Mongul is one of Superman’s deadliest foes and his power is pretty astonishing. There aren’t many who would be able to take Mongul down in a fist fight, but Gon is a very powerful warrior and he may be able to pull it off. Gon has a pretty good level of speed which will help him evade Mongul’s attacks and he can hold his own in a long range battle thanks to his nen abilities. Mongul takes a loss with this round, but he’ll be back. Gon wins.