Trema ( boss ) Trema is an optional boss fought in the bottom of Via Infinito in " Final Fantasy X - 2 " . He is fought immediately after Paragon , and is regarded as the game ' s superboss . Trema can be fought in the final cup of the Fiend Arena in the International and HD Remaster versions , and fights identically to how he does in the Via Infinito . Defeating him in " Final Fantasy X - 2 HD Remaster " will unlock the " Founder " trophy . Battle . The party will start the battle in the condition the Paragon battle ended . Trema primarily uses 3 - hit physical attacks , some of which can inflict status effects like Poison and Stop . These attacks have no charging time and a low cooldown , allowing him to attack several times in a short period . He also uses Demi , Flare , Ultima , and Meteor . In the original version of X - 2 , Meteor is a physical attack that hits random targets and takes 12 . 5 % off the target ' s HP per hit , but the damage can be halved with Protect and reduced to 1 HP damage with Sentinel . In the " International " and " HD Remaster " versions , Meteor is a magical attack which must be halved with Shell instead of Protect , and cannot be reduced to 1 damage with Sentinel . He will use Meteor after losing 50 % of his HP and again after losing 75 % . After losing 87 . 5 % , he will use Ultima . Trema only uses Meteor twice in battle . Trema has very high Evasion , making him near - impossible to hit with regular attacks without a high Luck stat . Beating Trema will award the handy Iron Duke accessory , which doubles maximum HP and MP and adds a + 100 to all stats except Agility and Luck , which have a respective + 10 and + 50 bonus . Strategy . Facing such a powerful enemy , defensive strategies are of the utmost importance . Both Warriors and Dark Knights have defensive uses in this battle , despite their high strength counting for nothing as Trema evades normal attacks . Cat Nip / Trigger Happy is , as always , a powerful addition . As the player begins the battle against Trema in the condition the Paragon battle ended , the first moves may be the need to heal . It is best to aim to have over 9000 HP by the time Trema uses Meteor . Mix is a powerful tool in any battle . For example , if the player bribe d Paragon , or got his rare drop , they will have some Dark Matters ; an Alchemist can Mix a Dark Matter with any other item to make the party temporarily invincible . Stamina Springs can be used alone to double the party ' s HP , or with Mix to create the Mega Vitality effect ( Stamina Tonic has the same effect in Mix , but will additionally double the party ' s MP ) . Chocobo Wings can be Mixed with any non - status item to give Final Wall or used singly for Haste . Alternatively , Defense Bracers give a constant Protect and Shell effect . Twin Stars or Three Stars items will not only give the Spellspring effect , reducing the cost of spells to zero MP , but reduce the HP cost of Dark Knights ' Darkness ability to zero as well . A good defensive strategy is to bring a Warrior into the fight . If Trema ' s MP has been drained , all of his remaining attacks , including Meteor , can be reduced to 1 damage with Sentinel . When Trema enters a spellcasting animation , the Warrior can drop Sentinel to attack or use items as necessary . A popular accessory for the Gunner in this fight is Cat Nip , which causes a near - death character to deal 9 , 999 damage per hit . Under these conditions Trigger Happy should do around 150 , 000 damage to Trema . The player should keep the other characters at full health while the Gunner continues to use Trigger Happy . After one or two rounds of Trigger Happy , Trema should cast Meteor , which is likely to kill the Gunner , and Trema ' s physical attacks can also kill the Gunner ; either way , the party can use Phoenix Downs to revive her . If the player does not use the Cat Nip accessory the battle will take longer . This method no longer works in the " International " and " HD Remaster " versions as Cat Nip adds Auto - Berserk and Auto - Slow . A good strategy is to begin the fight by having the Gunner with Cat Nip use Target MP on Trema . If she is in HP Critical it will completely drain all of Trema ' s MP , which makes him unable to cast Ultima and Flare , though he can still cast Meteor . Other methods to drain his MP include Mana or Soul Spring items , Thief ' s Pilfer MP , and Samurai ' s Magicide . In the " International and HD Remaster " versions of the game , Trema has the Spellspring ability and thus draining his MP will have no effect . Dark Knights ' abilities are ideal for keeping HP high enough to survive Meteor while attacking . Because Black Sky is a magic version of Meteor , it is still effective against Trema ; to Chain it requires Ethers in inventory . To chain Darkness requires the use of Twin Stars or Three Stars to reduce HP cost or the Dark Knights ' Drain ability to get HP back . Dark Knight is a good dressphere for the battle for its high HP and Defense ; moving the Dark Knights all the way around the edge of the Valiant Lustre Garment Grid gives them full HP ( 9 , 999 ) and maxed out Defense and Magic Defense . Another strategy is to have everyone in the Mascot dressphere and using the Higher Power Garment Grid . Yuna must have learned Moogle Cureja and Paine must have learned Cactling Gun as well as Nonpareil from the Samurai dressphere . All girls should be equipped with Crystal Bangles . The player also needs a Kaiser Knuckles ( for Paine ) , a Rabite ' s Foot ( for Rikku ) and a Ribbon ( for Yuna ) . At the start of the battle the player should use a Stamina Tonic to double the party ' s HP and a Megalixir , as well as using Light Curtain / Lunar Curtain for protection . Paine must course through the gates of the Higher Power Garment Grid to get the Break Damage Limit ability . Nonpareil can be used up to five times for a Strength boost . After this , she can start attacking with Cactling Gun . When Paine ' s attack animation begins , Rikku should hit Trema and chain her attack with Paine ' s Cactling Gun . Rikku ' s attack will deal very little damage , but if timed correctly will allow Cactling Gun to deal about ~ 70 , 000 / ~ 99 , 999 damage , depending on Paine ' s Strength stat . However , attacking during Trema ' s casting animation won ' t build a chain attack , although Cactling Gun will still deal high damage . Yuna must be constantly using Moogle Cureja to heal the party ' s HP and status ailments caused by Trema ' s physical attacks . Rikku should occasionally use a Mega - Potion / Megalixir to complement Yuna ' s healing . The player should always keep the party ' s HP high enough to survive Meteor and Ultima . If one runs out of MP , a Ether / Turbo Ether can be used . Trema has very high evasion , but Rikku can hit him due to her high Luck stat ( provided by the Rabite ' s Foot accessory ) , whereas Cactling Gun ignores evasion . This same strategy can also be used to defeat Paragon , so the player can carry on the same adjustments to the battle with Trema .