Katsuki Bakugo vs. All For One is a fight during the Final War between Great Explosion Murder God Dynamight and All For One.
Prologue#
During his fight against "Tomura Shigaraki", Dynamight suffered a lethal blow from the Villain. Not wanting to let his light die, Edgeshot used his Ultimate Move, Thousand Sheet Pierce: Zenith, to enter Dynamight's body and repair the damage done to him on the inside.
The Hero was able to sew up the trainee's innards, but his heart wouldn't start, even after forcibly trying to restart it. Edgeshot's lifeforce was draining the more he stayed in his current state, and at the point beyond his limits, while wavering his life against Dynamight's, a single bead of sweat had rushed through the young hero's bloodstream, produced just before his death. Using the bead of sweat, Edgeshot was able to jump-start Dynamight's heart and successfully brought him back from the brink of death.[1]
While Dynamight was out of commission, All Might had gone off to battle All For One, who was currently rewound to a child due to taking a reverse-engineered Quirk-Destroying Drug, and the various battles he engaged in afterwards. Despite a hard-fought battle thanks to his Armor, All Might failed to stop All For One from making his way to U.A.. All For One tried to Warp Tomura to him, but the Villain fought back, leaving him to deal with All Might before taking care of Tomura. Carrying his Quirkless body, All For One flew to U.A. to kill the Symbol of Peace right in front of the entire viewing world.[2]
All Might tried using his final attachment from his armor, but All For One stopped him before he could activate it, using the newly acquired Bloodcurdle to paralyze the former Number One Hero. Just as Gentle was able to secure the floating U.A. from falling out of the sky, All For One blasted a hole in the floating school to keep the reformed Villain occupied. The pilots of the X-66 jets try to fire at All For One, but he shoots them down with ease. Deku, who was currently dealing with Tomura and unable to save All Might, calls out to his mentor, but just as All For One is about to tear him apart, Dynamight awakens, rushes onto the edge of U.A., and locks eyes with Deku.[3]
The duo immediately work together to save their Hero, with Dynamight blasting his way towards Deku with his Explosion Quirk, and the current wielder of One For All using Gearshift to increase Dynamight's speed as he rockets towards All Might. As the world watches and prays for a miracle to happen, Dynamight successfully saves All Might's life, blasting away All For One's hands in the process.[4]
The two of them land on top of a building away from All For One, as Edgeshot forces Dynamight to expel some pooled-up blood and slither out of his body. Unable to recover himself from his Zenith state, he tells Dynamight that while he was able to mend his body, every breath he takes will be hellish agony until he can get proper treatment. When Dynamight thanks his senpai, Edgeshot assures him that it was his own power that brought him back.
All Might tells Dynamight that the young man who almost killed him was All For One, and noticing that his right arm had been destroyed during his rescue, asks him to offer up his hand. He gives Dynamight the last attachment of the Armored All Might, dubbed the "Great Explosion Murder God Dynamight". Even though it can't do its original function, it can still act as a brace for his busted-up arm. All Might wishes he could give him more, but Dynamight simply gives him a smile and rushes in to finish off All For One.[5]
Battle#
All For One is seething with rage at Dynamight's rescue, but is able to pull himself together and focus on Tomura and taking back One For All and his brother. He knows he needs an uncompromised hijacking of Tomura's powerful will, and he'll have to grant him his own Quirk and himself. He wishes that the vestige inside of Tomura could have taken back control, as he realizes how many things have gone wrong, and how people beneath him were able to constantly stand up against him.
Before All For One can make a move, Dynamight shows up and tells All For One that he's the final boss. As he takes an explosion to the face, All For One gets sudden flashes of the Second User of One For All, before being blasted down to the ground, as Dynamight vows to finish the job that One For All couldn't.[5]
Back on top of the building, All Might looks in awe at the speed Dynamight had just demonstrated. Edgeshot tells him that when facing death, Dynamight was briefly able to take a stand against Tomura, and that he's on the verge of grasping something essential. Dynamight knows in order to take down All For One for good, he needs to make use of this "side effect".
Despite the damage taken, All For One is still fixated on Tomura and tells Dynamight he will come for him later. As Tomura and Deku continue their battle, All For One makes his way towards the duo, ignoring Dynamight. He notes that Endeavor and Dark Shadow caused much more damage to his body, and he hardly measures up to All Might, so he isn't worth wasting more of his time in his rewinding state. To him, their fates are not intertwined, and Dynamight just a pebble in his path.
However, at this time, Dynamight takes note of the pain in his body. As the beads of sweat are stored up in his palms, they now also shoot through his whole body, and the pain from when and where they explode from is giving him a handle on the timing of his backup blasts. Dynamight is able to use Explosive Speed: Cluster to catch up to All For One, leaving the Villain flabbergasted. However, the young Hero is moving too fast and can't control his speed as he tumbles on the ground.
All For One is confused by this, as Dynamight thinks back to his moments before death, when he asked if he could catch up to Izuku. Now, Dynamight feels like he can overtake him, as he begins charging another blast for All For One. Over at the U.A. shelter, the civilians watch as the battle unfolds: Masaru can't bear to watch, given who his son is up against, but Mitsuki tells him he has to watch, as their boy is grinning like he always does.
Right before taking the explosion, All For One is baffled by why this insignificant pebble vexes him more than even All Might did. He remembers back when he killed the Second User, and realizes the striking resemblance, and recognizes who is really at the core of everything he hates and who he truly loathes above all others.
Dynamight launches a powerful blast at All For One, sending the Villain smashing against a building as the Hero is launched backwards. All For One screams that "Kudo" is the one to blame for it all. Dynamight thinks the Villain has gone senile and is referring to him, retorting by asking All For One if he's finally lost his mind and declaring that his name is "Kacchan Bakugo".[6]
All For One notes that he had made sure that Kudo's bloodline ended with him, leaving nothing to chance, even killing any woman or child close to him. Even if his bloodline still ran through Dynamight's veins, All For One still should have recognized him back during their first meeting. All For One then realizes that it's the look in his eyes that he recognizes. Dynamight only had a resemblance back then, but All For One is convinced now that a willful resolve resembling Kudo's has crossed time and space to thwart him.
Dynamight keeps himself in the air with explosions as All For One assesses the situation. He knows that forcibly Warping him away won't stop him, since the only available warp points are All Might and Tomura, who are both too close. He also knows he can't drag this battle out much longer before he rewinds faster, and even when he does reach Tomura, conflict would be inevitable, as he's already been rejected once. He initially thought he had to save his strength for Tomura, but he has had enough of all of this.
He decides to kill two birds with one stone, as killing Dynamight and executing his transfer are now one and the same goal, and begins to summon his last-ditch effort. Within One For All, Yoichi can sense his brother coming, as All For One uses his Ultimate Move, Omni-Factor Unleash: All For One Goal. By combining every Quirk he has stored up, All For One is able to propel himself at full throttle towards his final goal.
All Might and Edgeshot look on and realize this will revert him back to a baby, and he's betting everything on this single burst. All Might yells for Dynamight to get out of the way before getting blown away as All For One speeds through like a bullet. Dynamight, while still grinning, asks himself how he can ever hope to beat this thing.[7]
For a brief moment, Katsuki thinks back on different points in his life: when he and Izuku became proper rivals, when he told Endeavor he wanted to find out what he couldn't do with his Quirk, and finally, when he bullied Izuku. He promises that he won't stand in his rival's way anymore and prepares himself for the final stand against All For One.
As the giant mass charges straight forward, Dynamight stands his ground and tells All For One to blow the hell up. Just as he says it, multiple explosions suddenly erupt inside the Villain's mouth, blowing his head up and throwing the Villain completely off guard, changing his speed and stopping him from rushing through.
Dynamight says that the rain hinders his power, so he fired off some coated beads of sweat during his blasts without triggering them, hoping that something could set them off on delay. Dynamight tells All For One that the one Quirk he has right now is more than enough, and rushes in to finish the rewinding Villain off.
The blast threw All For One's powers into disarray, but the Villain tries pulling himself together to unleash them once more. He shouts that this is his story and tells the "extra nobody" in front of him to move aside. Dynamight charges at him with a Cluster-powered Howitzer Impact combined with AP Machine-Gun directly in the face. He goes on to unleash a full barrage of blasts at All For One, refusing to give the Villain a break. As he unleashes powerful blast after powerful blast, he tells All For One to shut the hell up.
Inside All For One's vestige world, he realizes that his Quirk Factors aren't mingling properly, and is baffled at how the explosions are interfering with them, wondering if his body being too young is the problem. The vestiges show up, and the one of Hawks tells him his negative emotions are causing him to lose control over the factors. The Vestige of Hawks also says that he knows that All For One's Vestige had been swallowed up by Tomura.
Dynamight unleashes the final blow against the real All For One, destroying All Might's gauntlet in the process. He tells All For One that this is their story, not his, as he gives the Villain one final point-blank blast to the face that causes him to crash straight into the ground. Within One For All, Yoichi silently laments his brother's fall. All Might and Katsuki's parents all look in awe as the cultivated damage everyone gave against All For One had finally paid off. Dynamight says that he never could have hoped to beat All For One alone.[8]
All For One had been reduced to an infant, crawling desperately to find Tomura and transfer his Quirk to him. He knows his other self has been suppressed before he could use his last-ditch tactic, but he can still empower him to take back control of Tomura's body and mind. He thinks without Yoichi, it's all for naught, and that he thwarts others' futures so that he can have all eyes on him forever.
While the infant All For One continues to crawl, Dynamight lands right in his way, surprised he hasn't vanished yet. Dynamight coughs up more blood as his body has run out of the strength to even stand. All For One cries for him to get out of his way, unable to even talk anymore. With the great evil finally on the verge of birth/death, the young Hero knows he's done enough and that he can let the baby disappear without his help.
As he's about to fall over, however, he remembers the words he gave to Eijiro before he created Unbreakable, about how being able to keep standing through anything makes him strong. The wounded Hero stops his fall and smiles, as he'll achieve nothing less than absolute victory.
All For One lets his emotions take over and launches a Spearlike Bone out of his mouth towards Dynamight. The infant Villain smiles as he thinks he landed the blow; however, it is revealed that Dynamight merely caught the attack with his teeth and breaks it apart with one last explosion before spitting out the tip. The baby in front of him finally begins to rewind into nothing, crying out to stop the process.
The Vestiges inside All For One begin to fade away as well. Hawks' Vestige thinks the stolen factors returning to their owners would be a nice bonus, but knows that's not how it works, fading away as All For One is reduced to an embryo, to a zygote, and then nothing, leaving not a trace of the ultimate evil left.
Dynamight tries to imitate the same victory pose All Might pulled after his fight in Kamino, but falls on the ground before he can do that. Before he can fall into unconsciousness, Katsuki raises his working arm up into the air and tells Izuku to give his opponent hell.[9]
Aftermath#
As the final battle against Tomura Shigaraki continued, Eraser Head and Present Mic had momentarily brought Kurogiri to their side, warping every other available Hero to the final battle against "All For One" after his Vestige took back control over Tomura's body.
Despite not being warped there himself, Dynamight was able to blast himself all the way over to Mt. Fuji. In the nick of time, he was able to save Deku from Kurogiri after the latter blocked the former's path to "All For One", with Shoto helping out by creating an ice ramp for some extra height. After blasting the Warping Villain away, he tells Izuku not to let him surpass him, as Deku delivers one final punch against Tomura's body, destroying it and parting away the storm clouds, ending the Final War for good. [10]