How to increase punching power, to knockout capabilities. Mas Oyama said the ultimate goal in karate was to...

He said the ultimate goal was to be able to win the figth with a blow. He actau;;ly was able to knock people out , and break ribs or dislocate arms with his strikes. I relaises I am no and will never be a Mas Oymama or even close , but I wnat to know whats the best way to develope the explosibve punching strength to knock someone for a loop if I had to. People say Body builders and stuff don't possess the right strength , but I have seen high school kids who do nothing but bench and squat knock people out and break jaws. How do all the naysayers explain this. Other than that how to develope the explosive strength to hit very hard , should I focus on pull-ups , muscle ups, one arm pushups, explosive pushups, russian twists, core movements with resistance bands, and clean and presses and handstand puhsups. Also maybe throw in some squats. Or what.