Board Thread:Questions and Answers/@comment-26005711-20160801115505/@comment-17259909-20160804011529

Has Knuckle ever been able to land Hakoware on an opponent without aid, except for Gon? I know it's unfair to ask such a question because most of his seen opponents were Ants, who were OP, but I feel that Knuckle's biggest weakness is that the activation condition is difficult to satisfy.

The way I see the battle going begins with Knuckle trying to land a punch on Kastro to activate APR. Kastro will use the double to launch sneak attacks, managing to hit Knuckle once or twice. By now, Knuckle will be alerted to a "phantom limb" hitting him. I'm not sure if he would be as perceptive as Hisoka as to deduce that Kastro is using a double, but he will be aware that Kastro has some trick. Kastro will take the initiative to launch attacks with Tiger Bite Fist. Knuckle, not knowing what Kastro is up to will dodge the attacks to avoid getting hit by the sneak attack, as well as figure out what's going on. Being so experienced, he might figure out that Kastro conjures a clone, or maybe extra limbs, but since he has the general idea, Kastro goes ahead and reveals his clone. They will both go to simultaneously attack Knuckle with True Tiger Bite Fist. Knuckle will dodge because he does not want to get hit with a Tiger Bite Fist as he attempts to hit one of the Kastros, and hitting both will reduce his punching power, giving Kastro the opportunity to sever his arms. Of course, being very experienced, Knuckle probably has a way of dealing with this. At the same time, however, Kastro is also very experienced as he fought at Heaven's Arena for at least two years.

If Knuckle hits the clone, then Kastro will likely call it off after seeing APR growing. This brings up the question: will a new double have APR attached? I believe it won't since every clone is its own being, which will allow Kastro to repeat the sequence of strikes until he manages to hit Knuckle.

Now, if Knuckle hits the original Kastro, which I find to be highly unlikely given that Kastro would be watching for an attack after learning Knuckle is a melee fighter, I think your composure argument comes into play. Kastro will be utterly confused as to what causes the number to rise. Because of this he might figure it out. If he doesn't, then he might end up wasting his aura. If he does, then he could choose to try and end the battle ASAP after seeing that doing nothing still leads to APR increasing. If he gets distressed though, then his clone won't work and he'll be stuck with Tiger Bite Fist. I think that he would be able to return most of the debt with it and defeat Knuckle, though it's not certain here.