Eustass Kid and Trafalgar Law against Big Mom: who won the fight?
Eustass Kid and Trafalgar Law against Big Mom: who won the fight?

It is known that Big Mom is probably the strongest female character in One Piece of all time. The former emperor of the sea was incredibly strong, and only a few could match her powers and abilities in the franchise. On the other hand, Eustass Kid and Trafalgar D. Water Law are two of the most formidable members of One Piece's "Worst Generation." Big Mom faced Kid and Law in the Wano Country Arc, and in this article, we will explain how the battle unfolded and who won.
Ultimately, Eustass Kid and Trafalgar D. Water Law managed to defeat Big Mom in Wano Country, ending her Yonko reign; this was also coupled with Kaidou's defeat at the hands of Monkey D. Luffy, as both fell into Wano's magma chamber. It is currently unknown whether the two powerful pirate captains survived.
The rest of this article will expand on the answer given above, as we'll provide more details about the fight between Big Mom on one side and Eustass Kid and Trafalgar D. Water Law on the other. It was an epic battle in Wano Country and one of the best in the entire series, so we'll be providing a full recap, which also means there will be some spoilers we must warn you about.
Eustass Kid and Trafalgar D. Water Law have managed to defeat Big Mom...
The battle between the two powerful captains of the "Worst Generation" and one of the most powerful Yonko was epic and one of the most important in the series. Namely, as soon as Big Mom's friends were taken away, Kid began attacking her with his Punk Pistol, but the Yonko responded by landing a good punch in the face. Kid tried to stop him, grabbed the Yonko's arm while smiling at her, and used his Repel to launch Big Mom into the air. Law then used his Tact to throw a boulder at the Yonko, knocking her into the river.
After Big Mom is rescued by Prometheus shortly after, he gets up and decides to go fight her with Killer. He then heads to the edge of the Onigashima Skull roof, where Big Mom collapses with a massive pile of metal behind her and informs the other Supernovae that their intention was to split the two emperors, which he believes has been accomplished.
He is then puzzled by the peculiar shape of the clouds above the levitating island. Kid is puzzled as to how Big Mom can fly when Zeus was captured upon his return to flight. He then blocks Big Mom's initial strike, but is hit by a second blast from Fulgora, which causes both Supernovae to be projected onto the second floor of the fortress.

They encounter Basil Hawkins, who attacks them after noticing that Big Mom doesn't appear to be pursuing them. The two comrades dodge the attack and accuse Hawkins of betraying them. After a brief discussion, Killer decides to stay and fight Hawkins while Kid pursues Big Mom. Upon arriving, he thwarts a Yonko attack targeting Nami, Usopp, and Tama.
Kid then tells the Straw Hats that it is up to him to defeat Big Mom by using his metal arm to slam her head into the ground. Law suddenly appears and, despite Kid's resistance, offers him a partnership in the fight against Big Mom. Kid and Law decide to unleash their awakened Devil Fruit abilities against the Emperor out of necessity after enduring Big Mom's Mother Raid and Ikoku strikes.
Law deploys a barrier called ROOM around his sword as Big Mom throws Kid towards the music hall, allowing him to pierce Big Mom's body and unleash a shockwave that kills the emperor. Kid then uses his newly discovered ability to turn Big Mom into a magnet, pulling a significant portion of the fortress towards her and crushing it from all sides.
Yet, this wasn't enough to kill Big Mom. Now truly enraged, the Emperor fashioned new Homies from the steel beams that had previously crushed her, using the souls of several of Kaido's minions to power his unique Homies. Big Mom challenged the Worst Generation Pirates to try to take her down after realizing Kid and Law's strength and giving up a year of her own life to become bigger and more powerful.
Kid vowed to overthrow the Emperor at all costs, unfazed by Big Mom's new appearance. Then Big Mom regained the upper hand, defeating them while mocking their crew's cries for their lives. Big Mom headed to the rooftop after punishing their crews for begging her and declaring their quarrel over.
However, this would give Law the upper hand as he was still alive and took advantage of his ascent to the roof to cover Kikoku with K-Room and stab her right arm right up to her face. Then, stating that she wouldn't have been able to escape this attack unscathed, he unleashed Shock Wille on her once more. They were attached to Kid, who also got up, just as his new steel buddies were about to assault him.
He confidently warned Big Mom that nothing was safe from danger before charging Big Mom with Punk Corna Dio and smashing her against a wall after absorbing both the homies and the surrounding metal. The two then reiterated to Big Mom that they would prevent her from reaching the roof, even if they perished in the fight. Big Mom gathers Napoleon, Hera, and Prometheus into a sword engulfed in flames and lightning and uses it to slice her metal bull, but Kid says it's useless. Big Mom is back at full power.

The Empress laughs, declaring that they are useless and must abandon their individual goals. Meanwhile, Kid jumps on Big Mom, gives her one magnetic pole, and places the other on a wall. The pirate remains stuck to the wall, and when Kid comes charging at her with his metal bull, she turns to face the wall and uses it as a shield.
Kid is surprised, and the Empress quickly attacks the opponent, Misery, drawing a female figure made of flames and lightning from her sword. Law, meanwhile, levitates a tower above her, uses it to knock her to the ground, and then uses his sword to stab her in the chest. Law doesn't let go of the blade and continues to extend it; he then emits an even more deadly shockwave that severely injures the Empress. Linlin continuously strikes him with her Haki-covered hands.
Despite the severe damage, Big Mom unleashes Misery against Law, requiring Kid's help. Kid reiterates that he does not accept orders, then launches a giant electromagnetic cannon, whose powerful energy beam directly strikes the opponent. As she endures the attacks, Big Mom offers her opponents a choice: give her fifty years of life or become her slaves.
She then begins to siphon the life force from Kaido's men, but the two Supernovae, who are not afraid of her, are immune to this tactic. Later, she observes Law locking the latter in an R-ROOM, which muffles all sounds she makes and prevents her from using her abilities. Kid then scolds Big Mom, saying that she will be sent to hell because he never gives up, and he hits her once more with his electromagnetic cannon, knocking her to the ground. She then falls, followed by the bombs from the arsenal, and hears Kid and Law's minions rejoicing in their victory against the Empress.
…but we don’t know if she’s gone for good!
Along with Kaidou, Big Mom fell into the magma crater in Wano Country, and shortly afterward, a large but silent explosion was observed, implying that the two defeated emperors perished there. Members of Big Mom's Pirates were unable to confirm whether she survived, while other pirates could later be heard stating that they had heard that Big Mom had died in Wano Country. Officially, however, her status is unknown, and knowing her power, we wouldn't bet on a definite answer now.