and placing her hands on her hips.

"How mean of you. Don't you see? I'm the Nemetrix!" She said, much to Jack's shock as his jaw drops. "When you were hacking into me....." She starts.

Flashback..........

When the red light died, a girl in red is seen. She groans as she stood on shaking legs.

"Ughh....." She moans, placing her left hand on her forehead. "What just happened?" She look around and finds Jack sleeping with his back facing her.

"So he must be the one that caused me turn become a human." She said before she yawns. "Welp, better get some sleep. Hopefully he'll understand the situation." With that she jumps on the bed next to Jack and closed her eyes.

Flashback ends..........

"And that's that." She finished.

Jack couldn't believe what that is wrapping around. He knew he manage to hack the Nemetrix into his commands, but he didn't know it work too well.

"Welp, since you're the one that activated me, I suppose I have to follow your orders from now one." She said.

"Huh?!" Jack said as he transforms back to his human form. "Well, I don't know. I wouldn't let people get the wrong idea." He scratches the back of his head.

Nemetrix giggles as she placed a hand on his left shoulder. "Don't worry. I'm sure they'll understand when the time is right." She assures him.

Jack looks at her for a few seconds before taking a huge breath and nods. "Yeah you're right. Thanks a lot Nemetrix." He smiles, causing her to smile as well.

However, their moment is ruined when they hear people screaming and guns blazing from a mile away.

"Jack." Nemetrix said in worry all over her face.

"Don't need to tell me twice." Jack in a serious tone. He opens a window and stands near the ledge. He then looks at Nemetrix, who is beside him.

"Are you ready for this? To turn over a new leaf and save lives?" Jack asks her.

"I was made ready." Nemetrix smiles as she taps the symbol on her chest.

Jack smirks as he said, "Then let's fly!" He and Nemetrix jumps out of the window and falls down. Jack transforms into Rathalos while Nemetrix turns into Omnivoracious. Both predators shriek as they took flight and head towards the direction of the disturbance.

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Rathalos and Omnivoracious lands on a building and deforms back to Jack and Nemetrix. They quickly get to the edge of the building to see what was going on. When they got there, they looked down to see multiple Faunus (people with animal traits) stealing large amounts of Dust in multiple containers. They wore matching uniforms with white masks tinted with red.

"So these guys are the White Fang?" Jack said, causing Nemetrix to look at him in confusion.

"White Fang?" Nemetrix asks in curiosity.

"They're people with animal traits." Jack explains. "I used the  MonTrix to gather data here. They're often discriminated by their animal parts. They used be a peaceful organization until he leader stepped down and a new one took his place, changing their peaceful attempts into violent ones. Now they've become terrorists so they can have the respect that they wanted. They got the respect, but out of fear." Hearing that made Nemetrix clutch her hands in anger.

"Bastards. They didn't have to use force to get what they want." She mutters.

Jack shakes his head. "I'm afraid they're beyond listening now. The only thing we can do for now is prevent them from causing anymore harm and death." He said, making Nemetrix nod.

"Sounds good to me." Nemetrix as she turns to Crabdozer, before she underwent Ultimate Evolution. Her gray shell now has the color orange mixed with it as she grows a huge rhinoceros beetle-like horn in her head. Her back bulges up with few blunt spikes growing on it. And she had the Nemetrix symbol on a red collar around her neck.

"Ultimate Crabdozer!" She bellows.

Jack blinks a few times in shock before remembering. "Oh yeah. I forgot Khyber said that Albedo installed the Ultimate Evolutionary Function on you." He said before he smirks. "Then it's time I do too!" Because he still didn't disabled the Master Control yet, Jack turns into Rathalos as he too underwent Ultimate Evolution.

His red, black, orange and yellow colored body is replaced with green and yellow. He gains an extra pair of wings at the lower part of his original ones. His claws are now enveloped in green flames.

"ULTIMATE RATHALOS!" He shrieks as he spreads all four wings and flies towards the White Fang's direction. "Let's go kick some ass! "

"Hell yeah!" Ultimate Crabdozer said as she jumps from building to building towards the location.

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The White Fang grunts are busy stealing all the Dusts from the containers they could find. As they continued to doing their job of stealing Dusts, one of the White Fang members spotted two things coming towards them.

They looked and sees a rock-like  creature with six legs standing before them and a green and yellow, four-winged wyvern flying above the first creature. The grunts get their weapons out and aims at them until the flying one spoke in a male and strict voice.

"Sorry to crash on your parade. But I'll ask you this; surrender now and no violent action will be used on you. And perhaps, you will gain what you want in time." Ultimate Rathalos said sternly.

The White Fang grunts are shocked it spoke to them. "I don't what the fuck you two are, but if you get in our way, you'll die!" A female White Fang grunt with a panther tail said.

"Come and test your fate then." Ultimate Crabdozer taunts.

"Kill them!" The White Fang Panther grunt said as the White Fang open fired on them. But Ultimate Rathalos took to the skies and unleashes three fireballs, bombarding the soldiers, but not killing them. They aren't bandits he encountered before, the White Fang soldiers were fighting for equality. Meanwhile, Ultimate Crabdozer, rams through any goons she came across with her rhinoceros beetle-like horn. The White Fang goons are shocked when they found out that Dust proved ineffective against them.

Two Bullheads are already firing bullets from the mounted machine guns against them, only for it to be dodged or tanked without taking damage. Ultimate Rathalos roars as he swoops down and slashes one of the engines with his flamed-infused claws, sending of them them crashing to the ground, with all hands on deck still alive, but are out cold.

"Come get some of this!" Ultimate Crabdozer roars in glee as she bulldozed her way through a barricade of White Fang members and tossed a large, empty Dust container towards a another group, knocking them out cold.

Ultimate Rathalos had manage to take down the last Bullhead with Ultimate Crabdozer dealing with the White Fang grunts.

"It's over." Ultimate Rathalos sighs in relief as he devolves back to his base form. Ultimate Crabdozer nods as she does the same.

However, before they could return, they are encased by a purple energy, preventing them from moving. "What the literal f***?!" Rathalos said in surprise.

Rathalos and Crabdozer turns their heads and found a blonde woman with a riding crop. She had glasses with a purple-black cape, black skirt, white top, and black heels.

"You two are coming with me. NOW." She said with authority in her voice. Rathalos curses in his mind. While he could turn into any Monster or Elder Dragon now, he lacks any form to counter telekinesis.

But Nemetrix does.

"Sorry, but we got better things to do other than deal with authorities." Crabdozer said as she turns into Hypnotick, shocking the blonde woman as she turns intangible and grabs Rathalos with her tongue, making him intangible as well as they both disappear.

The woman cursed under her breath as the two escaped from her clutches just as the police arrive to apprehend the White Fang grunts.

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Hypnotick phases through a building with Rathalos as they made their way to an alleyway. "Boy, that was close." Hypnotick said as she turns back to Nemetrix.

"You said it, Nemetrix." Rathalos said as he transforms back to Jack.

"So what do we do now? She probably told the police what happen and might already be looking for us." Nemetrix states.

"We'll cross that bridge when we get there. For now, let's just head back." Jack said.

"Actually," Nemetrix said, fidgeting a little. "I kinda wanna explore the city a bit, of you don't."

".......... *Sighs* Okay. But don't get caught alright?" Jack said, giving in.

"Thank you Jacky!" Nemetrix said before giving him a kiss to his right cheek, much to his surprise. She winks as she turns into Hypnotick and phases through the wall next to him. Meanwhile, Jack rubs where Nemetrix kissed him.

Oddly enough, he felt something in his stomach. A feeling.

A feeling he has never shown after his village is gone and everyone he knew and loved was dead.

A feeling he only shows to the Plumbers and Ben Tennyson.

A feeling he refused to even speak after his heart got cold for disliking people he doesn't trust.

Maybe, just maybe, Nemetrix could fill in that gap.

For the first time, Jack let out a warm-hearted smile as he walks back to their apartment.

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Beacon Academy, cafeteria

Ruby watches in awe as she and the other students there watch a video from their Scrolls that read:

"Green four-winged wyvern and gray rock-skinned insectoid stops White Fang Robbery at Vale Docks!"

After watching the video, they all had one thing in their minds: Who're they? Where did they come from? Is it possible there are more creatures like them out there?

They may never know.

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A few hours after Nemetrix returns, she and Jack are in their room. Jack is seen fiddling with his MonTrix, as if he is trying to unlock a new mode. Whereas Nemetrix is watching a show in the TV.

A few knocks on the door caught their attention. "I'll get it." Nemetrix said as she walks up and opens it. "Hello-" Instantly however, her smile turns into a frown upon seeing who it is.

"What is it Nemetrix?" Jack said as he stood up. However, he soon noticed someone standing in front of the door.

It was the same blonde woman.

"You two are coming with me, whether you like or not. And I'm not taking no for an answer." She said with a scowl and a tone that left no room for arguments.

"Damn it." Jack groans in his mind

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Alien Data

Ultimate Crabdozer

Species: Unknown, predatory species to the Pyronites

Abilities: Resistance to fire increases, now invulnerable to magma and explosives, tougher armor, has a rhinoceros beetle-like for lifting up enemies or act as a battering ram

Weaknesses: Speed decreases, due to her size and weight, she will fall on her side if she makes a sharp turn

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Monster Data

Ultimate Rathalos

Species: Evolved Flying Wyvern

Abilities: Better maneuverability in the air, can launch a fireball three times like Rathian, extra pair of wings

Weaknesses: Vulnerability to the Ice and Thunder Element increases, loses his poison in his claws