once you unlock nemesis (omega gold in Jap. version) beat him and you will either recieve armour with break hp limit, or a weapon with break damage limit. its only 25,000 gil and is more consistant than bribing. or if you bribe... great marlboro for 1,280,000 gil and 540,000 gil for Marlboro. shinryu also has wings, but its hard to beat him, and sometimes you might get dark matter instead.