Was it ever confirmed that Shanks was the only Yonkou without a devil fruit? I actually think it might be interesting if Oda subverts all our expectations and Blackbeard/Whitebeard are the only Yonkou
with devil fruit powers.
I don't think this is likely, but if Kaidou does posess a zoan fruit, as others have said, why not try to drown yourself? Maybe he has and that can't even kill him though, which would be interesting.
Well Law's plan was to defeat Doffy as a way to beat Kaido, right? So that has to be related somehow. Getting rid of Doffy/Smile is somehow a plan to defeat Kaido.
no Law originally wanted to destroy the SMILE factory so that Kaidou would come after Doflamingo and they would hopefully take each other out. Luffy wanted to fight Mingo himself though, so the plan got derailed.
although according to the last panel of this chapter they still may have been successful if Kaidou really does intend to attack Mingo.
I'm taking a guess here but considering Kaidou has been beaten before, Whiteboard was probably one of them and I'm guessing that WB was the closest to killing him. I think Kaidou was probably angry that he can't fight WB any more.
As for Kaidou being hard to kill, I'm thinking that his "toughest person alive" is not the same as WB's "Strongest man alive". For WB, it mean no one can beat him, we already know Kaidou can be beaten. I think for Kaidou it's just his inability to be killed, he has raw physical toughness that is unmatched but I'd imagine a superior opponent can still knock him out or beat him into a pulp, just not kill him.
Whitebeard was the sword, Kaido is the shield.
this actually clears up a point of confusion I was having. Why would they call Whitebeard the strongest man in the world if Kaidou was around? It makes total sense that Kaido is considered insanely strong because he can't die. Like Sol said, he's a shield.
