In the My Hero Academia manga and anime series, it is revealed that Izuku Midoriya's quirk was not stolen by his doctor.
the one that all for one secretly gave him on the day that he dropped him off at his family home actually belonged to Deku Deku was the original owner of Decay. but it was stolen from him when he was just a baby.
8 Nine Aftermath: OFA Users Transfer Quirk Back To Deku
All Might finds the weakened Deku and Bakugo and discovers that although the embers of Deku's quirk went out, OFA still miraculously managed to find its way back to Deku, leaving Bakugo with no recollection of what happened.
After reading a few official theories about Deku having a quirk before, many canon claims said that the Doctor himself was the person who STOLE Deku's original quirk, which could've been Fire Breath or something like that.
Izuku's quirk, One For All, can stockpile one's power, increasing the user's physical capabilities and being transferred from one person to another.
Garaki specifically stole Deku's quirk from him as a child because of its impressive potential, it's also likely that same quirk could've been the ability that All For One chose to pass down to his quirkless successor, Shigaraki.
Deku's final quirk is known as 'gearshift'. It's a quirk that is activated via physical contact. It allows the user to change the velocity of anything they touch, meaning they can spontaneously slow things down, or speed things up.
As of now, Deku has access to seven Quirks, namely One For All, Transmission, Fa Jin, Danger Sense, Blackwhip, Smokescreen, and Float. The basic gist of all these powers is that they all come from the previous One For All users, with their abilities becoming stronger throughout the generations.
The man that would be known as Nine was born with a Quirk that allowed him to control and manipulate the weather around him. His Quirk was immensely powerful and was viewed as a god-like ability. At the same time though, Nine was one of the many who felt outcasted in society and believed that it should not be this way.
when creating the bullets in the first place Dr. garaki was then able to get a version of Aries Quirk from this that couldn't be turned off and all for one took this to make sure that no matter what he reaches shigaraki's Battlefield where he can then do something to save himself.
During the USJ Attack, Deku is betrayed by his Classmates and Teachers (Except for Aizawa, Kirishima, Tokoyami, Koda and Shoji) and they leave him there to die and is eventually killed by the Nomu, but what happens when a Certain League of Assassins find his body and Revive him, what happens when they train him to the. ...
Bakugo is the only student who knows Deku's secret which puts him in a unique position to protect Deku.
Transformation-type quirks can also be classified as a hybrid quirk. As it uses activation and mutant-shape characteristics and is also known as the least common type of quirk.
All Might wasn't born with his power. He was given a unique quirk called One For All, which can be passed from one person to another and becomes more powerful with each new possessor.
According to the events of My Hero Academia so far, Deku grew up without a Quirk. He was given the OFA Quirk when he met All Might. The series does give an explanation for why Deku was deemed Quirkless.
Before he died, En plucked some of his hair and gave it to Nana Shimura, so that she could inherit One For All.
Izuku Midoriya's strongest Quirk is, without a doubt, the One For All. This Quirk first belonged to All For One's brother, Yoichi. After him, there have been eight more users of these powers. All Might, the eighth user of One For All, passed it down to Izuku Midoriya, making him the 9th and the final user.
After observing how the quirk reacted to the bodies of the users, all the previous wielders concluded that One For All could not be held by a user who already had a quirk. Thus, Deku is the last successor to the quirk, making him their last hope to take All For One down.
1) One For All: Full Cowl - 100% The biggest issue with the OFA Quirk is that it takes a major toll on the body. With Eri by his side, Deku bypasses this restriction.
Dr. Kyudai Garaki, also better known by his villainous alias Daruma Ujiko, is a major antagonist in the manga/anime series My Hero Academia.
Deku appears as a mass murderer in My Hero Academia: World Heroes' Mission.
One For All offers immense durability, and a variety of other useful abilities, but none of them are as overpowered as Overhaul. With this Quirk, all Kai has to do is touch the current wielder, and their body will be blown apart instantly, and One For All will be destroyed as well.