In my opinion, this is something that is all but confirmed. Yet people will still fight me on this simply because they doubt Koby. Does it sound impossible for someone like Koby to ever capture Luffy? Yes, but that's literally the point. For a marine like Koby, capturing the pirate king is a dream as big as Luffy's own dream to become pirate king. Wasn't Luffy's dream also impossible at the beginning? But here we are with Luffy being one of the most overpowered characters in the series.
The evidence:
In chapter 7, Luffy helps Koby to get into the marines. The chapter ends with a narration box that says this(official translation):
This serious mistake has to be a reference to helping Koby join the marines. There is nothing else it could be a reference to. You could argue that it refers to Luffy and Zoro becoming pirates, but it makes absolutely no sense to refer to that as a mistake. Luffy's going to be pirate king, Zoro's going to be WSSM. So what is this mistake referring to?
Well this is heavily hinted at in chapter 433 when Luffy meets Koby after enies lobby.
Koby:
Then Koby confesses his dream of becoming an admiral, before becoming extremely embarrassed for spouting such a lofty goal. To which Luffy responds
Luffy:
At the end of their final exchange in the arc, Luffy says these words
Luffy:
What this basically confirms is that EoS Koby will be strong enough to fight and capture Luffy. The narration box doesn't lie, we were told by Oda that Luffy made a mistake helping Koby become a marine. Then when Koby says he will one day capture Luffy, Luffy himself expresses that he has faith that Koby can achieve his dream. Yet Koby doubters refuse to have faith in him even when both Luffy and Zoro do. Half of the fans here probably don't even think Koby can become an admiral during the main series, and that rather, he will become an admiral in the epilogue or something. Nonesense! Koby is going to get off-screen haki blooms, he is going to master advanced haki, and he is going to become strong enough to challenge Luffy. Luffy believes it, Zoro believes it, the damn narration almost spells it out for you. Its time to start having a little more faith in Koby.
The evidence:
In chapter 7, Luffy helps Koby to get into the marines. The chapter ends with a narration box that says this(official translation):
This serious mistake has to be a reference to helping Koby join the marines. There is nothing else it could be a reference to. You could argue that it refers to Luffy and Zoro becoming pirates, but it makes absolutely no sense to refer to that as a mistake. Luffy's going to be pirate king, Zoro's going to be WSSM. So what is this mistake referring to?
Well this is heavily hinted at in chapter 433 when Luffy meets Koby after enies lobby.
Koby:
Then Koby confesses his dream of becoming an admiral, before becoming extremely embarrassed for spouting such a lofty goal. To which Luffy responds
Luffy:
At the end of their final exchange in the arc, Luffy says these words
Luffy:
What this basically confirms is that EoS Koby will be strong enough to fight and capture Luffy. The narration box doesn't lie, we were told by Oda that Luffy made a mistake helping Koby become a marine. Then when Koby says he will one day capture Luffy, Luffy himself expresses that he has faith that Koby can achieve his dream. Yet Koby doubters refuse to have faith in him even when both Luffy and Zoro do. Half of the fans here probably don't even think Koby can become an admiral during the main series, and that rather, he will become an admiral in the epilogue or something. Nonesense! Koby is going to get off-screen haki blooms, he is going to master advanced haki, and he is going to become strong enough to challenge Luffy. Luffy believes it, Zoro believes it, the damn narration almost spells it out for you. Its time to start having a little more faith in Koby.
