Disclaimer: I do not own My Hero Academia. I do, however own my OCs. I also do not own any aliens, Ben 10, or 5YL. Those belong to Man of Action and The Ink Tank respectively. Danny Phantom is owned by Butch Hartman.

Review:

Blazing Fire Star Kid 01 :I've set up what will probably be a depressing chapter/arc for our main OP boi. Maybe.

'Thoughts'

"Speaking"

"Mental Speech"

"Buff Might Speaking"

'Buff Might Thinking'

"Attack Names!"

The Chaotic Conclusion!

Reo held Momo's slowly freezing body in his arms, crying as he desperately attempted to reverse the effects of what he had just done.

He just killed the woman he loved, and there's nothing he could do to bring her back.

"I'm sorry…",cried Reo, holding Momo close to his chest,"I'm sorry, I'm so sorry…."

Shuffling was heard as Reo cried silently, before an arrogant, cocky voice chuckled,"My nanites finally got back online, no thanks to you…"

He saw Reo holding someone, and unable to tell who it was, he simply laughed once more,"I can't believe it! You killed an innocent person instead of the one person you wanted to kill! You're pathetic, Monroe! You can't even protect one person!"

Reo growled softly as he heard Neito's mocks, before his hair immediately turned into black flames, covering both him and Momo in a dome of flames, which then became a glowing dome made of the unknown energy, which was now black and blue.

Reo then turned his left hand into a blade, and making sure Momo was alright, chopped his left hand off. He then stood, before turning his head and glaring at the still laughing Neito, he began walking to him, before he felt Momo's hand around his wrist.

"Don't do this, Reo…",coughed Momo,"Please…"

Monama laughed as he saw who was speaking,"Oh, shit! You really are useless! You couldn't protect your own girlfriend when both of your lives literally depended on it! It's hilarious, really! First Paradox kills your dad, then your mom dies due to her own damn quirk, and now your girlfriend is dying as we speak!"

Something in Reo snapped at that moment.

He subconsciously phased his arm out of Momo's grip as he walked through the dome, realizing something in that moment.

He'd never done anything wrong…he wasn't the one who killed his father, that was Paradox. He didn't kill his mother, she died in the most natural way a ghost could.

He'd never hurt her…he'd never hurt Momo…he wasn't the one who killed her, that was all Neito…everything that had happened…was Neito's fault.

The laughter soon stopped as Neito looked at Reo's slowly approaching form, realizing that he has royally fucked up this time. He didn't know what was about to happen in the next few minutes, but he most likely wasn't walking away from this.

Reo walked towards Neito as his skin became metal once more, but this time, the metal was a midnight blue instead of gray. Horns sprouted from Reo's forehead, with his hands and feet turning into the animalistic claws from the training camp, as well as the rest of his body.

However, unlike at the training camp, Reo hadn't gone berserk. He simply floated into the air as storm clouds formed above him, with lightning striking as well. Neito attempted to run, but was stopped by a wall of blue and black flames.

"This has been long overdue for you, Neito.",Reo said darkly,"It's time for you to die!"

Allowing the darkness to cover his severed arm, Reo made a giant, flame covered mace before swinging it, with Neito doing his best to dodge.

However, Reo planned for that. The second Neito moved out of the way, he was struck by lightning, before actually getting hit by the mace. He was blasted away, with the flames covering him as he crashed into a wall of rubble.

"I've got to get out of here…",groaned Neito as he opened a portal, only to be met with a punch to his face.

"Do you honestly think you'll be going anywhere?",laughed Reo, before splitting into two of himself and looking at his duplicate,"Go take care of All for One. He's still alive, so just take him to Tartarus for me."

The duplicate nodded before turning into electricity and disappearing, with Neito growling as he attempted to get there first.

Reo simply grabbed him by his head and smiled,"We still have some unfinished business, asshole. Do you have any last words, Copycat?"

Neito smirked,"Everyone in the villian underworld will know where your loved ones live, hero or not. Have fun watching them die."

Reo sank his now fire-imbued claws into Neito,"I'll handle them myself then."

Slamming his head onto the concrete, Reo continued breaking Neito piece by piece, before his maniacal laughter returned. He soon pulled Neito back up, smiling as he saw the nanites starting to heal him.

"I can't kill you if those things are healing you.",chuckled Reo, before slamming his fist into Neito's stomach, while sending out a wave of Speed Force and One for All imbued electricity combined with the unknown energy he continued using.

Neito, somehow was able to speak,"Heh…wonder what your parents…would think about you now? A weak father…a dead mother who couldn't raise her own son…and a patheticly weak girlfriend,you've got nothing…and no one…you're just like me.."

That was it.

Reo snapped as all sense he had turned to rage, before the full fury of his mind and form caught up to him once more.

His teeth became sharper, with his tounge becoming snake like once again as he held his head in pain before looking at Neito, who had been pinned by one of Reo's feet, with the enraged ghost looking at him while a maddening combination of a grin and growl was heard.

Reo's darkness arm was now imbued with magma and electricity, with his other arm being covered with Vibranium imbued Taydenite, with veins of ice that ran down his arm.

"What's wrong?!",yelled Reo,"You wanted me to be just like you!"

Reo slammed both fists into Neito's stomach, with the android coughing up blood as he felt nothing but pain.

Reo laughed as he tore away parts of Neito again and again, enjoying nothing more in this moment.

Unknown

"Every hero available, we need you to get to Kamino, now!",shouted the head of the Hero Public Safety Commision,"We need to take that kid down hard and fast!"

Every hero on comms heard the order, and despite not liking fighting a child, they couldn't go against what they were told.

The head of the HPSC didn't quite care if the villains were taken down, but he did care about a child who was going to U.A., especially if that child was about to commit murder, regardless if it was a villain or not. The HPSC still had a reputation to uphold, and they couldn't have Reo tearing that apart.

"Sir, all heroes are busy with Nomus or helping civilians!",said the head of communications,"No one will make it in time to stop him!"

The chairwoman growled,"Let's send him in then, asssuming he's not already there. In case he can't do anything, get Nagant and Hawks on standby."

The woman looked at the screen as she sighed,"And god help us all."

Reo continued slamming his claws into Copycat's mangled body, tearing him apart piece by piece while laughing maniacally as the nanites attempted to heal him, only to be too slow due to the fact that they were being overloaded by Reo's natural electricity, as well as the combination of One for All, the Speed Force, and the strange energy he kept using.

"Please…",begged Neito, having had enough, especially since his right arm and left leg were ripped off for the fourth time,"Let me die already…I'm sorry…"

Reo either didn't hear his begging, or he outright didn't care. He simply responded by covering his hands in blue and white flames, burning Neito as he yelled in pain and agony.

Neito groaned as he used as much energy he had left to activate the self destruct feature in his nanites, which was strong enough to resemble four active nukes.

The explosion soon began to engulf everything around it, before it started to collapse in on itself, with Reo having been at the center of it while absorbing the blast and returning it back to Neito in a full, single attack to the face.

"AGHHH!!!!",shouted Neito, yelling in pain while he crawled away, only to be grabbed by his face and have Taydenite shards be stabbed into his eyes.

Reo simply laughed before he stood up and walked away, before returning to his normal ghost form and flying towards Momo.

He ultimately stopped his flight the moment he reached his girlfriend, before once again, slowly changing again as he saw who was with Momo.

"Paradox…",growled Reo, using every bit of speed he had to get to Momo,"Get the hell away from her!"

Paradox smiled as she simply teleported away, with Momo going with her in a flash of black and purple light.

"NO!",shouted Reo, slamming the ground in rage as magma flew around him,"NO! I'LL KILL YOU PARADOX!"

"Don't worry, little nephew…",chuckled Paraox's lingering voice, even if her body wasn't present,"I'm not going to hurt her…unless I feel I should…"

He immediately turned his head to find Paradox not there, with his eyes turning blue with small, black stars in them before they returned to fully midnight blue one again as he sent out a Geo Pulse strong enough to cover half of Japan, making him growl as he suddenly made Izuku appear in front of him, who was just as confused as he was scared.

"Reo…",asked Izuku,"What's going on? Why are you growling at me? I know you're pissed at Copycat, but don't take it out on me!"

Reo didn't hear his words, having only one person in his line of sight, and it wasn't Izuku,"Paradox…"

Izuku looked confused as he heard the ghost villain's name, making him turn around,"Where? Where is she? We might be able to get her to tell us what she did to Momo!"

That only served to make Reo angrier, as he began to grow multiple times his size, with a large, spiked shell coming out of his spine, before it lay flat on his back. His jaw began to separate slightly before he sprouted two pairs of extra large arms from the sides of his torso, with the bottom left one being made completely of black Taydentite, the middle right was now made of blue wood that had black orbs coming out of it, the bottom right was covered in white fur with blue stripes with two thick claws coming out of it, the middle left one becoming bulky and machine like, with glowing, black wires and blue metal, while Reo's main left arm became white, thinner and sprouted black battery like plugs from his shoulder and along his forearm, with his fingers turning into black plugs as well, while his right arm turned white and blue, with the sides of his forearm reshaping for speakers, as did his right shoulder.

His legs remained covered in magma infused darkness, but they were no longer covering his feet, while his hair grew to flow behind him, forming what could only be described as a flaming lion's mane, which had a thin, curved frill on the top of it.

Reo then looked at Izuku, who turned around and saw his cousin's form, and backed up immediately.

"Reo?!",shouted Izuku, who instinctively activated One for All,"What the hell are you doing?!"

There was no answer besides Reo swinging his Taydenite arm at Izuku, who attempted to back away, before he was pulled back by Reo, whose main left arm had turned into a bulky, planet-like substance, with a swirling, blue, glowing core now on his lower stomach.

He immediately swung at Izuku, before he was blasted away by an energy fist to his chest, sending him crashing into some rubble.

"Sorry, grandson.",said a male voice, with the smoke clearing around him and revealing himself to be a ghost with pointed ears, black and blue eyes, and black and blue flaming hair that had multiple white stars inside it, with bits of blue energy coming off of him, while he had neon green skin, and wore a uniform not unlike Reo's.

His chestplate was completely black with blue strips on the collar, as well as the ends of the shoulder covers and a blue base under his chestplate. His right arm was covered in blue magma, with black charcoal like rocks covering it while black fire flowed off his form. He had a dark gray glove covering his left arm up to his shoulder, and he had gray boots that reached the top of his thighs, with a lack stripe at the top of them.

He also wore a black belt, which had an Omnitrix symbol in the middle of it, with the hourglass being blue while the sides of it were gray.

"I can't let you do that.",says the man, before looking at Izuku,"You okay kid?"

"Yeah…",says Izuku, before asking the question he was thinking,"What happened to Reo? And who are you?"

The man looked at his grandson, who was still knocked down from his attack,"He's gone out of control. I should've stopped it at the training camp, but now I've got to deal with him myself."

He looked at Izuku before slamming his hands together, turning them into crystals as he sprouted crystals from his back,"And as for your other question? I'm his grandfather. The name's Don Fenton, but my codename's Wraith."

"HIs grandfather?!",shouted Izuku,"That's impossible, you should be dead by now, but you look like you're in your thirties…"

"Don't bother trying to sense a quirk or any elemental abilities in me, Izuku.",says Don,"I'm not even from your dimension."

Izuku wanted to say something about that, but Don continued,"Reo's unstable right now. You know he went berserk at the training camp? Well this is worse, especially considering he's fully awakened by the sight of Momo's alleged death.

Listen, he's going to be up in a few minutes so listen close. I'm going to subdue him, and if necessary, take him down. I'm ordering you to leave, now. However, if he does manage to get to you, here."

Don then placed his hand on Izuku's head, with his hand glowing for a second as the green haired teen shivered,"What did you do?"

"I just gave you Ecto Energy.,"says Don,"It's why Reo's powers have gone out of control like this. He has no control over something he never knew he had all along, and his anger has made him see us as enemies, no matter who you are. I'm going off a hunch now and saying that his anchor to his humanity was his family, but if you look deeper, you'll see Momo Yaoyorozu at the center of his humanity.

Your little incident as Ruku made his Ecto Energy stronger, but combining that with the Speed Force messed up and accelerated his abilities before he was both physically and mentally ready for them, resulting in his rampages.

I won't get into the details since it's not my place to say, but Reo's ghost abilities have tied into his non-human half, with his quirks and Speed Force being tied to his human half. I can separate the two, but I'll need him to be completely immobilized before I do. If you wanna help, fine, but you run the second things get too bad for you, or I'll send you back myself."

Don then looked at Reo, who started to get up slowly while growling,"Paradox!"

"Last thing.",says Don, smirking as his left arm began to grow in size, with Taydenite armor on his forehand,"That Ecto Energy I gave you? I've temporarily given you access to everything you originally had, and you can go 100% without drawbacks. It'll end when I take it back, so let's get this over with."

His left shoulder then bean to cover itself in gray, rocky armor while the parts of his arm that weren't covered turned back into the magma covered arm from before, while his hair grew to reach his lower back, with it being gray instead of blue like before.

Izuku looked at him before activating One for All, with Blackwhip covering him like armor, while his hair became teal blue, glowing as he hovered slightly, while Smokescreen began leaking around his wrists, and teal lightning crackled around him and in his eyes, with energy seeping off of them as purple energy surrounding him.

Izuku smirked and looked at his cousin,"Looks like this'll help a lot. Sorry about this in advance, Reo!"

Reo growled and started to run at the two, who did the same, before clashing as the boy yelled once again,"PARADOX! PARADOXXXX!!!!!! PARADOXXXXX!"

Both Don and Izuku each caught one pair of Reo's six arms, with Izuku holding the bottom two while Don held Reo's main two, before the hulking being chuckled softly and morphed his middle hands into rocket launchers, which launched four rockets from each hand, making Don and Izuku back up before Don ultimately tackled Izuku away as the rockets hit the side of a groaning Neito, who then began aging rapidly before he was nothing but bones, which started to heal as much as possible before black, explosive, bombs hit him instead, turning him into bones as he turned to ash, signifying his end.

The two heroes watched as the rockets hit an unintentional target, but it was Don who said something first that made Izuku pause.

"He's got Ultimates…",gasps Don, before growling,"Kid, leave now! This is way worse than anything you've dealt with!"

"What?!",shouted Izuku,"You said I could help, what's so different now?!"

Don started to change his arm back to normal, before it became bulky and white with claws made of green and blue Ecto Energy before speaking,"He has Ultimates, and I'm not sure yet, but if I'm right, he has Ultimate Aliens as his base version."

"What's your point?!",says Izuku,"I'm not just gonna leave him like this!"

"You don't get it, do you?",says Don,"You've met Omni, so you know about his transformations, right? Well, Ultimates are much worse. They're the version of any alien after they've been put in a simulated battlefield for millions of years, making them the most dangerous battle ready version of themselves. And as I can tell, he's evolving his version of his aliens to be the exact thing he wants in his own Ultimate form thanks to his Ecto Energy."

"That makes me want to stay and help more!",says Izuku,"What's the plan, and don't tell me to leave again, cause it's not happening."

"Damn it…",sighs Don,"Teenagers are the worst…fine, try and keep him distracted. I'll see if I can knock the human out of him in order to subdue him, but the moment you see any part of him become filled with stars, you're done. That's an order."

Izuku nodded before jumping backwards, missing a sonic blast from multiple discs that came his way, before unleashing Blackwhip and tying them together, making them blow up as they hit each other with a sonic blast.

"Fine, but we better do this quick!",shouted Izuku, speeding forward to punch Reo, only to have his fists caught.

"PARADOXXXXXX!!!!!",shouts Reo, before slamming his Taydenite arm down on Izuku's head, only for Blackwhip to stop him.

"Reo!",shouts Izuku,"What's wrong with you?! You know me, I'm your cousin!"

Reo doesn't hear anything as he shrank back down, with his shell and extra arms disappearing before his wrists began to glow brightly, burning away Blackwhip as he ran in circles, with his lightning now red instead of black.

Lightning was then thrown at Izuku and Don as the two dodged, with red lightning striking the two.

Izuku managed to dodge as well as Don, before grabbing the lightning and yelling in pain as he held onto it, sending as much energy from both One for All and whatever parts of Speed Force he could into the lightning bolt, before throwing it back at Reo, who yelled in pain as he was hit, while the green haired teen covered his wound in Blackwhip.

"Nice moves, kid.",said Nya, speaking to him from within One for All,"But obviously, elemental attacks aren't gonna work. Reo's Ecto-Energy and Speed Force have both been too enhanced for our quirks to work on him individually."

"Nya is right, and I believe I have a way for you to properly use my quirk.",said Kener,"Our new ally Don has given you some of his own Ecto-Energy, and with Reo having that and Speed Force, he doesn't seem to be immune to the same cosmic forces that he can produce."

Izuku wrapped Blackwhip around Reo as he channeled Speed Force through it as well,"I'm open for any ideas!"

"I am literally telling you to use his energy against him.",sighs Kener,"I've temporarily blocked off my own quirk from his version of Two for All. You need to redirect his energy based attacks and transfer them to your physical strength. From what I've seen, he's keeping his distance because he knows that he's not in the right mind for any close combat."

"Which means he's still got his humanity in there!",smiled Izuku,"I get it, but Nya, remind me of the basic abilities of Speed Force again?"

"Sure.",said Nya,"Super Speed, Inertia negation, Time stopping, Time travel, physics manipulation, etc."

Izuku smiled,"Perfect."

Producing massive amounts of Blackwhip, Izuku ran towards Reo before smirking as he wrapped him in the darkness quirk while using Redirect to absorb Reo's kinetic and Speed Force energy, making sure he was immobilized as his cousin fell to his knees while struggling to get loose.

"Don, do it now!",shouted Izuku,"I can't hold him for long!"

Don nodded while running towards Reo as his legs turned skinny and blue, with skinny and blue with two metal balls connecting to the heel of his feet.

He cocked his arm back as it became black filled with stars, before slamming his fist into Reo's chest, with the teen growling in rage and pain.

Thrashing uncontrollably, Reo roared as he resisted Izuku's hold, while forcing himself to stay together before a ring of black and red flames, electricity, and Ecto Energy appeared around his torso and split apart, covering him from head to toe.

Reo's hair had become black crystals similar to his Full Element, but they were also on fire. His shoulders sprouted electric darkness whips, with his wrists sprouting darkness flames that covered them completely.

Instinctively phasing through the ground, Ret loose of Blackwhip's binds. He then appeared behind Izuku, before punching him with an enlarged dinosaur looking fist, sending him flying at Don, who caught him, but ended up getting pushed back a bit.

"This isn't working.",says Izuku,"He just got more powerful, what are we going to do?"

Don looked at his wrist and smirked,"How do you feel about possession?"

"Why?"

"I'm gonna need to take over your body for a bit.",says Don,"Unlike Katso, I'll be able to draw out our full power without putting a strain on either of us."

"Let's do this then!",says the green haired boy, before Don turned intangible and flew into him,"I'm never getting used to that…"

Suddenly, Izuku's hair became green and black fire, with a blue and green Omnitrix symbol appearing on his chest, while his hero costume appeared and the black lines were now green, with the base now black. His gloves were now green as well, with a few blue striped lines on the ends of them.

"Izon is born.",says the newly born fusion, before he immediately appeared in front of Reo, punching the teen ghost in his face, making him growl in pain as he staggered backwards.

Izon smirked before activating One for All, with multicolored lightning surrounded him, with Blackwhip wrapping around Reo as it was set ablaze, with Reo growling and yelling as he continued to thrash about.

Izon made a clone of himself that had Full Cowling at 100% with all quirks active, before slamming the Omnitrix on his chest, and being covered in green flames as black stars appeared in the flames, with Izon becoming more muscular. Izon grew two small horns on the top of his head with a third, longer in the middle.

"GHOST X!",said the new being, with Reo growling at him still, before becoming his own version of the same being, with red stars and black flames.

Ghost X then activated One for All, with lightning sparking as he did, making Reo's eyes widen as he attempted to get loose.

Ghost X then did something Reo thought impossible.

He slammed the Omnitrix on his chest, becoming black with white stars and green flaming horns, with the horns now covering his head as if they were a flaming crown that resembled Izuku's hair. He grew to be more muscular as Blackwhip armor had covered him, seemingly becoming sentient as well. He floated in the air as smoke surrounded him, with it seeping from his shoulders as if it was a cape. Cracks appeared on the right side of his face, with it reaching his chin. Energy surged around his left and right arms, being covered in the purple energy that is Redirect, with Speed Force sparking around his entire form.

Reo saw this and suddenly used an eye blast on the duplicate that was binding him, before flying away with every bit of speed and power he had. Every instinct he had told him this being was not Paradox, but he also had no chance. He looked backwards to see the being still standing, making him smile as he flew further, only to realize he hadn't moved once he looked away.

"Ultimate Izon X!",shouted the Quirked Celestialsapian Ghost Hybrid, before raising his arm and pointing a finger downwards, making Reo crash into the ground as he felt insane amounts of gravity, making him morph his arm into a spiky, bulky, red sword before he was pulled towards Ultimate Izon X, with the teen smirking as he held his arm the alien's head, before feeling a punch to his gut as he spat up green blood, feeling himself being split apart once again before he willed himself to punch Ghost X, only to be pushed back as he was fully separated from his human self, with a blue haired teen flying out of him and crashing into rubble, with the ghost seeing red as it attacked and thrashed about, before flying towards its human self.

About to attack the unconscious boy, a barrier of Ecto Energy surrounded the ghost, before wrapping around him and shrinking as he yelled and growled in rage, only for nothing to happen.

Ultimate Izon X then transformed back into Izon, before the teen glowed and Don phased out of Izuku's body, floating in the air as he grabbed the orb filled with the ghost, before sighing as he made the orb disappear.

"Alright, let's get outta here.",says Don,"I can take us back to U.A., but seeing as everyone's seen me, I can't go back to the Ghost Zone yet…"

He then put his hand on Izuku's shoulder and levitated the unconscious body of Reo to him while teleporting the three away, before reappearing and sighing.

"I'll handle crowd control then."

A few weeks later

The fight was over. The heroes had won, but it was at a terrible cost.

Momo Yaoyorozu had been proclaimed dead, and even without a physical body, U.A. received a massive lawsuit from the Yaoyorozu family.

Don had handled the crowd, fixing up the damage in the fight as best he could, while providing the cover story that while All Might had defeated All for One, Neito had self-destructed out of desperation.

He had since been living at U.A., with the public seeing him as a new teacher for the Hero Course alongside Toshinori.

The students had been going about their schedule normally, though while Bakugo was calmer than he normally was, and Izuku, Shoto, and Iida were all on house arrest, they were only not expelled due to a technicality of Omni giving them permission and already having his provisional license.

Iida was given the title of Class Representative once his house arrest was over, and while he accepted it, he didn't like how it was given to him every time he looked at the empty seat in class.

Reo had been since put in therapy, and if he wasn't in Hero Course classes, he was always at either Nezu, Aizawa, or Don's side, except for when he was in his room. He was allowed to study with the other teachers, but only after the normal classes were over. He was also only allowed to stay at U.A with the requirements that he'd wear a bracelet on each arm that suppressed his quirks, and a collar that kept him from accessing the Speed Force if he wasn't in class, as per the HPSC and the Yaoyorozus orders.

He was less social after the battle in Kamino, not even talking to Shoto or Izuku. He simply ate, studied, fought, and even when he did, he almost always ended up getting beat, especially in 1v1 battles against any of his classmates.

1-B had since gotten two new students after Neito's betrayal. Kenshi, until he could get back to his dimension along with Deku, had joined the class due to having a personal relationship with his version of Momo, meaning that he was kept away from Reo as much as possible as to not cause trouble.

There was a transfer student from America named Gedo Zillian who was the son of Godzillo, and he was the student who would permanently be replacing Neito.

All in all, the students of U.A. were greatly affected by the recent events, but only one question remained in each of their minds.

'What's going to happen next?'

That's it for the Rescue Arc! Finally got that over with, and it was very tiring but fun! Reo has finally faced some punishment, but where has Paradox taken Momo?

Also, I decided to change this chapter's name at the last minute, sorry for any confusion!

New OC has been introduced, and Kenshi will be interacting with both 1-A and 1-B! Don is now a teacher and Reo's newest guardian!

I'd started this chapter around the same time I started this arc, so ideas have been popping up in my head a lot lately!

This chapter has not been beta read by ShonenKing94 due to me making it a secret out of excitement!

Powerhouse, out!