Well, I think he's to blame for it in Mexican wrestling. He said in interviews that he was doing the rockstar look thing while he was dating a girl that was semi-famous in Mexico and CMLL told him to just go with the look he had then which got extremely popular.
He also had almost no training, but he was doing it before Charly Manson, Cibernetico, Electroshock, Psicosis, Chessman and the rest of those guys were doing it.
also Parka has been so gigantic for so long I almost forgot how athletic he used to be