RWBY x Ben 10 crossover

The Runaway

As the elevator doors slowly drifted open Ben quickly walked into 'his' office which was crowded by all types of Equipment. Before him was a massive machine with an arm rest and a Ultimatrix shaped hole for whenever Azmuth and Ben will try to unlock any further progress with the Ultimatrix. Besides it was a desk with seven monitors, each showing different pieces of research at the same time, most being about the Ultimatrix but a couple being about this world and how the various regions of the world works. Off to the side there was a sofa next to a coffee and smoothie machine (as per Ben's request) and finally in the corner there was a small rest pod for Azmuth to sleep in. Ben looked around and noticed Azmuth at the computer looking back to Ben curiously, they had no research scheduled for today, so the Galvan felt confused.
"What is it Benjamin?" Azmuth asked as Ben had a wide smile on his face.
"We found another person from our universe, not just Kevin who we have no idea where he is right now." Ben explained quickly as Azmuth spun around his small chair to face Ben.
"Sit down Ben," Azmuth pointed to the Sofa.
"Ironic considering it's my office," Ben joked as he sat down "Anyways apparently Penny Polendina has a teammate who can turn into a Pyronite. Well, it could be something else, but she definitely described one of Heatblast's race." Ben explained.
"A Pyronite you say, hmm I recall Max Tennyson saying there was other Plumbers Kids on your planet who could do a basic version of transforming into one alien similar to your Omnitrix/Ultimatrix." Azmuth spoke up.
"Do you think he is a Plumbers Kid then?" Ben asked as Azmuth nodded.
"It sounds like it, I still haven't heard from the Professor who brought me here so we can summarize it wasn't him." Azmuth theorised.
"This is big either way because if we can find out how he got here then we can maybe use that way to get back home." Ben smiled.
"I suppose we could try it however I doubt it'll be that simple." Azmuth sighed.
"Anyways wanna try the Ultimatrix Scan again?" Ben asked as Azmuth thought for a second.
"Maybe, this new information has given me an idea." Azmuth smirked as Ben placed his arm in the machine and Azmuth locked the device in place.
As Azmuth jumped over to his computer and activated the device four little thin pieces of machinery placed themselves onto the Ultimatrix and the devices face started flashing. "That's new." Ben said as Azmuth smirked.
"I'm specifying my search to try and find a way through the code, specifically by searching for specific species." Azmuth explained as a green light beamed down onto the device from the top and the Omnitrix then spoke.
"Vulpimancer and Polymorph unlocked." The device said as Ben looked awestruck at Azmuth.
"What changed this time, we couldn't find any other aliens after Rath so how?" Ben asked curiously.
"I narrowed my search. These specs of DNA reacted to the DNA I searched, Human DNA- specifically yours." Azmuth said as he leant forward in his seat.
"Why would they react to my DNA? I understand Wildmutt but I never turned into a Polymorph before." Ben said confused.
"That's what I'm wondering too." Azmuth sighed as the two continued testing for a couple hours.

As lunch rolled around Ben found himself in Professor Peach's office with Team CVFY and Penny. The six of them would just talk about different things whilst eating, though Velvet would occasionally offer Ben some food as he only had a lot of Chilli fries and a couple smoothies to eat. "Ben you can't just eat Chilli fries all the time." Velvet tried to reason with Ben as he continued eating his fries.
"Actually Chilli fries are quite healthy for you." Penny spoke up as Velvet face palmed and Ben gave Penny a thumbs up.
"Thank you for understanding me Penny." Ben grinned before continuing to eat his fries.
"So heard from Team RWBY yet Ben?" Coco asked about what they briefly talked about when they met earlier and Ben nodded.
"Yeah they continued arguing immediately after we parted ways apparently." Ben sighed.
"Ah yeah that makes sense then. I'm surprised it took so long considering they put a Schnee and a Faunus on the same team." Coco sighed.
"You know," Professor Peach finally spoke up after being quiet eating some, ironically enough, peaches "Ozpin doesn't think he made any mistakes this year. When we were discussing who made it through in the meeting he said so." Professor Peach smiled.
"Well Team RWBY is resilient; they'll get through this." Velvet said hopefully.
"Yeah I agree Velvet." Ben nodded, being the one closest to the team in the group.
"By the way Miss Polendina, would you please refrain from telling anyone else about Miss Belladonna's heritage? She probably hadn't revealed it for a reason." Professor Peach requested as Penny nodded.
"Of course, anything for a new friend!" Penny grinned.
"So, Penny, what else can you tell me about your teammates?" Ben asked as Penny grinned.
"Well Ceil is very overprotective, and Alan is almost the opposite sometimes." Penny smiled as she continued telling stories about the adventures she and her team went through until the bell rang signalling they had five minutes left of lunch.
"Well lets get to classes, as a heads-up Penny Professor Port's lesson can...drag on a bit." Ben chuckled.
"I'm sure it'll be fine Ben." Penny smiled as the group headed their separate ways, Ben and Penny heading towards Professor Port's class as Team CVFY headed to the combat hall for Glynda's class.

That night Ben found himself walking towards Team RWBY's dorm. Apparently the arguing hadn't stopped since it reignited and what was Ben expecting? Something like this was only going to get worse especially with the added context so as Ben approached the door to hear Ruby and Yang scolding Weiss Ben got concerned at the lack of Blake. He knocked quickly as the door swung open and Yang dragged Ben into the room before locking it behind her. "Sorry I'm so late, where is Blake?" Ben asked as he looked around the room, noticing the lack of the Faunus.
"She just walked out a couple minutes ago," Yang explained as she then moved her head to face Weiss "What do you think she meant by 'us'?" Yang asked as Weiss scoffed.
"It clearly means she cant be trusted." Weiss said without a hint of regret.
"Or it means she was pushed into a corner and forced to reveal her greatest secret as to not betray her morals." Ben spoke up seriously as the trio of girls looked towards him.
"You think she was a part of the White Fang then?" Ruby asked as Ben sighed.
"I barely know about the White Fang apart from what we've been taught in Professor Oobleck's class but if it is the case then what else does that mean, if she was part of the White Fang she would have to be..." Ben left his question open for someone to answer as Team RWY looked down, realising the mistake.
"Oh great, we've been living with a traito-" Weiss went to speak before Ben cut her off.
"I'm going to stop you right there; she may be a Faunus and she might've been part of the White Fang, but she is still your Teammate. You have an obligation to ask her yourself and find the truth for yourselves because you're her teammate. If you don't want to hear her out how are you supposed to know if she is a traitor or if she truly regrets her actions?" Ben asked seriously, giving Weiss a slight glare as the heiress looked down.
"I..."
"I'm apart of the staff team, I'll go and try to find Blake. You guys get some rest and if she isn't back in the morning and neither am I then you girls can go seek out your truth." Ben said without hesitation as he popped open his Ultimatrix and slammed his hand onto the faceplate.
In a flash of green, two large blue wings wrapped around Ben as his skin turned the same colour and his eyes turned into big green bug eyes.
"Big Chill!" He called out before he turned intangible and flew straight out of Team RWBY's dorm room.
"I...I've messed up haven't I?" Weiss asked as Ruby took her team member's hand.
"Even if you have, make up for your mistake when we find her tomorrow." Ruby reassured as Weiss nodded.
"Aww my little sister is truly turning into a brilliant Team Leader." Yang teased.
"Yang!" Ruby groaned as the trio let out a few soft chuckles before heading to bed.

As Big Chill flew around the campus looking for Blake he saw and caught a black strip of fabric that flowed through the wind. The Necrofriggan grabbed the fabric and landed in the courtyard before turning back into Ben "This is Blake's Bow." Ben thought out loud before remembering the aliens he unlocked earlier that day.

Without hesitation Ben slammed his hand onto the face of the Ultimatrix as Ben's body started changing like usual. Orange fur started sprouting all over his body as his eyes slowly shrunk until they were non-existent. Black gills appeared on Ben's neck as his body fell over to being on all fours. The beast wildly growled as drool dripped down Bens's mouth as if he wanted to say "Wildmutt!"
The beast known as Wildmutt took a couple sniffs of the bow as he then grabbed the bow and started following the scent of where Blake was going.

"So, where are we going?" A yellow haired man in an open white shirt with a yellow monkey tail out his back asked.
"Just...away from here." Blake sighed, her bloodshot eyes glimmering at the reflection of the moon as her cat ears twitched from exposure to the winds up at the landing bay of Beacon.
As the two started descending into the town of Vale Blake felt she was being watched. Blake turned her head frantically to see nothing, just an empty street behind her. Blake let out a sigh until she turned her head back around to see an orange mutant dog standing in the middle of the street letting out a low growl with her bow in its hand. "Eek!" Blake gasped as she prepared her weapon in case this monster attacked her.
"What is that thing?" Sun asked, not seeing anything like this before.
"I...don't know, but it's certainly not a Grimm." Blake growled as she waited for the beast to make a move.
The beast was looking towards Blake, then to Sun and then back to Blake before standing on its two hind legs showing a certain badge on its chest which Blake immediately recognised as she eased up but her look of neutrality tattering on distaste remained. "You wont make me go back Ben." Blake warned as the dog started growling, slobber going everywhere as it tried to communicate in an alien language back to Blake.
"You know that thing? Get it to back down then!" Sun exclaimed, still scared of the monster.
"Ben I can't understand you, turn back to normal or an alien that can talk." Blake sighed as Wildmutt hit its Omnitrix badge as a flash of green enveloped the creature and Ben appeared on his hands and knees before getting himself to his feet.
"Sorry, Wildmutt's species is incapable of communication." Ben sighed as Sun's eyes widened.
"He turned into a mutant dog," Sun exclaimed "Now I have seen it all." Sun sighed.
"No, I have weirder, anyways I'm not going to try and stop you Blake, but I am going to make sure you don't get into trouble." Ben said seriously as he approached the two as Blake clenched her weapon.
"Ben this isn't your fight, you should go back to looking after Penny or playing teacher or anything else!" Blake exclaimed tears in her eyes.
"It became my fight when I realised a friend was in pain. I'm sorry I didn't realise sooner but I wont leave you in your time of need." Ben replied.
"You don't get it, you're not even from this world how would you understand the pain of being a Faunus- a freak!"
"I don't, I probably never will learn what it's like being a Faunus...but that's why I have to be there for you, so you don't have to go through it alone." Ben replied quickly.
"...This is Sun." Blake simply said as she continued walking down the street, Sun approaching suspiciously.
"Are you sure you're human?" Sun asked as Ben thought for a second.
"I mean technically yeah?" Ben replied, as far as he knew anyways he was a human.
"Well good enough, Sun Wukong at your service!" Sun smiled as he started walking, Ben walking next to him.
"Ben Tennyson, nice to meet to you." Ben responded as the trio started heading somewhere to rest up and get a coffee.