Sun Wukong did not go to obtain the scriptures at all. The monkey Tang Sanzang rescued from the Five Elements Mountain was not the monkey that caused havoc in the Heavenly Palace;
The six-eared macaque has never pretended to be Sun Wukong and has been living well, but he is just a little timid;
Jin Chanzi deliberately let Sha Wujing eat him nine times because he was practicing a magical power called "Lingchan's Nine Transformations";
Journey to the West, those secrets and tricks...