Concherer The Concherer is a boss from " Final Fantasy X - 2 " , found in Via Infinito on the 60th floor . It was once Grand Maester Yo Mika . Battle . Concherer has high HP , Strength , Defense , Auto - Protect and Auto - Shell . His strongest attack is Megaton Press which does up to 65 , 000 damage , but only hits one person and he only does it every once in a while . Concherer ' s regular attacks do 2000 - 3300 damage and he often drains the party ' s MP by using Gunk which also inflicts Poison . When Concherer Oversouls , he loses Megaton Press and Gunk , but gains Demi , Slurp , Radular Grudge , Thundaga and Flare . Slurp inflicts major non - elemental damage and Itchy , while Radular Grudge does minor non - elemental damage and inflicts Poison , Silence , Darkness and Confusion . Strategy . It is a good idea to bring a stack of Phoenix Downs and Mega Phoenixes due to Concherer ' s one - hit kills . Using Light Curtains at the start of the battle helps greatly , as does using Remedies to heal the status effects Concherer can inflict . One strategy is to have a Gunner in HP Critical health with the Cat Nip accessory ( which can be won from the previous boss ) . With the Trigger Happy command , Concherer will be defeated in a few turns . Another girl should revive the Gunner with a Phoenix Down if she dies . A Dark Knight ' s Black Sky spell is a good alternative , as it hits ten times . This strategy is no longer viable in the and " HD Remaster " versions , due to Cat Nip inducing Auto - Berserk , but , as an alternative method , the player can equip Cat Nip to a Thief , who will deal two hits of 9 , 999 damage every turn . The other two party members should be Berserkers , or a similarly fast class , and equip accessories with either the Auto - Haste or SOS Haste abilities . All three girls should have protection from Poison to nullify Gunk . Since Concherer ' s moves will only kill one character at a time , another girl can revive her with a Phoenix Down before he strikes again . It will take the Thief 18 attacks ( at 9 , 999 * 2 damage each ) to kill Concherer , which can be accomplished in under ten minutes . Another strategy is to use three Berserkers with Luck - enhancing Garment Grid s and accessories , plus Star Bracers for Auto - Reflect to block Flare ( and to use it to damage Concherer himself ) . If Star Bracers are unavailable , a Star Curtain or Reflect can be used instead . As the player may be filling out Shinra ' s Bestiary , it may benefit to come into the battle against the Concherer Oversouled . An Oversoul Concherer loses his best attacks , and his spells can be reflected onto it for damage . Shell is recommended to reduce damage if Reflect is not used . If the player has completed Shell Shocker ' s fiend tale it ' ll be available to fight in the Fiend Arena . It is possible to fight it there until it Oversouls , then come back and fight Concherer . Another strategy for the " HD Remaster " is to have one Thief and two Warriors and base it off the strategy above . The Thief should equip a Cat Nip and Haste Bangle and it is recommended , but not necessary , to have both Warriors wearing a Shining Bracer ( Auto - Protect ) and Speed Bracer ( Auto - Haste ) . The party can enter the battle with the Thief in HP critical to trigger the Cat Nip and the goal is to get the Thief to attack 18 times ; if equipped with the Haste Bangle , the Thief should be attacking almost back to back . The Warriors should use Sentinel so all attacks on her deal only 1 point of damage , or use a Phoenix Down on the Thief if she dies . To end the battle in approximately 30 seconds , one should ensure Concherer will be Oversouled by repeatedly battling and then finally fleeing from the Sleepy Sneaky team once it Oversouls in the Fiend Arena . Then , the player can equip both a Wring and a Bloodlust to a high - level Machina Striker that has Total Limit Break , then replace those two accessories with an Adamantite and a Cat Nip ( equipping the accessories in this order prior to battle brings the Machina Striker to critical HP to activate Cat Nip at the start of the fight ) . Machina Striker should be taught First Strike using two Sprint Shoes , then initiate the battle . Attacks like Gunk and Demi will pose no threat to the Striker , and it should be able to endure one Flare thanks to the Adamantite . If Machina Striker gets to attack three times ( it uses Triple Play ! for over 100 , 000 damage each turn ) , the player will win . Creature Creator . When the Concherer is captured at Chapter 5 in Bevelle with a Trap Pod L , after clearing 60 Cloisters in Via Infinito , it comes equipped knowing Attack , Cure , and Gunk . It has Ailment Def . , which acts as Super Ribbon , and Total Limit Break , which allows it to break HP and Damage limits . Concherer cannot learn his hard - hitting Megaton Press , or Slurp . Concherer has absurdly high Defense and Magic Defense , both due to its unbreakable shell , mediocre Accuracy , Strength , Agility , and high Magic . It has low Evasion and Luck . Fiend Tale . Another Concherer trapped a PuPu when it entered the fiend ' s vacant shell before it returned . Shinra , unaware of the PuPu and thinking it was what the Concherer was in life , tries helping it out . After tugging and smashing the shell to free it fails , the PuPu gets an idea . Having Shinra release the Concherer on the beach of Besaid , the PuPu guides the fiend to dive into the water to have it dissolved by the briny water , as salt dehydrates a snail . Once the Concherer is no more , the PuPu emerges and thanks Shinra in Spira n language as it leaves in a flying saucer .