Dark Yojimbo Dark Yojimbo is an optional boss in the International , PAL and " HD Remaster " versions of " Final Fantasy X " . He becomes available after leaving and reentering to the Cavern of the Stolen Fayth after completing its events . Encountering . He can be encountered in the back of the cavern . Even if he has already been summoned , the party may still opt not to fight him and leave using the teleporter . The party must fight him five times to defeat him . The player can exit and enter the Cavern of the Stolen Fayth and fight Dark Yojimbo as many times as they wish , as long as they do not defeat him for the fifth time in a consecutive order . Doing so will allow easy Dark Matters , Master Spheres ( Master Spheres are a rare drop ) , Ribbons and / or Break HP Limit to drop every time he is defeated . The player doesn ' t need to leave the cave as it is enough to merely enter the blitzball menu in a save sphere . The player can use the save sphere between battles to heal up , but if the player gets a Game Over , or uses the soft reset , they have to start again from the first battle with Dark Yojimbo , so the player always has to fight the five battles in row , even if they save between battles . Dark Yojimbo can be fought only four times instead of five , as the third encounter can be skipped , and moved to the fourth area , and the final battle at the cave entrance will be the fourth battle . There ' s a difference in the cutscenes if the third area is skipped . Defeating Dark Yojimbo five times in a row has the summoner bow and leave the cave peacefully . In the shortcut method the summoner will look scared and run out of the cave in panic . However , to truly defeat Dark Yojimbo , the player has to fight him five times in a row . If the player skips the third fight , Dark Yojimbo won ' t be considered defeated , thus making it impossible to unlock Penance . If that is the case , the player can enter the cave and fight him again five times . After encountering the first Dark Yojimbo , the entire area ( Sunken Cave ) will have no random encounter s until the player wins the fifth Dark Yojimbo encounter , or uses a teleporter to leave the cave . However , it is possible to initiate the random encounters after the first Dark Yojimbo is defeated : the player needs to step on the teleporter and choose to teleport either on the left or right areas ( but not back outside the cave ) . When the player runs back inside the Sunken Cave , random encounters spawn again while the second to the fifth Dark Yojimbos can be fought on certain locations back outside the cave . Battle . Dark Yojimbo always ambushes the party in the first battle , even with Initiative , but the player can still get a turn before Yojimbo by using First Strike weapons . Kozuka and Daigoro target a single character , but Wakizashi always targets the whole party . A high Defense stat can reduce the damage from all three of these attacks , as can measures such as Protect or Cheer . Dark Yojimbo ' s Overdrive — Zanmato — deals 99 , 999 damage to the whole party and removes Auto - Life . A high defense aeon using Shield will take around 50 , 000 damage from it ; this can be reduced to 34 , 000 with Cheer . Both Daigoro and Kozuka can randomly hit for 99 , 999 damage . If Daigoro hits for 99 , 999 damage against a party member not protected against petrification , or otherwise KOs the character , that character will shatter and will be unavailable for the remainder of the battle . Also , this attack inflicts Poison . Kozuka inflicts Full Break and Slow . Strategy . The battle is easier if all characters have maxed out Strength , Defense , and Agility , as well as having Luck at 125 or higher . Stoneproof / Ribbon , Auto - Haste , Auto - Protect , and Auto - Phoenix are also useful , if not necessary . Rikku ' s Ultra NulAll can be used to grant maximum stat boosts to the party . Wakizashi ' s damage can be reduced under 9 , 999 by using Protect , Cheer and Defense Plus , so Break HP Limit is not necessary . The only way to survive Zanmato is to call an aeon to take the blow . It is possible to beat Dark Yojimbo using an aeon ; the Magus Sisters and Anima are recommended . A high - defense aeon using Shield will take less than 99 , 999 damage from Zanmato , meaning they can survive it without having to call in a second aeon . Dark Yojimbo has a relatively low Magic Defense . If one has trouble hitting him , doublecasting Ultima deals decent damage , and if the party members have Copycat they can easily mimic it . As any other enemy , Dark Yojimbo can be killed by Yojimbo ' s Zanmato attack , but it ' s unlikely to get it five times in a row .