!!!WARNING THE FOLLOWING INCLUDING MAJOR SPOILERS FOR SOME VEIWERS!!!
When Neferipitou says under her breath that Gon-sans mature form is equal to Meruems power, would it have changed after Meruem consumed the majority of Youpi and Pouf and increase his AP (Attack Power) or just give Meruem their sole powers. Because if Meruems sole phyisical power did not change would that imply that Gon-sans (mature form) was just as powerful if not more powerful than Meruem? I was just curious of to which had more power and if Gon-san would be able to defeat Meruem. This of course is assuming that Meruem was returned to normal power when he consumed Youpi and Pouf in the first place and not infact less powerful because of the Miniture Rose damaging him and greatly reducing his power to near nothing. I was just a bit confused as to the amount of power each of them have/had and if anyone would have some kind of calculation as Knuckle had done to Gon where he averaged the persons Aura Points that would help a lot. Thanks!!!
I'm assuming she meant he was equal to the kings base form since it would be impossible for her to know that the king consumed Pouf and Youpi, which would have made him MUCH more powerful than what he once was. As to who is more powerful, on a whim I would say Meruem what with the whole "ultimate life-form" thing he had going for him, but I'm not sure any one can say for certain. After all, aside from Gon's beat-down of pitou of which we only saw him throw 4 punches(on screen) and Meruem karate chopping the shit out of Knuckle and chameleon guy, we've not seen that much of either of them. Plus, I'm only saying I think Meruem would win if the two would fight, but thhat doesn't mean they're equal in all area's. For instance, Gon presented a much more devestating show of Nen than anything Meruem had shown, pre or post-rose, and he R.K.O'd once of the strongest characters in one punch, so it's possible that he could excel meruem in sheer strength(also having the advantage of being an enhancer), but as I said, Meruem's entire character was built on the premis that he is the strongest character in the series. That's why for almost the entire Chimera ant all he did was play gungi. That's why Netero, one of the most powerful combatents in the series only inflicted a few cuts and bruises when he attacked him with every ounce of his aura. So on that basis alone Meruem may be the victor, but who knows?
When Pitou said that Gon's power was equal to Meruem, she wasn't aware of Meruem's experience with the minature rose or that he had consumed much of Pouf and Youpi. That means she was comparing Gon to pre rose Meruem. While the King did inherit Pouf and Youpi's powers after the explosion, he also gained extra strength from them in addition to his own. That is why Pouf and Youpi's strength was reduced greatly after "feeding" themselves to Meruem. Basically, post rose Meruem would technically be stronger than adult Gon if you're going by what Pitou said. It is also possible that Pitou overestimated Gon's strength because of the shock that she was in. Just my thoughts.
Keep in mind that Gon's goal was to become strong enough to defeat Pitou. Theoretically speaking, if he had been in a situation where he were fighting post-rose Mereum instead, it's possible that a goal to defeat him could have made Gon even more powerful. We also never saw the full extent of his power and abilities when he did fight Pitou, as he only threw a few punches. There's no way of knowing if transforming into his adult form might have unlocked any special techniques or abilities, or if he was even using his full strength against Pitou. In addition, Pitou also only assumed Gon's power to be on par with pre-rose Meruem. While she was a highly advanced nen-user, it's unlikely that she could 100% accurately gauge their power levels just by looking at them. It's possible that both of them, Gon and Meruem, were at such high levels beyond Pitou as for her not to be able to accurately read their power levels at all, and thus she placed them at the same level simply because she knew they were much stronger than she was.
That said, this is all hypothetical, of course. It's unlikely Gon would have been able to achieve this transformation if he fought against Meruem pre or post rose. Perhaps if he discovered that Meruem had "killed" Netero, technically, or if Meruem had harmed or killed Killua. Otherwise, he most likely would have lacked the intense feelings of anger and vengeance that led up to the transformation against Pitou.
Actually that was a misstranslation. I understand Japanese and what Pitou said exactly was "Gon's fangs could reach the kings neck" so exactly how strong Gon was is not known. Just that he could challenge the king.