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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Amphitheater

Students began piling in as they found their friends and began taking their seats, some are wondering why are they being summoned early.

Team RWBY, led by Ruby Rose, are greeted by their fellow friends, Team JNPR. "Morning guys!" Ruby said, cheerfully as always. "Morning Ruby." Pyrrha greets the young huntress.

"Anyone know why Headmaster Opzin summoned us here on a Saturday morning?" Yang asks with her hand on her hips. "Beats me." Jaune shrugs.

Just then the hologram on the stage lits up and Ozpin's face appeared on the projection. "Shhh! Professor is about to speak." Weiss shushed them.

"Good morning, my students. "Ozpin started. "I know it is early, but I would've not called you here if it isn't important." They began to listen as silence filled the room. "With that being said, today we'll have the opportunity to see two new individuals attempting to perform an initiation like the rest of you; they'll be heading towards the temple and grab a single relic whilst fighting Grimm along the way. The only difference is that they will be doing this to become students, but rather something else."

Everyone began whispering at that. Yang looks at Ruby, who shrugs nonchalantly.

"For those who wants to watch these two complete their task, you may free to stay. For those don't, you can leave. Dismissed." Ozpin said as the hologram disappeared and the images of Jack and Emma standing on near the cliff appears.

Some students began to exit as they wanted to eat something in the cafeteria, while the remaining decide to watch.

"I'm curious what purpose they have for being here if they're not going students like us." Weiss said. "Professor Ozpin must have something special for them."

"Same here." RBY and JNPR said in sync.

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"Are you two ready to start?" Glynda said, looking at Jack and Emma.

"Ready as I'll ever be." Jack said, tapping the MonTrix. Last night, he activated the Master Control and therefore he turn into any form he wants again without tapping the MonTrix.

"Yes Ms. Goodwitch." Emma salutes.

"Now step on the platforms." They both step on the gray metal square in front of them as they ready themselves. "Your initiation begins in five..... four..... three..... two..... one..... begin."

Jack and Emma are sent flying into the air, screaming with the latter in joy and former in shock. Glynda then looks back to Ozpin who just arrives there with his mug as usual. "Have faith Glynda. I believe they will do just fine."

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"Wooooohoooooo!" Emma screams in joy as she and Jack are falling towards the trees. "This is the best day of my life!"

"Not for me! I haven't been this high!" Jack yells as he flails his arms.

"Aw, don't be a baby Jacky!" Emma sticks her tongue, causing his eyebrow to twitch.

"Oh yeah," Jack challenged. "We'll see who's the baby when I get there first!" He is then engulfed by a light blue light as he transforms.

When the light subsides, Jack is now a silver-eyed dragon with silver and light blues scales. He has wings that are fused to the point it is trident-like with a spear-like tip on one end at the front and three at the back. Spikes are also on his head, arms, legs, back and tail. His wings also have three holes in each which have red energy flowing out. He has blue eyes and a crest on his head. The MonTrix symbol is placed on his chest.

"VALSTRAX!" The Sky Comet Elder Dragon screeches as his wings charges with the Dragon Element and suddenly flies ahead of Emma with an echoing boom of his wings. "See ya, wouldn't wanna be ya!" He taunts.

"Hey!" Emma cried out. "No fair! You had a head start!" She turns into Omnivoracious and went Ultimate Omnivoracious as she flies after Valstrax.

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The students watching them suddenly did a spit take as they saw.

"Did you guys see that?!" Jaune said, making he isn't the only one.

"We sure did Vomit Boy." Yang confirms.

"I wonder how many forms they would have?" Blake said.

"Ooh! Ooh! Maybe they have a form that could break legs?!" Nora said, jumping.

"Or make cookies!" Ruby said, joining Nora's actions.

Their teams and the students sweatdrop at that.

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"Made it!" Valstrax said, landing on the ground with the temple just 9 miles away.

"No fair," Ultimate Omnivoracious said, landing next to him as she turns back as Emma. "You got a head start and rocket boosters for wings!" She pouts.

Valstrax looks at her and smirks. "Hey, we never made a deal about not using speedsters." He said as he turns back as Jack. Emma huffs as she crosses her arms and looks away.

"Can we just take the relic and be done with it?" She asks. Jack shrugs. "Sure." He replies.

Just then several growls and hisses caught their attention as they halt their advance and got back-to-back. Soon, they are surrounded by Grimm, ranging from Beowolves, Boarbatusks, Creeps to several Ursas and Beringels and a single Death Stalker.

"Are you thinking wat I'm thinking, Jacky?" Emma asks Jack.

"do you have to ask to ask?" Jack smirks, making Emma smirks as well as light blue and crimson red light consumes them.

Jack turns into wyvern with dark green scales and platings. His spikes are colored lime green with a earwig-like pincer at the tip of its tail. He had green eyes with four horns connected on his forehead and has wings resembling those of insects. And he had the MonTrix symbol on his chest.

"ASTALOS!" The Electric Wyvern screeches as his body produces electricity and makes a very loud cricket sounds.

Meanwhile, Emma turns into Buglizard before she undergoes Ultimate Evolution. She gains an extra pair of legs with the back legs gaining two red spikes behind them and the four front legs gain a single red spike on their ankles her back spikes fused as they grew out to become more larger and sharper then ever. And her throat as now a red sac-like pouch. Her face also gains spikes and her tail has a sharp stinger. The Nemetrix symbol remains on her collar wrapped around her neck.

"ULTIMATE BUGLIZARD!" Ultimate Buglizard roars out.

After a few seconds, the Grimm began to attack, but Astalos and Ultimate Buglizard are more than ready. Ultimate Buglizard takes a deep breath before she releases red clouds from her mouth that several Creeps and Beringels made contact with. The Grimm suddenly roars in pain as their body begins to dissolve by the acidic cloud before ultimately dying.

Astalos fires green electricity from his head as struck multiple Beowolves. Two Ursas manages to sneak up on him and starts clawing at his wings. Unfortunately for them, Astalos' wings are tougher than they look before he swipes his tail without looking and cuts them in half. The Death Stalker screeches as it crawls it way towards Astalos and raises hit stinger to pierce him.

"Oh no you don't!" Ultimate Buglizard said as she tackles the Death Stalker and jumps away just as Astalos turns and whips an electric ball from his tail that struck and causes it to screech in pain before Ultimate Buglizard release eve more red acid clouds that causes it to die as it dissolves.

"Man these thing just keep coming!" Ultimate Buglizard whines as she jumps from an attacking Beringel before using her two legs to punch it away.

"I know right?!" Astalos as said he flies above them and fires more electric attacks from his wings and tail. "I'd say we go all out on this!" He said as he transforms.

He is now a 15 foot tall gorilla-like beast with long horns pointed sideways and broader muscles with red eyes. He has the MonTrix symbol placed on his left arm.

"RAJANG!" He roars in pure rage ad he fires a thunder ball from his mouth that decimated five Ursas before undergoing Ultimate Evolution. His black fur turns cyan blue with his eyes doing the same as his arms seem to lessen in mass. "ULTIMATE RAJANG!" (1)

"Now you're talking!" Ultimate Buglizard said as she turns into Tyrannopede. The natural predator of Humungousaur roars as she tramples any Grimm dumb enough to get in her way.

"RAJANG SMASH STUPID GRIMM!" The Gold Lion roars as he swings his massive arms sideways to bash Beowolves, Beringels, Creep and even Ursas away as he fires a powerful thunder beam.

5 minutes later.....

Ultimate Rajang huffs as he and Tyrannopede stood as the lone victors with dissolving Grimm around them. "That takes care of that." Tyrannopede comments as she turns back to Emma.

"Grimm many, but Ultimate Rajang is the strongest there is!" Ultimate Rajang grunts as he turns back to his human form. With that they continued walking towards the temple until they reached the top.

"So this is it?" Emma said, unimpressed as she picks up a white horse.

Jack shrugs. "To be fair, the people here never face aliens and Monsters in our world compared to theirs. So we should- LOOK OUT!" He yells as she tackles Emma to the ground before missiles destroys the temple and the two are sent tumbling down.

"Oh." Emma groans as she sat straight up and sees Jack getting into a fighting position. "Jack?" She asks.

"I know you're out there!" He shouts. "Come out and face me Albedo!"

"I'm impressed Jack Andros." An all too familiar voice said sarcastically, causing Jack to narrow his eyes in anger and shock. Then, Ultimate Humungousaur came into view with his hands morphed into missile hands. "You still manage to know me." He said as he turns back into Albedo.

"Wait, how did you became a kid?" Jack said, confused. "You can thank Azmuth for that." Albedo growls before turning into Ultimate Arctiguana and fires two powerful ice beams from his cannons.

"JACK!" Emma screams as she pushes Jack out of the way before the beams struck her and she is encased by ice.

"EMMA!" Jack yells in horror, seeing his friend's frozen state.

Ultimate Arctiguana laughs tauntingly. "Aw, it seems she's chosen to save your life over hers. Reminds you of the old days with your family, huh Andros?" He mocks.

Jack turns towards the Evolved Polar Manzardill in fury with fire raging in his eyes. "Now you've done it motherfu****!" He roars in fury as he transforms.

Jack became a blue-eyed, lion-like dragon with purple skin and red mane and fire with a dragon's tail and wings. He has horns on his head and has the MonTrix symbol on his chest.

"I'm not done yet!" Teostra growls angrily as he undergoes Ultimate Evolution. He suddenly gains a goat-like head and face on his right side while his tail morphs into a snake. His red fur is now mixed with blue.

"ULTIMATE TEOSTRA!" Ultimate Teostra roars with all three heads. After he stops roaring, he glared down at Ultimate Arctiguana. "Get ready for the beating of your life!"

"I'd like to you see try and fail." Ultimate Arctiguana sneers as he turns into Ultimate Swampfire. He is similar Ben used before, except all blue are replaced by red. "Not after Ultimate Swampfire burns your ass!" He said.

"You're on!" Ultimate Teostra roars as he flies towards Ultimate Swampfire, as he began sprinting towards the Elder Dragon to do battle.

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Alien Data

Ultimate Buglizard

Species: Unknown. The predatory species of the Lepidopterrans

Abilities: Can now release red acid, has an extra pair of legs, sharp spikes from legs and back, stinger tail

Weaknesses: Vulnerability to electricity increases

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Monster Data

Ultimate Rajang

Species: Evolved Fanged Beast

Abilities: Possesses blue fur when angered than yellow, yellow thunder becomes cyan blue instead, power over thunder increases

Weaknesses: Vulnerability to the Ice Element increases

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Monster Data

Ultimate Teostra

Species: Evolved Elder Dragon

Abilities: Chimera-like body, can release blue flames from three heads, fire aura can reach even longer distances

Weaknesses: Vulnerability to the Ice, Water and Dragon Element increases, igniting the fire auras speed decreases

1. Yes, I based Rajang's ultimate form from Super Saiyan Blue from Dragon Ball Super.