Although he did fight Kaido and even managed to earn his praise, which is quite impressive, it was pretty clear that Zoro wasn't anywhere close to him in terms of either power or skill. That in itself is a big reason why Zoro would never have killed Kaido. For now, Zoro is levels below his Captain, Monkey D.
In my opinion i think that luffy will not defeat kaido but ZORO will. I dont know why but from the start of the fight i believed that zoro will defeat him,it sounds more right to me. Just like ryuma killed the dragon,Zoro will defeat Kaido.
During the Wano Country arc, Zoro received a major powerup in the form of Enma, Oden's prized sword. The sword is capable of drawing out an individual's Haki. With the help of the sword, Zoro managed to leave a mark on Kaido's durable skin.
He's also trained his conqueror's haki with Rayleigh, too. But then Zoro, out of nowhere, cuts Kaido with advanced conqueror's haki, and then uses that to defeat King, too.
Enma. Enma is also one of the 21 Great Grade (O Wazamono) swords wielded by Zoro in One Piece. It was wielded by the fabled character Kozuki Oden, and he even cut Kaido with this very blade. The Enma was handed over to his daughter Kozuki Hiyori, who then passed it to Zoro as compensation for the Shusui.
Because the moment Kaido saw Zoro's Kiki Kyūtōryū: Asura, Kaido knew that it was Advanced Conqueror's Haki and since he already saw Luffy and Kid use basic Conqueror's Haki, Kaido was pretty much awestruck that even Zoro could use it.
It is a known fact that Kaido has lost to his fellow Yonko and the Navy a combined 7 times and been captured a total of 18 times. While Kaido might be the strongest in terms of raw strength, there are definitely those who can beat him a fight.
3 Characters Who Could Never Defeat Kaido
Mihawk is incredibly powerful and the fact that he's conquered the throne of the swordsmen proves that. However, defeating Kaido is a completely different challenge for Mihawk. Kaido is a Yonko, and they're all monsters that Mihawk will inevitably struggle against.
2) Jack. Again, by the process of elimination, Zoro would easily win this fight. He has already defeated King in One Piece Chapter 1036. This was a man who didn't even consider Jack to be on his level.
Until Sanji becomes an ACoC Haki user, he unfortunately, has almost no chance of defeating Kaido. Luffy wasn't even able to meaningfully damage Kaido until unlocking his ACoC Haki, emphasis on meaningfully.
In the manga and anime series "One Piece," Monkey D. Luffy is the main protagonist and captain of the Straw Hat Pirates. Yes he is. He won their final clash and overpowered Kaido's strongest attack with his strongest attack.
1 Almost Nothing Could Penetrate Kaido's Skin
Aside from advanced Haki, the only thing capable of harming Kaido is a world-class swordsman and equally renowned blade. This was seen from his clashes with Zoro and Oden, both whom he admired for their unusually high strength.
4 CAN'T BEAT: Boa Hancock
At the moment, her real power level is still unknown, but it seems quite obvious that she's a special character. Boa had no trouble fighting against the Pacifista and Smoker at Marineford.
Zoro can 100% outlast Law (Zoro's stamina is insane), but Law can totally cause a stalemate once Zoro gets lost lol. Jozu and 4 other One Piece characters who Law can certainly beat 5) Jozu Law's Devil Fruit powers spell doom even for Jozu's diamond-hard body (Image via Eiichiro Oda/Shueisha, One Piece)...
Shanks is probably way above Zoro`s level. Of all the characters still alive in One Piece, Dracule Mihawk is undoubtedly the strongest swordsman in the world. After all, he holds the title. Vista was the commander of the fifth division of Whitebeard`s Pirates and was considered the best swordsman in Whitebeard`s crew.
Mihawk is said to be close to the same level as Shanks and is even dubbed as the greatest swordsman, so to say Luffy would defeat Mihawk is still debatable in the eyes of many fans.
Eclipsing Zoro in both mastery of Armament and Conqueror's Haki, Luffy proves himself stronger than Zoro overall. While Zoro does edge out a victory in terms of strength and physical endurance, Armament and Conqueror's Haki are undoubtedly the two more relevant factors here.
The Goro Goro no Mi has a tremendous power output capable of easily hurting some of the strongest characters such as Zoro and Sanji. The Goro Goro no Mi's attacks can penetrate Kaido's body without doing any external damage, making it quite useful against him.
In the end, it was not just Luffy's awakening form that single-handedly wiped off Kaido in the battle. Still, the Ryuo technique and Luffy's handiness of Haki also played a vital role in the Yonko's defeat. In the battle, Luffy's Gear 5 transformation was just Kaido's final nail in the coffin.
Garp may be old right now, however, he is still more than capable of taking on Shanks in battle. This is evident from the fact that he recently set out to fight not just Blackbeard, but his entire crew on his own so as to rescue Koby from the grasp of the Yonko.
Big mom and blackbeard. he can beat those two yonko for sure. His power and haki and stamina are way too strong for these two yonkos. Shanks and kaido are on another level of power.
The Wanokuni arc of One Piece gave Zoro the spotlight he deserved but fans were more gravitated toward his scenes with Hiyori. It wouldn't surprise fans if Hiyori reveals her feelings for Zoro, her savior. They shared intimate moments and Zoro might even find a sense of belongingness when he's with her.
Admittedly, Zoro's maximum power output when he goes all-out combining Nine Sword Style and King of Hell Style should grant him a Yonko-level peak. Zoro can infuse his attacks with Conqueror's Haki, a feat that, going by Kaido's statement, directly puts him among the strongest characters.
Luffy – Zoro's Best Friend
Luffy, the fearless captain of the Straw Hat Pirates. Luffy and Zoro's friendship epitomizes an unbreakable bond forged through countless trials, battles, and adventures.