Birth of the New Ultimate Lifeform of Remnant!

"Think this is it?" A blonde hair boy asked staring at the cave he and his partner just found.

He is a tall teenage boy with dark-blue eyes that are emphasized by his short blond hair messily layered on his head with the right side of his hair nearing his right eye and the left side swept back. He is quite toned, having strong muscles in his arms, shoulders and upper chest. He wears a white diamond-shaped chestplate cut off above his lower abdomen and white spaulders with rerebraces set under them. Underneath the armor, he wears a black short-sleeved hoodie with detached reddish-orange sleeves and a dark brown image of the bunny rabbit Pumpkin Pete trimmed in white with cute black round eyes hidden underneath the chestplate. He also wears blue pants with a white patch on the left knee, as well as black sneakers with "left" and "right" written in black on the respective shoes' soles. He also has elbow guards with cords strung through them and he wears black high tops.

He has two belts crisscrossing his waist, both different shades of brown, with a pair of small pouches on them. Jaune wears brown wrist-length gloves with exposed fingertips and small metal plates over the back. His sword is strapped to his left hip in a sheath that doubles as a collapsible shield.

"I'm not sure, Jaune. Keep your guard up and be prepare for anything." The girl said, who is Jaune's partner.

She is a tall and quite muscular compared to most of the other girls at Beacon, has long hair that is in a waist-length ponytail, curled slightly into a loose ringlet. She has light-green eyeshadow around the far upper corners of her green eyes. She wears a brown over-bust corset with a vertical strip of lighter brown in the center. Additionally, she wears an elastic, black, A-line mini skirt and brown opera-length gloves on both arms. Also, there's a red, ankle-length sash that wrapped around her skirt.

As for accessories, a small circular bronze plate on her right hip opposite two pouches with both connected to a belt. The plate bore her "shield and spear" emblem. Underneath her hair, she wears a brown circlet adorned with a pair of small, green, teardrop-shaped emeralds on thin chains. She also sports a large bronze gorget around her neck and a bronze bracelet on the upper half of her left arm. She armor is elaborate bronze greaves that started below her mid-thigh before continuing downwards into her boots, as well as a pair of cuisses that began mid-thigh and ended slightly above her knees. She is also equipped with a bronze bracer capable of connecting with Akoúo̱ atop the sleeve on her left arm. Her high-heeled boots are brown with bronze trim, matching her skirt and sleeves and reaching up to mid-calf. Breasts sizes: G-cup.

"Hang on, Pyrrha, let me see if I can make a touch." Jaune said, looking around until he found a strong-looking stick and two rocks. He rubs the two rocks together to create some small fire sparks onto the stick until it burns thus a touch was made.

"Impressive, did you learn that yourself?" Pyrrha asked.

"Yeah, during a camping trip my family and I always to go though it can be a little too exciting when it comes to having seven sisters." Jaune mentioned which Pyrrha became shock.

"Seven? So, you're the only son?" Pyrrha asked, wondering how a single boy could live in a family like that.

"Oh, it isn't so bad, sometimes they give me some space and do some of the things I want to do, and not style my hair." Jaune said, glad that he didn't let give him a cut before coming here to Beacon.

"It must be nice to have a big family, I'm an only child and never got know what having a sibling is like." Pyrrha confessed.

"I envy you, let explore this cave for a bit and if we don't find anything, we'll look elsewhere." Jaune suggested, thinking of possibility that the relics isn't in this cave.

"Just remember to encage your aura, just in case of danger." Pyrrha said, remind the Arc boy that his aura can help protect him from damage.

Once the two are inside the cave, it's completely dark and would've been lost and not find each other, good thing Jaune made the touch beforehand. So far, there's nothing special going on in the cave but rocky walls and ceiling and a tunnel that could go on for miles, like Pyrrha said Jaune prepare himself for the worst.

"Think we should leave now, I'm getting a bad feeling about this." Jaune feared that something may happen at any moment.

"Well, this cave doesn't appear to be the temple we're looking for, so I guess we can go." Pyrrha second Jaune's thoughts on leaving.

Just as they turn around heading back to where they came in, Jaune's body started to glow red brightly, Jaune gasp and confused of what's happening to him.

"Huh, Pyrrha…?" Jaune freaked out, Pyrrha notice the glow and turn seeing almost like human lightbulb.

"Jaune, what are you doing?" Pyrrha asked.

"I don't know, my aura is acting on its own for some reason… and it's telling that there's in this cave." Jaune said, not sure why as he looks back at the deep tunnel.

"There's something here that's making your aura react like this?" Pyrrha wondered, what could possibly make person's aura react like this.

Jaune didn't respond as he saw something glimmering deep in the cave, something red and shiny, like something is calling out to him and he couldn't ignore it, it's like something was telling him to go to that tiny light.

"Go wait for me outside, I'll be back." Jaune said to Pyrrha before walking off, but he felt his hand being pulled by Pyrrha looking at her with a serious look.

"Jaune, we're partners; that means wherever you go, I go too." Pyrrha smiled with determination.

Jaune couldn't help but chuckle, thinking he must be one lucky guy to have met a kind and strong person like her like it was destiny that brought them together. Jaune nodded before continuing onward into the cave to find whatever mysterious object is that's somehow calling the young Arc and hope it isn't anything dangerous.

The deeper they went in, the closer and brighter the shiny object is to them. Thankful, Jaune's red aura became their new source of light, so they didn't need the touch anymore. After a few dozen more step, they reach the object they seek: a shiny red emerald laying in the middle of the ground like it has been waiting someone to pick it up. Jaune feels his aura getting stronger the closer he is to that emerald.

"Pyrrha, I think this is it." Jaune said as he carefully makes his way to the emerald.

"Be careful, we don't know if there are any Grimm in here." Pyrrha warned looking around guarding Jaune's back while he gets that strange jewel.

Jaune slowly makes his way and stand on one knee close to the emerald, reaching out his hand and grabs it in his hand, then suddenly the emerald started glowing brighter as the ground they stand on shake.

"An earthquake…? Jaune?" Pyrrha called out but got engulf by the bright light.

(Jaune's Mindscape)

"What happened, where am I? Pyrrha?" Jaune called out, but no answer. Finding himself to be in a white void.

"So, you're my new successor, huh?" A deep-edgy voice asked from behind.

Jaune gasp as he quickly turns around to find a short black creature standing near him, at first, he thought it was a Grimm but upon closer inspection that doesn't seem to be the case.

It seems to more of a small, black anthro hedgehog with red stripes on his quills, around the edges of his eyes and on his arms and legs. He has red eyes, a patch of white fur on his chest, and his muzzle is tan. He has six quills on his head, four of which curve upwards, and two that curve downwards, has two spines on his back and a small tail. He wears white gloves with black cuffs and red tongues, and matching shoes. On each of his wrists and ankles he wears a single gold ring.

"Hmm, you're not much, but I guess you're special if my soul is yours then who am I to complain." The black hedgehog said confusing Jaune.

"Wait, my soul… and yours… what…?" Jaune asked like his brain is hurting from all this confusion.

"Look kid, all I can say that at some point in the past I died and now found my soul merged with yours for some reason, meaning you and I are now one." The black hedgehog revealed shocking Jaune as he looks pale like a lifeless body and became speechless.

"Shocking, I know, only begun to notice when that red hair girl unlocked your aura like I had just awoken up from a long sleep. And the Chaos Emerald told me that you would be my successor." Shadow explained.

"…Chaos Emerald, what's that?" Jaune asked. Shadow signs that the boy haven't figured it out yet.

"Chaos Emerald are powerful jewels that can transform your thoughts into power, meaning even with one you can do pretty much anything even bend reality to your will. There are seven of these emeralds and you hold one of them." Shadow detailed about the emeralds and mentioned about the one he found.

"Wait, the jewel I found was a Chaos Emerald?" Jaune asked gasp, he would've never thought to find a powerful object.

"Yep, and it seem to have responded probably due to me and now have inherited my powers too." Shadow mentioned.

"Your power, what power?" Jaune asked.

Sheesh, it feels like a game of twenty questions.

"My power is Chaos: a never-ending pool of unstable yet powerful energy that you can use them in many different like a barrier, empower yourself, or unleash a powerful that level a whole city. And with each Chaos Emeralds, you can become more than before." Shadow explained.

"This is… too much to handle at once." Jaune said.

"Don't worry kid, just take it slow and you'll be able to handle the power of the Ultimate Lifeform!" Shadow believed, giving the Arc boy some confidence.

"Really?" Jaune asked, even his family doesn't believe he could be a great Huntsmen.

"I can already tell you got the potential in you, to become something greater than the world has ever seen." Shadow smirked.

Jaune did some thinking about everything that has just happened; he found a strange item which happens to be a powerful artifact and there are seven of them, finding himself talking to a small humanoid hedgehog with his soul merged with his, and now he finds out that he's now the new 'Ultimate Lifeform' and gained his powers. Maybe all this isn't so bad, he wants to become a great Huntsman to help save lives and destroy the creatures of Grimm that has been threatening Remnant, and maybe help bring world peace for both humans and Faunus.

"Oh, and I would decide right away, because I can sense your partner in trouble against a giant scorpion." Shadow mentioned.

"What?" Jaune gasped, almost forgotten about Pyrrha.

"Don't worry, she's fine for now, but I think you better go help and her the power of the Ultimate Lifeform!" Shadow suggested encouraging Jaune to try out his new power.

"But how do I control this power?" Jaune asked, hoping that he doesn't go overboard.

"You'll know." That all Shadow said before he snaps his fingers and two gold rings appear on Jaune's wrists and everything went white.

(Back in Reality)

Jaune suddenly shot himself up after waking from what he believes to be a dream but notice the golden rings on his wrists the same ones that Shadow gave him instantly knowing it wasn't a dream. It was real, and Shadow has entrusted his will to him. He also has some changes; like having his eyes are no longer blue but red now and has a single sharp stripe on his hair.

He got up on his feet noticing he seems to be the only one in the cave which means that Pyrrha is outside dealing with the giant scorpion, otherwise known as a Deathstalker, fighting the monster all by herself.

Well, not for long as Jaune eyes glows and feel the strength in his legs then running towards the exit of the cave in burst of blinding speed with a red blur trail behind.

(Music-I Am… All of Me: Crush 40, Shadow the Hedgehog Music)

Outside the cave, Pyrrha was push back with her shield being throw away and force to fall on her butt to the ground by the Deathstalker as it approaches her with the attend to kill the human girl with its own claws and eat her flesh. Pyrrha brace herself for the worse as the stinger of it's tail raises up and swings down until Jaune came out just in time to save Pyrrha before the stinger was inches to her, making it impale the ground instead.

Pyrrha notice that the Grimm has kill her now, looking up to see Jaune who seems to have saved from death and carrying her in a bride style which makes her feel embarrassing.

"Jaune…?" Pyrrha shocked, she's not sure why, but she gets the feeling that Jaune is different now.

"Don't worry, I'll handle this." Jaune declared to kill the Grimm himself. He gentle put Pyrrha down and turn his sight the Deathstalker as it just free its stinger.

The scorpion Grimm turn its attention to Jaune who had just showed up, though it didn't care there are more human it'll kill him all the same. It charges at Jaune as he prepares to perform a trick he just learned thanks to Shadow.

First, he runs up to the Deathstalker with his super speed and starts ramming it with punches and kicks in all directions before the creatures could even react, even with it's armor it can still feel the strike of the attacks.

Jaune decides to kick this up a notch and starts forming into a red aura ball spinning faster and faster, aiming himself at the clawed-monster.

"Spin Dash Attack" Jaune burst at the Deathstalker, striking it on the face and force it to bend backwards revealing its underbelly which is its weak spot.

Jaune stop spinning in midair and hold out his hand to the side as sharp dagger-shaped energy spears appears.

"Chaos Spears" Jaune fire the spears at the Deathstalker which impale its belly and exploded instantly upon impact. Killing the Grimm once and for all.

Pyrrha just sat where Jaune set her down and shock with her eyes widen seeing displaying this new kind of power. It almost like he's a completely different person than he was when she first met him in the locker room and couldn't help but blushes at the sight of Jaune being awesome while fighting that Deathstalker, also notice that he has gotten slightly muscular than before.

"Hey, Pyrrha, you okay?" Jaune asked concern for his partner's wellbeing. Pyrrha quickly snap out of her shock thoughts.

"Oh, yes, I'm fine, thank you for saving me." Pyrrha thanked.

"You're welcome, now let get going and find that temple!" Jaune said as he helps Pyrrha up on her feet and they stare into each other's eyes for a moment.

Jaune Arc still doesn't know for sure if he can live up to become strong like Shadow and earning his title, but he's going to try and do his best for himself, his love ones, and all of Remnant.

KO a new story is born and hope you all enjoy it!

It's a crossover of RWBY and Sonic where Jaune Arc has become the new Ultimate Lifeform after regaining this power and title from Shadow himself as well as finding a certain powerful jewel in which he will later find the other six. Also forming his harem along the way with the girls of my choosing, but you can also comment on your opinion too.

I got this idea from some stories about Jaune gaining the power of souls of anime strong characters, like with Goku from Dragon Ball, Ulquiorra from bleach, the three Devil Hunters from Devil May Cry, and Anakin from Star Wars. They were all awesome I decided to do one of my own.

KO comment, favorite, and follow through of how this new story will go!