RWBY x Ben 10 crossover

The Vytal Tournament begins

The loud roaring of the crowd...the stadium lights piercing down towards the exit we were walking to...the four steps of footsteps walking towards the arena they would fight for the honour of their schools...and the honour of my girlfriend...

The moment we walked onto the cold steel of the floor we looked over towards the enemy team. a team of a Dinosaur Faunus with a chainsaw, a tanned woman with a dust powered shield, A guy with two scimitars and finally a long green haired woman with a pistol stood across the field from us as we slowly made our way onto the platform that stayed consistent in the festival. "You're going down." The tanned woman scoffed as she started doing some stretches.
"If anyone is going down, it'll be you." Said my teammate Alan, who was just wearing a white tank top and blue jeans, as I could feel the heat rise next to me.
"Not yet." Ciel scolded as she swatted Alan's head and the temperature went back to normal.
"Maybe you should've considered working on teamwork before entering the tournament." The guy with two swords smirked.
"Oh, it's my turn to trash talk! Maybe you should've worked on your outfit before entering the tournament." Penny smiled as she looked over to the crowd where Team CVFY were sitting before giving Coco a thumbs up.
"Maybe the lessons on trash talking weren't a good idea." I sighed as I looked where Penny was giving a thumbs up to and my eyes met with my beautiful girlfriend's gaze.
"Oi, you're the one who fought the Grimm in Vale a few weeks ago right?" I hear a gruff voice ask as I look over to the team leader who tied a green headband around his forehead under his spikey hair.
"Yeah, What's it to you?" I asked as the man let out a chuckle.
"Just this is the first time I can fight someone like me...you better not hold back." The Team Leader smirked as I looked back to Velvet who was saying something.
I couldn't hear it due to the distance, but I knew what Velvet was saying...Kick their butts.
"Alright, it's time for the next match in the preliminaries! Team SHRO from Vacuo shall be fighting team PACE from Atlas- though it is worth it to note Elm can't make it so replacing her is our very own Ben Tennyson from Beacon." The announcer, Professor Port called as the crowd erupted into another wave of cheers coming from all directions and a light shone from one of the panels on the floor as the different panels started withdrawing.
"It seems this fight shall be happening in the city environment!" Professor Oobleck, the second announcer, roared out in excitement as all around us a city like environment rose from the ground as we left to get to our side of the field.

"Alright guys, let's do this!" Penny smiled as me and Alan thrust our fists into the air in support...whilst Ciel just stood there idly.
"3...2...1...Match start!" Suddenly the starting claxon sounded and Alan's body was suddenly covered in molten rock with flames erupting from his head as he turned into his hybrid Pyronite form.
"Remember what I showed you Alan!" I called out as Alan nodded, a stream of fire leaving his palms as he carved out some molten rock under him and flew away whilst surfing on the rock.
"I told him not to do that in front of Penny, he will never hear the end of this." Ciel groaned as she ran into the city through a few alleyways leaving Penny to chuckle.
"They're such good friends." Penny grinned as I awkwardly watched the two depart.
"I don't think I would call that friendship." I chuckled as I looked down the main road in front of us as the man with the two swords as well as the team captain, Shiro, was running straight at us.
"So, what alien are you going to use?" Penny asked, tilting her head as she smiled innocently at me whilst I flipped through my aliens.
"I think we need some power...like humungosaur!" I grinned as I slammed down my watch on Humungosaur's hologram.

Quickly I felt my body start to morph, however instead of feeling my body grow like I would with Humungosaur I started to shrink as internally I felt my bones compress and thin out whilst my face elongated and my nose vanished. "Echo Echo!" I cried out as I face palmed.
"Of. Course. It. Would. Bug. Out. Now." I sighed as I looked up and a wide psychotic like grin formed on the Faunus' face.
"That's it...That's what I want to fight!" Shiro roared as the green scales around his neck started to envelop his body as his body began to shift, a lot like how my body does.
As the Team Leader of the enemy team grew in size, slowly becoming a full Tyrannosaurus Rex, his teammate charged sideways in a direct line from Penny in a way that he would stay out of the way of Shiro. My eyes widened as the transformation completed and a massive dinosaur was heading straight for me. "Why. Couldn't. I. Have. Got. Humungosaur?" I asked in panic.

In the stalls where Team CVFY was sitting watching the match, their eyes all widened as Shiro turned into his full T-Rex form. "What is Ben doing? Echo Echo doesn't stand a chance!" Coco groaned as she clenched her fists, she didn't want Ben to lose like this- she wanted to be the one to kick his ass in this tournament!
"Woah, is that a dinosaur?" An excited Ruby Rose grinned as Team RWBY and JNPR sat behind Team CVFY in free seats as Yatsuhashi nodded.
"Yes, and it seems like he is heading straight for Ben." Yatsuhashi said as he looked over to Velvet who had a calm look on her face.
"Ben's got this, he always wins." Velvet smiled as her eyes never left Ben and a small blush was on her face.
"Yeah, Ben wouldn't lose like this." Weiss chimed in as she relaxed in her seat.

As fast as I could I formed two more Echo Echo's and threw us up to the top of one of the city buildings that sprouted up from the ground. As I felt my pairs of feet land on the building the structure began to shake as Shiro rammed straight into it. Feeling the building start to topple I ran to the other side of the building and hopped to the next one and the one after that, knowing Shiro would charge head on to get to me. As some distance grew between us, I ducked between two buildings to the side in order to shake him off as a wall of Echo Echo's waited for Shiro to crash into the building which he promptly did as I shouted "Wall. Of. Sound!" and a sonic blast erupted from my mouth, hitting the dinosaur on the side as he was sent back a few feat.
As the dinosaur recovered he slowly turned to me before letting out a mighty roar, showing the pure strength of the Apex Dinosaur. "That was a good hit...but if that is all you have, then this match is over." Shiro growled as various clones of Echo Echo all morphed into one.
"This. Isn't. Close. To. My. Max." I said slowly as I twisted my chest badge ninety degrees and my body started to grow.

Within a flash of green a hard set of scales, so close together that it looked like a hard blue armour, grew on my body. Various holes formed on my body, disks growing around the hole as I grew to around 6'8.

Standing there proud in my blue metal skin the T-Rex looked down to me with a smirk on his long scaley face. As the T-Rex revved his chainsaw I immediately let out a soundwave from my feet that was so high pitched no one could hear it, sending me flying above the dinosaur who looked up to me and got in a position ready to jump at me. As the dino leaped into the air I quickly swooped under him and delivered a gut punch, reverting to my previous position as Shiro landed back on the floor. "You're good...but if that's all you got, I win." Shiro roared.
"No, it's not all I have...I'm just getting used to this form." I responded as I reached up and grabbed a disk from one of my shoulders, tossing it in the air as I examined it.
"Good, you better go all out then!" Shiro smirked as he jumped back up at me, however instead of sweeping under him I flew higher in the air before the disk left my hand and sent out a wave of sound which knocked him back down to the floor.
"I won't waste any time then," I calmly responded as the disk proceeded to clone itself several times as it hovered above the recovering T-Rex Faunus "Sonic Doom!" I shouted as each disk sent a wave of sound down at the prehistoric beast, knocking the dinosaur back into his human form and the realm of sleep as he was knocked out.
"Shiro Asada has been knocked out at the exact same time as Ethan Kanne, that's two members left for Team SHRO!" Oobleck called as suddenly the crowd all groaned.
"Don't count Team SHRO out yet though, Ciel Soliel has been knocked out by Heather Kurusu." Professor Port followed up as instinctively I flew over to where Ciel had been heading to see Heather picking up Ciel softly.
As the Tanned woman looked up to me she motioned for me to come down to the ground, before placing Ciel down. "I know I don't have a chance against you, Shiro was our best bet." Heather sighed as she backed up a few steps for me to pick up Ciel who had bruised slightly from the beatdown.
"Thank you." I simply said as I picked up Ciel and flew her over to the recovery point, where a member of staff took her carefully and I flew back to Heather who hadn't moved a step.
"Did you go all out on Shiro?" Heather asked as I nodded.
"Yes. He was a powerful foe." I said as a soft smile grew on heathers face.
"Good, he got what he wanted then...I forfeit." Heather smiled as she headed off the stage and I watched her leave, Shiro had a good team behind him...I wonder what my team would've been if I had been accepted.
"Heather Kurusu has forfeited, it's now up to young Opal Jack to finish the fight for her team." Professor Port called out as the crowd erupted in cheers once again whilst the battle ensued...