Kang-Ho only stopped his attacks on the bat king after hearing the sweet sound of levelling up. If someone with a faint heart looked at the bat king that laid on the ground, they might get nauseous just from the sight of the thing. The bat king that was laying on the ground was incomparable to the bat king which was still alive, the only thing you could see when you looked towards the bat king now was a pile of mushed meat.