So I may have a few other stories I'm currently working, but I was browsing Deviantart and came upon an artist called OneForAll2021(Formerly Kashiopea94). I liked a lot of his work (which is why you should check his stuff out), particularly his various crossover artwork between My Hero Academia and various other shows. Inspired by that I decided to write this. Not every thing he's crossed over with MHA will be included, though a good amount of it will. I will also be crossing this over with other shows that he hasn't done. With that out of the way, let us begin.

Chapter 1: High Hopes

The sun shone high over Musutafu Japan. On this morning, the streets of the city were in chaos as a giant villain rampaged on the train tracks. A crowd gathered to watch as if it were some kind of spectacle. Making his way through the crowd was a boy with curly forest green hair dressed in a black middle school uniform. This was Izuku Midoriya a fourteen year old middle schooler. He looked up to see a hero with limbs appearing to be made out of wood flying through the air as he avoided the villains attack.

"Oh wow it's the up and coming star Kamui Wood." Izuku gushed.

"Well looks like your quite the fanboy aren't ya kid?" An older man next to him noted.

"Oh well yeah kind of." Izuku sheepishly admitted.

Kamui, who had branched out his arm and wrapped it around the villain's, was flung by the villain. Releasing his grip, the hero graceful flew through the air, flipping upright and skidding to a stop.

"After attempting a robbery you illegally use your powers. In the middle of rush hour no less. You truly are the incarnation of evil." Kamui declared as he readied another attack.

"Ohhh here it comes his pre-emptive…" Izuku began.

"Binding… Lacquer Chain Prison." Kamui shouted as he shot out his right arm.

Branches of wood erupted out of his arm towards the villain at a multitude of angles.

"Canyon Cannon." A woman shouted.

Dashing on to the scene was a woman in a skin tight body suit who flew in and slammed both her feet into the villain, right before Kamui Wood could do anything. The villain landed on his back knocked out with a thud while she landed gracefully on her feet.

"Today's my debut. I'm Mount Lady. Nice to make your ass-quaintance." She greeted was she stuck out her butt.

In response a multitude of boys took photo after photo of her. As the villain was secured by police, Mount Lady vainly took in all the praise, much to the annoyance of Kamui woods. Ignoring this, Izuku wrote in his notebook labeled 'Hero Analysis for the Future #13'.

"Gigantification… definitely a good quirk. That coupled with her looks will certainly make her popular. However the damage her quirk can cause to the city plus the difficulty of moving through narrow alleyways could cause problems. Though if she can control by how much she grows maybe not so much." Izuku muttered as he jotted down notes.

"Hey hey I see your taking notes there. I'm guessing you want to be a hero right? Well I'm rooting for ya kid." The older man proclaimed.

Izuku turned to the man and gave a confident smile.

"Thanks, I'm aiming for the top so be sure to look out for me when I graduate." Izuku declared.

"Hey Izuku there you are." He heard someone called out to him.

He looked to see a boy about his age with ruffled burgundy tipped black hair, which was combed back. On the top left of his forehead was a large birthmark that seemed more like graze. He was dressed in the same uniform as Izuku but also wore hanafuda earrings. The boy smiled kindly as he waved to Izuku.

"Oh… Tanjiro." Izuku expressed as he ran up to him.

"I had a feeling you'd be here. You get any good notes?" Tanjiro inquired.

"Yep, there was a new hero that debuted today so I was able to add someone new to the book." Izuku stated.

"Good to hear, now come on we best hurry or we'll be late for school." Tanjiro stated.

"Right." Izuku expressed.

The two friends hurried off towards their school.

Later that day, Aldera Junior High…

Izuku sat in the classroom next to Tanjiro. The teacher stood before them a pile of papers on his desk.

"Alright everyone it's time to start taking a serious look at your futures." The teacher stated. "Now I have these career forms to hand out but…"

He tossed the papers into the air.

"Let's face it you all want to heroes." He stated with a smile.

The class erupted into a cheer as each student showed off their quirk. Izuku and Tanjiro didn't join in on this however, they looked at each other with confident smiles.

"Yes yes you all have impressive quirks. But rules are rules and your not allowed to use them in school." The teacher scolded.

"Hey teach don't lump me in with these losers." An ashen blond boy stated.

Both Izuku and Tanjiro sighed as they knew what was coming. The blond leaned back against in his chair.

"You think these guys and their shit quirks can compare to mine." The boy cockily stated.

"Get over yourself Katsuki!" One student shouted.

"Yeah your not that much better than us!" Another shouted.

"Like I give a crap what you extras have to say." Katsuki replied.

"A yes Bakugo." the teacher noted with some disdain. "You're aiming for UA High if memory serves me."

"What? UA? They have the lowest acceptance rate in the country." One student noted.

"I heard the cutoff score is 79 this year." Another added.

"And that's exactly why I'm going." Katsuki stated as he leapt onto his desk. "I aced the mock exam. I've got the quirk, the skill, the smarts, and the talent to get into UA. And once I graduate I'll surpass even All Might and become the best of the best. All with the added bonus of earning a shit load of money."

"That reminds me… Midoriya, Kamado your aiming for UA." The teacher noted.

The room became dead silent as all eyes turned to the duo. Three Izuku thought. Two Tanjiro thought. One they collectively thought. The entire class erupted in laughter.

"Okay this has to be a joke. Midoriya doesn't even have a quirk." One student pointed out.

"Like Kamado's any better. What are you gonna do smell your enemy to death." Another student noted.

Izuku and Tanjiro simply ignored their jeers. Katsuki came charging in ready to slam an explosive palm down onto Izuku's desk, only for Tanjiro to catch it.

"What the…" he began.

He sent another attack towards Tanjiro, only for Izuku to catch it.

"Katsuki, you know you shouldn't be attacking your classmates right?" Tanjiro stated.

"Grrr…" Katsuki growled.

"Calm down Kacchan. We all know you don't want to ruin your chances of getting into UA." Izuku stated.

Katsuki took a few deep breaths and calmed himself down. Izuku and Tanjiro let go of his arms. He backed off but continued to glare at them.

"Still pisses me off that you two think this 'special training' of yours will change anything. You'll still be nothing but worthless trash." Katsuki stated before returning to his seat in an annoyed huff.

The teacher sighed and class continued as normal.

That same day, Noontime, Downtown Musutafu…

A man made of sludge burst out of a store cash flying off of his body.

"Stop thief!" The store owner shouted.

"Ahahaha… catch me if you can!" The sludge man shouted.

He ran down the street as fast as he could.

"Where's a hero when you need them." One person noted.

"Normally someone shows up right away. Guess the chaos from this morning still keeping them busy." Another person noted.

"Jezz… you'd think these people would find something better to do with their quirks." The first person noted. "There's no end to them I swear."

Unbeknownst to them, a frail looking, unremarkable blond haired man was behind them overhearing all of this. Looking to see if anyone was looking his way, he bulked up into a form all would recognize.

"There is an end." All Might stated.

Everyone turned to look with faces fill with shock, awe, and happiness.

"Because I am here." He proclaimed.

He charged headlong, straight towards. The sludge man looked in panic as the number one hero was now hot on his heels.

Later that day, Aldera Junior High…

The school day had come to an end. Students gathered with their friends talking about what they'll do after school. Izuku put his notebook into his backpack.

"You ready Izuku?" Tanjiro asked as he walked up to his friend.

"Yep let's get going. We don't want to be late." Izuku replied as he threw his backpack on.

"Oyy… you two, where not done talking." Katsuki stated as he and his lackeys walked up to the duo. "If you two losers are serious about going to UA then I suggest you don't. I'm supposed to be the one from this shit school to go there. I don't need you two ruining my story."

Tanjiro and Izuku sighed.

"Listen Katsuki, nothing you say or do will change our minds." Tanjiro pointed out.

"He's right Kacchan we've been training hard for almost eight years now. We're going to UA and we're going to be heroes." Izuku added.

"Grrr… it's that right there that pisses me off. The fact that you pebbles think you'll be anything other than that is beyond irritating!" Katsuki declared.

Izuku was about to respond, but Tanjiro stopped him, shaking his head against it.

"Let's go Izuku we're going to be late." Tanjiro stated.

"Your not going anywhere not as long as I stand here." Katsuki declared with crossed arms.

Izuku and Tanjiro looked to each other, shrugged, and headed towards the window, much to Katsuki and his lackey's confusement. The two got on the windowsill.

"Hey wait what are you two…" Katsuki began.

Suddenly both Izuku and Tanjiro hopped out of the window.

"WHAT THE HELL?!" Katsuki and his lackey's shouted.

They rushed to the window and looked out it. They saw Izuku and Tanjiro walking away having sustained no bodily injuries despite jumping from the school's second floor. Katsuki and company were too shocked to even speak. Izuku and Tanjiro made their way off of the campus and down the street. Along the way ran into Tanjiro's younger sister Nezuko before parting ways. She had gone home while they headed off somewhere else. The two made small talk as they headed down a secluded street. Eventually the duo come under a bridge. It was there that Tanjiro stopped. Izuku noticed this.

"Tanjiro, what's wrong?" Izuku asked.

Tanjiro took a deep breath through his nose. He turned himself to the manhole cover behind him.

"Someone's coming and they're bad news." He stated.

Both Izuku and Tanjiro began to back away. Flowing up from the sewers below, was a man made of sludge.

"Two medium sized vessels, perfect." The man stated.

"A villain?!" Izuku exclaimed.

"I only need one of you to get away from him. Come here!" He declared as he charged towards the boys.

They both began to breath in a unique way. Quickly they leapt out of the way, going in opposite directions. Based on what he said it likely means a hero is hot on his tail. But how long till they arrive? Izuku thought to himself. The sludge man stopped and sent out multiple tentacles to try and capture them. Ducking and leaping deftly, Tanjiro and Izuku avoided all of the man's attempts to grab them.

"Grr… stay still you brats." The villain stated.

This isn't good, we don't know how long till who ever is chasing him arrives. Tanjiro thought to himself. He duck under another attack. We need something like a sword if we want to be able to fight back properly. Izuku rolled out of the way of another attack. He picked up two decent sized branches from off the ground as he did.

"Tanjiro here!" He shouted as he threw one of them right were his friend was heading.

Tanjiro caught it as after leaping over another attack. The two friends stood on opposite sides of the villain. The had their branches readied as if they were swords. What are they planning? The villain thought to himself. The two charged right at the villain, much to his surprise.

"Coming right towards me? What do you want to be my vessels?" He questioned. "My bodies made out of liquid you fools no physical attack will harm me."

The two didn't answer. It's because of that body that we will defeat you in this way. As long as we take in our breaths before we charge in, it won't matter that we can't breath inside you. Water Breathing Sixth form… They both thought. They charged right into the man's body. Maelstrom! The man's body exploded outwards from the force of their combined technique. The two breathed out. They dropped their now broken sticks. They looked to each other with a smile and bumped fists.

"Looks like we were on the same page as usual." Izuku expressed.

"Yep," Tanjiro replied.

Suddenly, the manhole cover was shot up by an unseen force.

"Gah!" Izuku expressed as he readied himself for another villain.

"Don't worry, it's the hero who was chasing the villain." Tanjiro assured him.

Much to both of the boy's surprise, All Might was the one to burst up out of the sewers.

"Fear not citizens for I… am… here?" All Might express in confusion.

Both Izuku and Tanjiro's mouth practically hit the floor in shock. All Might looked at the splattered remains of the villain in confusion before looking to the two boys.

"Excuse me young lads what happened the villain here? Was this your two's doing." All Might asked.

They didn't say anything for a bit before breaking out of their dumbstruck state.

"Oh uhm… yes sir. We were attacked by the villain and had to defend ourselves." Tanjiro explained.

"I see, you two must have impressive quirks then. Don't worry, I won't get you in trouble for using them." All Might stated, giving them a thumbs up.

"W-well… actually we don't have all the powerful quirks. In fact I'm actually quirkless." Izuku explained awkwardly.

"Quirkless?" All Might questioned.

"And my quirk is [Super Smell]. It gives me an increased sense of smell. At first it was just normal scents. But now I can smell emotions, distinguish between things, and track anything even if it's non-living over fairly long distances." Tanjiro explained.

I see… then. To do this, they must be learning one of those breathing techniques. All Might mentally noted.

"Impressive you two, it seems you've trained hard to be able to defeat such a villain." He expressed. "Speaking of the villain…"

All Might noticed that sludge was starting to congregate in one spot. He took out two two liter bottles of soda and emptied them. In an instant All Might had collected all of the sludge villain's remains and sealed him tightly in them.

"Best get this guy to the police." All Mights stated.

"Ooohhhh…" Izuku and Tanjiro expressed in amazement.

"Speaking of which you two also might want to get going. I'm guessing your instructor wouldn't appreciate you two being late." All Might stated.

"Huh… how did you…" Izuku began.

"Ahahahaha… young man, while I don't use that breathing technique myself, that doesn't mean I don't know my fair share of heroes who do. I realized you knew them when you said you'd taken this villain out without the use of an offensive quirk." All Might explain as he secured the villain in his pocket. "Keep up the good work you two, if your at this level already you two will be pros in no time."

Izuku and Tanjiro smiled brightly.

"Yes sir!" The replied.

"Take care." All Might expressed before taking off.

The two looked up in awe as they saw the number one hero fly away.

"Wow I can't believe we met All Might in person." Tanjiro expressed.

"I know right… wait… … … I FORGET TO GET AN AUTOGRAPH!" Izuku shrieked.

"Ahhh… me too. We so enamored from seeing him it completely slipped our minds." Tanjiro expressed.

Izuku's expression became downcast.

"I can't believe I forgot." He muttered.

"Well… who knows, maybe we'll see him again and we can ask for it then." Tanjiro stated.

"Yeah… well we should get going or we're gonna be late." Izuku pointed out.

Tanjiro nodded and the two continued on their way.

Later, at a local dojo…

An elderly man with a red tengu mask over his face looked down at a bowing Izuku and Tanjiro.

"You were late." He sternly stated.

"We're sorry!" They expressed.

And that's a wrap. Hope you guys enjoyed this so far. Out of curiosity, should I include more power systems other than breathing styles and quirks in this or keep it to just those two. A part of me wants to add multiple power systems to make things more fun and chaotic but another part of me doesn't want to have to change them to balance them out with each other. I can make it work either way so I figured I'd see what other people thought. Anyways have a happy Thanksgiving, till next time.