The idea that Youpi or Poor Man's Rose are nuke level is preposterous. Youpi didn't even destroy the tower Morel was in that was nearby and explicitly affected by the blast. As for the nuke, Netero and Meruem were about 60 kilometers from the Royal Palace, as Pouf said it would take 15 minutes for Meruem with Pouf's speed to reach there, and Pouf said Killua could run about as fast as him even if Pouf wasn't weakened. In chapter 328, Killua says at his top speed, it would take him 10 minutes to run 40 kilometers. At a distance of 60 kilometers, the people around the Palace would be affected by a Tsar Bomba level nuke. I also want to know how Netero's Zero Hand got calced to nuke level, as all it did was scuff up Meruem without affecting the surroundings. I'm also sure the calc for Meruem being nuke level is flawed but I'd like to see it posted again.