I do not own One Piece or My Hero Academia that belongs to their respected owners
There will be references from other anime, shows, games, and etc that I also don't own.
Opening to use My Hero Academia opening 3-5 or One piece Superpowers by Dave full credit to Dave music.
Ch. 11
The Demon Heir vs. Part 4 Finale
Deku and Ochako vs All For One!
As Izuku/Bullet's colossus form crumbled as he was tired of using his newly awakened power.
Then Hisashi appeared behind Ochako and Eri.
And he promises to protect Eri with his mighty axe then Ochako jumped down and ran to Izuku/Bullet's side and smiled.
"It's time to end things wouldn't you agree? Chako chan?" Izuku/Bullet said as Ochako jumps down to his side.
"Right! Deku kun!" Ochako said with a smile she moved into a fighting stance.
"Heh, what's this? You and some girl is gonna beat me? Yeah, right you two are insane as Roger was." All for One said.
"Sounds like you're scared of fighting me? Well, how about a challenge?" Izuku/Bullet said with a devious tone.
"What is this challenge?" All For One asked as he wondered what type of crazy idea Izuku/Bullet has this time.
"It's just a fight between you vs Ochako and I. And just like last time no help just you and the powers you have." Izuku/Bullet said
"And what if we refused?" Akainu said with a glaring sight.
"Yeah, I thought you were going to say that… That's why I constructed this while we were talking." Izuku/Bullet said as he used his powers to create a giant warhead shape bomb?!
"What is that?" All For One asked with worry.
"Isn't obvious it's a bomb one that would negate any quirk users and devil fruit within 5 miles radius so not only I can negate quirks and slash devil fruit users for 10 minutes it's just enough time to slaughter the whole lot of you. Before any of you blink." Izuku/Bullet said as he prepped the bomb.
"You're completely insane. And first, of how you know it's temporary and not forever?" All For One said with a calm tone.
"I don't… for the quirks that is...And that's why it's fun! Of course, in theory, the shockwaves will temporary damaged your nerves which would result in people not moving normally which is vital since people need to move to use quirks." Izuku/Bullet said with a crazed look.
"Deku are you joking right?" Ochako asked with a concerned look.
"Eh, I could be joking but hey it all depends on Lord Dark Helmet over there." Izuku/Bullet said as he pointed at All For One as a joke.
Meanwhile in the news copter
"THIS IS INSANE DOUGLAS BULLET IS BASICALLY THREATENING THE VILLAINS TO SUBMIT TO HIS CHALLENGE!" The newswoman said
Back at the battlefield
"This kid is insane!/Now I regret framing him in prison." All For One and Akainu thought at the same time.
"Well? Your answer?" Izuku/Bullet asked
"Fine, you brat you win just disable the bomb." All For One said in grumbles.
"Good but first swear it to the Pirate Code." Izuku/Bullet said deviously.
"Fine, I swear it to the Pirate's Code." All For One said in defeat.
"Good…" Izuku/Bullet said as he disables the bomb he made.
"Okay, now that the bomb is disabled we start NOW!" Izuku/Bullet said as he charged at All For One and Ochako followed suit after.
Meanwhile at the Midoryia Home.
Inko and Boulder were watching the news when Ochako's parents came at the front door and ran in front of the t.v.
"OCHAKO!" Ochako's parents screamed in terror.
"Calm down you two Izuku will do anything for Ochako'saftey," Inko said
As the two parents are still worried about their daughter.
Back at the Battlefield.
As Izuku/Bullet and Ochako ran at All For One. All For One used an air quirk he stole and aimed it at Ochako.
"Now, die!" All For One said as he activates the quirk…or tried to at least.
"NOT SO FAST! DARK VORTEX!" Izuku/Bullet yelled as his hand was aimed at All For One and was covered in darkness.
"Huh?...WHAT?!" All For One said in confusion and was pulled in by Izuku/Bullet's dark dark fruit powers and was grabbed by Izuku/Bullet thus resulting in All For One's quirk being negated.
"NOW OCHAKO!" Izuku/Bullet yelled as Ochako jumped at All For One and punched him.
"5% SMASH!" Ochako yelled as she punched All For One in the face.
"What the?! No one could hit the boss that easily?!" Mustard said in shock.
This act shocked everyone for two reasons:
One, All For One is a yonko level villain (sort of more like high commander level due to either skill or aging).
Two, Izuku/Bullet had the power to not only negate devil fruits but also with the dark dark fruit.
This is kind of like how Blackbeard punch Whitebeard (even though it is technically not canon.)
"GRR…YOU BRAT THAT HURT!" All For One yelled at the two but quickly moved away from All For One's range.
"That's the point! Gekishin!" Izuku/Bullet yelled as he ran towards All For One with a tremor bubble in hand and exploded into a great shockwave!
CRACKLE…CRACKLE…CRACKLE!
CRACK…CRASH!
All For One felt the tremors traveling throughout the body but mostly shattering his ribs.
"TAKE THIS! ONE FOR ALL: FULL COWLING! 8 PERCENT! " Ochako yelled out as she was covered in pink lighting and kicked All For One in the back.
SMASH!
"GUGH!" All For One reacted as his mouth began to bleed due to the shattered ribs and a slight increase of power against All For One's back.
"YOU DAMN BITCH!" All For One yelled out as he used some of the stolen quirks he had used and combine just like how he had used against All Might but this time with Armament Haki. And tried to punch Ochako.
"Oh, no you don't IRON BUILD: SMACK HANDS!" Izuku/Bullet yelled as his arms become gigantic robot arms as he covered his arms with Armament Haki as well.
CLASH!
The punch was blocked by Izuku/Bullet's robotic fist and something unexpected happened that no one expected.
VRRRRRRMMMMM!
As the ground was destroyed by the two's clashed in will in strength.
Many marines and Freiza force members were knocked out by the clashed of Conqueror's Haki.
"So, you used the Conqueror's Haki too? Strange that you didn't use it in our fight. Did you only unlock it after you fought me?" Izuku/Bullet said as his haki was overpowering All For One's haki.
" SHUT UP YOU! YOU LITTLE BRAT I ALWAYS HAD CONQUEROR'S HAKI I JUST NEEDED MORE TIME TO OBTAIN IT!" All For One said as he lied as he does not know that Conqueror's Haki is born with 1 out of a million.
As the two stopped their haki clash.
"Heh, shows what you know Conqueror's Haki is something you are born with not something obtain or stolen. Idiot…" Izuku/Bullet mocks the old villain.
As All For One glared at the pirate Ochako punched him in the face which stuns him and uses zero gravity to make him float.
"NANI?!" All For One yelled out in confusion.
"GOT YOU! IRON BUILD: SLAM CANNON!" Izuku/Bullet yelled as a cannon fired at All For One with dirt.
Then Ochako released All For One from her quirk.
"RE…LEASE!" Ochako said as she made her finger touch each other on both hands.
CRASH!
"CRAP!" All For One yelled out as his back was nearly broken.
"Face it All For One your era is now long gone and the next generation will surpass the last." Izuku/Bullet said.
"THAT'S IT KID I'M GOING TO KILL YOU AND THAT GIRL TOO IF IT'S THE LAST THING I DO! ULTIMATE COMBINATION!" All For One yelled and ran towards Izuku and Ochako as his arm combined the quirks he had on him.
"Time to go beyond! UPGRADE BUILD: POWER FISTS! NOW ULTIMATE FAUST!" Izuku/Bullet yelled out as his cannon transformed to a green spikey version of the Smack Hand then covered his hand in haki and made it twice it's original size.
CRASH!
As the two monsters clashed again Ochako then ran at All For One and tried to punch him but All For One use his free hand to catch her. And threw her away from Izuku/Bullet's location more specifically behind All For One.
"OCHAKO!" Izuku/Bullet yelled as he was distracted which led to All For One overpowered his Power Fist.
CRASH!
"GAHH!" Izuku/Bullet yelled in pain as he was sent back to a pile of rumble but drop two red boxes one at All For One's location and one between Izuku and Ochako.
As the dust clears up Izuku/Bullet and Ochako were both laying on the ground defeated? And Izuku/Bullet had his arm destroyed.
Meanwhile with All Might
"No young Uraraka! Young Midoriya!" All Might yelled out in worry.
"Deku...Round Face..." Kastuki said
Back at the Midoriya home
"IZUKU! OCHAKO! NOO!" Inko and Ochako parents screamed out loud.
With Izumi crying and Boulder howling.
Meanwhile with Eri
"Mama...Papa...Don't give up..." Eri said
Back at the Battlefield
"This is the best of this era's monster and the next generation of heroes." All For One laughs at the fallen hero and pirate.
But then...
"Uh... That sure got me." Izuku/Bullet said as his arm began to rebuild itself?!
"Deku! ARE YOU OKAY?" Ochako yelled out as she got up.
Clank...clank...clank
"Yeah, I'm alright." Izuku/Bullet said as his arm completely rebuilds itself.
"NO! THAT'S IMPOSSIBLE MY RECORDS SHOWS YOU DON'T HAVE A HEALING QUIRK!" All For One yelled out in shock.
"But wait even though he was impaled by several sea prism spikes he still survived. And it would explain the healing factor." Mustard said
"Well, it doesn't matter because I'm going to end this once and for all!" All For One yelled as he emitted an evil aura.
"Yeah, it is the end of the line...for you that is..." Izuku/Bullet said as he ran towards Ochako as he covered his arm in darkness and formed a quake bubble in hand.
Then Ochako starting running too and using One For All Full Cowling at IZUKU?!
"HAHAHAHA! You two finally got MAD! IF this is your strategy then it is pathetic." AFO said as the two got closer and closer the red boxes Izuku drop opened up and transported All For One in between Izuku/Bullet and Ochako's attack.
"NOW DETROIT SMASH!" Ochako yelled as she punched AFO in the gut.
While at the same time Izuku made his attack as the tremor bubble into a fast spiraling sphere of destruction in the palm of his hand and use the darkness to pull in All For One.
"ALRIGHT! TREMOR RASEGAN!" Izuku/Bullet yelled as the sphere entered AFO body which pretty much annihilates almost his entire body by the shockwaves.]
"COMBINE ATTACK! GRAVITATIONAL DEVASTATION!" Ochako and Izuku yelled at the same time.
"AHHH!" All For One's yelled out as his mouth's bleeds as he fell to the ground as Ochako and Izuku jumped away from AFO for a minute.
"They...They beat ALL FOR ONE!" a marine yelled out.
"DAMNIT! ARE THOSE PASTIFISTAS READY?!" Akainu yelled.
"Yes sir!" a Marine saluted as a dozen Pasifistas were ready as they were not destroyed in the crash.
"FIRE!" Akainu ordered.
As the pacifistas approached the two since the two are very tired from their battle.
"Crap I don't have enough energy to fight back and the adrenaline wore off," Izuku/Bullet thought
Then Akainu with magma at hand charged at Izuku/Bullet aiming to kill him.
But then...
CLASH!
As Izuku/Bullet opened his eyes there was a small blonde boy? Blocking the attack with a small sword.
"Who are you?" Ochako asked.
"The name is Melidoas. The Dragon Sin of Wrath." Melidoas said with an evil smirk.
"GGRRRROOAAANN!" a giant green pig roar?
"Wait I know that animal." A marine said in fear.
"What are they doing?!" a member of the Frezia force said
"IT'S THE SEVEN DEADLY SINS!" everyone yelled out in terror as each of the sins was front in the center of the battlefield.
Crew bounty unknown but combine amount would be 10 Billion
Melidoas Sin of Wrath Captain
Esconor Sin of Pride 2nd stongest
Ban Sin of Greed cook
King Sin of Sloth doctor
Gowther Sin of Lust spy
Diane Sin of Envy builder
Merlin Sin of Gluttony archeologist
"Well? Come fight us or retreat!" Melidoas said as he slashed at the ground to make a line between the sins and the marines.
"Grrrr... All Marines retreat..." Akainu said as he turned his back as he walked to an undamaged ship as many marines followed his example and many Freiza force ran for it but left their crew members except for their leader. As many heroes were arresting the leftover of the frezia force.
As all of this happens Izuku/Bullet did something unpredictable and so kind-hearted that the world was a shock to see.
"UNION TSUNAMI!" Izuku/Bullet yelled as the purple tsunami from before covered the entire battlefield and the damaged city except for his mech.
"NOW RECREATE!" Izuku/Bullet yelled again as the purple glow fades as the blocks receded to Izuku the city was rebuilt? As that happens Izuku/Bullet fainted due to using the last of his power.
"DEKU!" Ochako screamed as Izuku/Bullet's vision began to fade.
TO BE CONTINUE...