He turned so mentally unstable that the sole known approach to non-fatally subdue him was to invoke the worry of Demise. It is instructed by Goku that Broly can control himself if he receives the correct education, presumably like his Universe six counterpart and fellow Famous Saiyan Kale whom Goku http://archerwgoxg.blogs100.com/14310684/the-ultimate-guide-to-dragon-ball-super-super-hero-manga