Chapter 166: Merged Overhaul
The twins prepares for a fight as Overhaul ranted about how heroes ruined everything for All for one and his comrades before telling the twins how their ancestor Vordemort Midoriya is similar to All for one himself, which caused the twins to chew to him out for his selfish goals before starting the fight with smokescreen. Overhaul then look around before preventing Charming from attacking him, causing Once-ler to get furious and attack Overhaul in his blind spot using her extreme strength, which also caused Overhaul to get bloodied up before Charming gets up to use air force. Soon, Overhaul and Charming clashed with each other until Charming himself gets weaken and beaten up from Overhaul's attack, causing him to chew him out for being a weakling before deciding to finish him off by using his quirk to blow him up. However, Once-ler stop him and uses one for all: GMA to get him away from Charming. She then uses zero satellites to throw stuff at Overhaul, which caused him to try to dodge them until he finally got hit as she quickly takes out a first aid kit to tend her brother's wounds.
After she put bandages on Charming's wounds, Overhaul got furious and summoned Rikya to the battlefield before merging himself with him much to the twins' shock. Overhaul then gets bigger as the agency crumbles to the ground as he says that he'll take Charming out first since he's weak, causing all the heroes to come to the twins' aid, but got told to stay back by Once-ler, who then say that she'll handle Overhaul. While Overhaul explain the vision of All for one's kingdom to the heroes, Charming starts monologuing that throughout his whole life, he thought that brains are better than brawn, but now that he's been overpowered and outsmarted by villains, he's starting to question himself as a hero that will live up the Midoriya name. Soon, Beanstalk went to Once-ler and say that she'll help her, causing Once-ler herself to get an idea and use super support bond+ and told Beanstalk to protect their comrades and associates.
After Once-ler becomes a giant, Overhaul becomes shocked and told Once-ler that she truly is a Midoriya before launching himself to start the fight. Once-ler then clashed with Overhaul as the hero council and Beanstalk gets everyone away from her feet before using mega moves on Overhaul, which caused Overhaul himself to get blasted away so she'll snap Charming back to his sense so he'll help her fight. Charming then uses use support bond on his sister, which caused her to be strong enough to push Overhaul away before using an uppercut to flip him over. After using one for all: drill jump and made the ground shakes with a booming sound when Once-ler lands, Charming quickly tell his comrades and the Heroic Hamsters to distract Overhaul so Once-ler can attack his blind spots. He then analyzed Overhaul's appearance before telling Once-ler to go now, causing Once-ler herself to attack Overhaul's blind spots before using Texas smash, which also caused Overhaul to get send flying again before getting more furious.