Hey Ultima Shadow. the YSLS-Zero was the Yevon robot boss at the end of chapter one.

the Precepts Guard was a boss you fought in beville underground in chapter 2 that came out of the huge pit.

and the Angra Mainyu was the super boss you thought in Bikanel desert after completing the cacutar quest.

damn, i forgot u hate this game so it dont matter. thanks for still voting and you Spirit Wolf.