A third plotline could be that Izuku has to fight All for One not just physically, but also in a battle of wits. All for One is a very cunning adversary, and Izuku would need to outsmart him. This could involve Izuku using misdirection, setting traps, and predicting All for One's moves in order to gain the upper hand.
Bakugo is a likely candidate. Despite their rocky relationship in the beginning, Bakugo has come to respect Izuku's growth and strength. In a fight against All for One, Bakugo's powerful quirk and combat skills would be a great asset.
One interesting plot development could be Izuku unlocking a new power during the fight. This new power gives him an edge and surprises All for One.
Well, one possible plotline could be Izuku's struggle to control the sudden influx of power from One For All at an earlier stage than in the original story. He might face challenges in keeping it a secret from his classmates and teachers, adding a layer of secrecy and tension.
Well, one interesting plot point could be Izuku unlocking a new power specifically to counter All for One. Maybe it's a hidden aspect of One for All that he discovers during the intense battle.
One interesting fanfiction could be where Izuku uses the combination of All for One and One for All in unique ways to defeat powerful villains. He might use All for One to take away the quirks of enemies and then use One for All to enhance his physical abilities to an even greater extent than normal.
One interesting izuku all for one fanfiction could be where Izuku uses the All for One power in unexpected ways to save his friends. For example, he might use it to transfer quirks temporarily to those in need during a battle, creating unique and exciting fight scenes.
One interesting story could be about Izuku exploring new powers of One For All in a different dimension. He might face challenges that test his limits and how he uses the power in unique ways.
One possible supporting character could be Bakugo. He might be initially reluctant to help Izuku but then realizes the importance of the fight against All for One and joins in. His explosive powers could be a great addition to the battle.
One possible plotline could be Izuku having superhuman abilities that are not like the normal quirks in the original story. For example, he might have the ability to manipulate time or space in ways that are completely unheard of in the My Hero Academia universe. This could lead to him being both feared and revered by others.
One possible plotline could be Izuku using his knowledge of Pokemon to help him in his hero training. For example, he might study how Pokemon use their unique abilities and apply similar strategies in combat against villains.