Board Thread:Questions and Answers/@comment-26005711-20160801115505/@comment-25814498-20160803163842

I thought so too, but my point is that Tiger Bite Fist seems to be the only technique that could return any significant amount of debt to knuckle; this isn't Youpi after all. As such, unless he unveiled True Tiger Bite Fist and came at Knuckle from two different angles, I don't think he would be able to land such a hit on him, what with the attack being so blatantly obvious. If that were the case, however, Kastro would immediately reveal his Doppelganger ability and lose the element of surprise that allowed him to land so many attacks on Hisoka. On another note, there's the difference in experience between the two, and their fighting techniques. You may call Knuckle a straight forwards fighter, and while I don't deny this, let's not ignore the fact that he's been in more that 5000 battles and was trained by Morel. The former point is fairly obvious, but the latter is important because it would give Knuckle experience in fighting manipulators, especially those manipulating humanoid constructs.

Finally, I'll hark back to the point I made earlier about Kastro's clone. As Pouf mentioned during the Palace Invasion, Nen puppets are almost never as strong as their manipulators. If we were are to go by your assumption that APR would be applied to the puppet and not Kastro himself, this would be the best case scenario for Knuckle. As we saw in Hisoka's fight, Kastro is much more inclined to send his double into attack rather than risk harm to himself. If Knuckle were to land a hit on his double, activating APR, I believe one of two things would happen; Kastro would either de-conjure his Double or use his double to attack even more, over fear of having APR being applied to him. Once again, after seeing how he acted in the Hisoka fight, I don't believe that Kastro would put himself at risk with no prior knowledge of Knuckles ability.

With the Double attacking overtime without any assistance from Kastro himself, it would only be a matter of time before it went Bankrupt, leaving it completely defenceless and Kastro with only half of his Hatsu's. This would happen even faster what with the Double being less powerful that Kastro himself. How would the battle play out from that point onwards? Honestly, I don't know. But what I do know is that it wouldn't be as straightforward as "Kastro wins, case closed". It all depends on how their Hatsu's would react to each other and how they themselves would react to each other; but going by the evidence, one of them was much less composed when faced with certain death, and composure may be what turns the tide in battle.