Deku the One For All Legend (Bnha multi crossover fanfic)

What Vegeta knows

      The next day at UA it was a rather boring day. Once lunch started, Izuku was walking with his friends Ochako, Goten, Trunks, Lucas, and Artih. While they were walking to the lunchroom they were talking about their idled pro hero. Unsurprisingly, Izuku's idle is... you already know. But surprisingly to atleast Izuku, Trunks and Goten both idolize Izuku, or as they like to call him, Bomb Shelter.
"YOUNG MIDORIYA IS HERE!!!" All Might said having six stop in their tracks.
"Hey All Might! What is it?" Izuku said.
"Lunch... want to eat with me?" All Might said being Dad Might.
"That's adorable!" Ochako said giggling.

After that, Izuku and Toshinori went to All Might's office. Little did Izuku know was that Vegeta was there as well.
"Hmph. Took you long enough!" Vegeta said.
Izuku sat on the couch next to Vegeta that was facing the couch where All Might was sitting in.
"Young Midoriya, do you remember what I told you before I gave you One For All?"
"EAT THIS!" Izuku said using his All Might face.
"What!? No, not that part. The part where I said that our quirk was passed down like a torch." All Might said pausing for a minute.
"The part that I didn't tell you was... remember the scar I had before you gave me that senzu bean to heal myself?" All Might asked.
"Yeah! You said that a villain gave you that scar." Izuku said.
"I never told you who this villain was, that villains name, is All For One." After that, Izuku was confused.
"Okay, but what does this have to do with One For All?" Izuku asked.
"Well, All For One's brother was supposedly quirkless. All For One gave him a quirk and little did he or his brother knew, was that his brother possessed a quirk that was to pass down quirks. The quirk that only gets stronger for every person it's passed down to." After All Might explained what he knew Vegeta decided that now would be a good time to step in.
"Do you know why that quirk gets stronger?" Vegeta asks.
"Isn't it like a stockpile type of quirk?" Izuku asked.
"Have you noticed when you activate your quirk lightning surrounds your body? Have you also noticed that it closely resembles a Super Saiyan?" Vegeta asks with both All Might and Izuku confused.
"Let me tell you where All For One GOT said quirk. My Father told me about the menace that Brainiac taking over worlds like us Saiyans did. Little did we know was that Frieza, my and Kakarot's nemesis, was working with Brainiac. On Earth, there was a war going on between both heroes and villains. This is when quirks became more and more of a thing.
Heroes and villains decided to call a truce and take down Brainiac, but he himself had a successor. That successor was All For One or that's what he called himself. Before Brainiacs defeat, he went to the planet of where a ritual for Saiyans took place. The ritual to turn Saiyans into Super Saiyan Gods. After years of the ritual, the Grand Priest and the Omni King named him the Saiyan God Yamoshi. He was powerful. From what I heard of, he was more powerful than any Saiyan I've ever heard of. But... one day, Brainiac went to Yamoshi's planet and brought out All For One to approach him. He challenged him to a dual of which Yamoshi proudly accepted, he was a Saiyan, how could he say no? Yamoshi at first had the upper hand undoubtedly, but Brainiac shot something at Yamoshi to stop him from killing his successor. After that, All For One used the quirk that Brainiac gave him and to steal all the power and life essence from Yamoshi that eventually killed him. This aged All For One badly for he couldn't handle the power of the Saiyan God within him. Brainiac adjusted his successor so he could handle such a power. Once Brainiac was defeated, All For One took his mantle and became the self named symbol of terror." After explaining the story King Vegeta told his Son, both Izuku and All Might were taken back and were horrified to hear that someone actually had the ability to kill a Saiyan, let alone a God! (With help).
"H-holy shit!" All Might said pale.
"I have a theory... since both of you hold this power, if you two are powerful enough and have enough training with ki, maybe, just maybe, you could contact Yamoshi and probably become Saiyans seeing that he IS One For All. This is why I wanted to train Izuku over here to have him be as strong as a Saiyan, of which he right now is. He's just a tad weaker than a Super Saiyan Blue." Vegeta said with Izuku looking down and All Might having his mouth wide open.
"Now then, Toshinori, I'm gonna train you myself."
"But what about my students? They'll be going to the USJ soon and I can't just leave them!" All Might said.
"If you're worried that much about it I'll have Bulma send Kakarot to the USJ with your Students, now let's go! The sooner we begin training the better!" Vegeta said.
"Don't worry All Might! I'm sure we'll be fine! If anything happens then we'll be ready, I won't let anything happen to my friends!" Izuku said holding his fists out in determination.
'I'm so glad I made him my successor! He's the pure definition of a hero.' All Might thought.
After All Might and Vegeta left lunch was done and Izuku went back to class.

The next morning in class everyone was sitting down either playing on their phones or mumbling while taking notes like a madman *cough* Izuku *cough*.
"Alright class, I have an important announcement to make. This will decide your future." Aizawa said with everyone nervous.
"You will be choosing a class rep." At this everyone started shouting that they should be class rep until Tenya spoke up.
"Everyone! I suggest we do an election to choose a representative!"
"I think you're just saying that because YOU want to be rep!" Kaminari said.
"Besides, how do we know if everyone will just vote for themselves?" Kirishima asked.
"Then we will choose the one who has the most votes!" Tenya said with his hand chopping.
After all the votes were tallied up, Lucas Rūnworth had five votes while Momo had two. Izuku had one vote though he didn't even vote for himself.
"ALRIGHT YOU IDIOT'S! WHO VOTED FOR GEEZER HAIR!?" Katsuki yelled.
"What? Did you think anyone was gonna vote for you?" Sero said from behind Katsuki.
"WHAT THE FUCK DID YOU SAY SOY HAIR!?!?" Katsuki yelled.
After awhile it was time for lunch. The group of six found each other and ate lunch.
"So guys, what'd you guys do?" Goten asked.
"Oh, we just chose a class rep, we had an election and Lucas won with Momo being the vice rep." Ochako said.
"Huh! Funny thing is, we did the same thing!" Trunks said.
"Oh yeah? Who's the rep in 1B?" Lucas asked.
"Well, I'm the class rep while Trunks is the vice rep." Goten said.
"Oh, by the way, if we're done talking about that. You wanna hear something kinda wholesome?" Goten said.
"Sure! What is it?" Ochako asked.
"Okay, so you know that one Saiyan who's giant as all get out and is actually just a big teddy bear?" Goten asked.
"You mean Broly? What about him?" Izuku asked.
"Well he actually thinks of you as his little brother Bomb Shelter! I think out of all of us he's got the biggest soft spot for you." Goten said.
"THAT'S THE MOST ADORABLE THING I'VE EVER HEARD!!!" Ochako yelled with Izuku blushing at her cooing.
"Yeah, we kinda act like brothers as well. He couldn't really pronounce my name right so he just calls me Izunu." Izuku said.
"He has a hard time pronouncing some words. But he can pronounce a lot of Saiyan names flawlessly." Trunks said.

WARNING: LEVEL THREE SECURITY BREACH. ALL STUDENTS PLEASE EVACUATE THE BUILDING IN AN ORDERLY FASHION.

"Well fuck! And we were having a nice time too." Lucas said.
After that alarm went off everyone was going through the halls like wild animals in a cage until Lucas saw that it was just the media.
At this, Lucas powered up his aura to raise his voice.
"EVERYONE! Calm down! Look! It's just the media on their bullshit again!"
"LANGUAGE!" Tenya shouted.
"Yes Dad." Lucas said.
"EXCUSE ME WHAT THE... you know what, never mind." Tenya said. After that everyone calmed down and went to class.
"Well! You seemed to have calmed down the entire school by raising your voice." Izuku said.
"As expected from the class rep! Someone as intelligent as you are is something we all look into for said position!" Tenya said with his hand chops.
"Aw guys! All I did was power up to make my voice heard." Lucas said.
"He may be smart, but I swear he has his moments." Artih said.
"Hey! Not like you don't!" Lucas said defending himself. At this the group started laughing their asses off.
"LANGUAGE!!!" Tenya said.
"Iida, not this again! Quit breaking the fourth wall! You know how expensive these things are?" Izuku said.
"*sigh* I'm on it." Sero said taping the fourth wall up.

Okay, so yeah, the reason why Izuku is so powerful is because One for All was made by the power and life essence of Yamoshi, which in this fanfic is the Saiyan God. Will Deku and All Might get in contact with Yamoshi? Find out next chapter once we get this fourth wall fixed that Iida so rudely broke.
"IT IS MY DUTY TO MAKE SURE THERE IS NO FOUL LANGUAGE ANYWHERE! THAT MEANS YOU TOO READER!"
GOD DAMMIT IIDA!!!!
"LANGUAGE!!!!"
FFFFFFFFFUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU...!!!!