Final Fantasy X/Monster Arena

The Monster Arena is a place at the far eastern side of the Calm Lands area where you can fight fiends from all over Spira. However, when you first get there, the old man running it says all of the fiends escaped. So, prepare to do a nice big tour of Spira collecting them for him again!

Capture Weapons
In order to "capture" a fiend, you need to land the killing blow with a weapon that has the Capture auto-ability. This cannot be customized; instead, you need to buy it from the owner of the Monster Arena for 9,075 Gil (there's a capture weapon for every character). All of these weapons come with Capture and one empty slot for you to customize.

You can't capture a fiend by killing it with a spell from a character who has their capture weapon equipped, or by using an Overdrive on it. You can, however, use a skill (like Mug or Dark Buster) to capture them.

There are numerous abilities that will make capturing fiends (especially the tougher ones) a lot easier:


 * Sensor will help you determine how much HP your opponent has left and so you know whether or not you can switch in a more powerful character and use an Overdrive or spell on it.
 * Deathstrike helps a lot; very few fiends in the game are immune to instant death and killing an enemy with Deathstrike still counts as a capture. Most of the fiends from earlier parts of the game are too weak to survive one hit from your weapons at this point anyway, but it helps when capturing monsters from Mt. Gagazet, Inside Sin, or Omega Ruins.
 * Piercing can be quite useful for characters whose weapons are naturally piercing; whereas a monster may take three hits from other characters the likes of Auron (or possibly Kimahri, depending on his Strength skill and whether or not you got him his capture weapon or not) can kill it in one.
 * Counter-attack/Evade & Counter/Magic Counter is useful against later enemies and ambushes as it will allow you to counter an attack, and with weaker enemies, kill and capture them without even taking a turn. Again, this isn't much use against weaker fiends but against stronger ones it really helps.

The Fiends
Below is a list of all the fiends in each area or category (and their species type), and any other information about them.

Besaid

 * Dingo (Lupine) [Costs 24 Gil to fight in the Monster Arena]
 * Condor (Bird) [Costs 18 Gil to fight in the Monster Arena]
 * Water Flan (Flan) [Costs 27 Gil to fight in the Monster Arena]

Kilika Woods

 * Dinonix (Reptile) [Costs 40 Gil to fight in the Monster Arena]
 * Killer Bee (Wasp) [Costs 34 Gil to fight in the Monster Arena]
 * Yellow Element (Elemental) [Costs 49 Gil to fight in the Monster Arena]
 * Ragora (Plant) [Costs 72 Gil to fight in the Monster Arena]

Mi'ihen Highroad
Note: Ipirias, Thunder Flan, and Vouivre generally only appear along the Oldroad (the lower road north of the inn). Mi'ihen Fang, Raldo, and White Element generally only appear on the highroad and new road.
 * Mi'ihen Fang (Lupine) [Costs 49 Gil to fight in the Monster Arena]
 * Ipiria (Reptile) [Costs 69 Gil to fight in the Monster Arena]
 * Floating Eye (Evil Eye) [Costs 66 Gil to fight in the Monster Arena]
 * White Element (Elemental) [Costs 72 Gil to fight in the Monster Arena]
 * Raldo (Helm) [Costs 63 Gil to fight in the Monster Arena]
 * Vouivre (Drake) [Costs 90 Gil to fight in the Monster Arena]
 * Bomb (Bomb) [Costs 105 Gil to fight in the Monster Arena]
 * Dual Horn (Ruminant) [Costs 157 Gil to fight in the Monster Arena]

Mushroom Rock

 * Raptor (Reptile)
 * Gandarewa (Imp)
 * Thunder Flan (Flan)
 * Red Element (Elemental)
 * Lamashtu (Drake)
 * Funguar (Fungus)
 * Garuda (Roc)

Note: Thunder Flans also appear along Mi'ihen Oldroad.

Djose Road

 * Garm (Lupine)
 * Simurgh (Bird)
 * Bite Bug (Wasp)
 * Snow Flan (Flan)
 * Bunyip (Helm)
 * Basilisk (Basilisk)
 * Ochu (Ochu)

Note: Simurghs and Basilisks generally only appear along the road leading away from the Battle Site. Ochus only appear along the road between the fork and the Moonflow. Ochus are most easily found on the first road leading to Moonflow, just before the exit to the next area.

Thunder Plains

 * Melusine (Reptile)
 * Aerouge (Imp)
 * Buer (Evil Eye)
 * Gold Element (Elemental)
 * Kusariqqu (Drake)
 * Larva (Larva)
 * Iron Giant (Iron Giant)
 * Qactuar (Cactuar)

Note: Iron Giants only appear in the northern section of the plains, and Cactuars appear more frequently after you've prayed at the Qactuar stones.

Macalania
Note: Snow Wolves, Evil Eyes, Ice Flans and Mafdets appear in the Lake section, whereas the rest in the Forest part.
 * Snow Wolf (Lupine)
 * Iguion (Reptile)
 * Wasp (Wasp)
 * Evil Eye (Evil Eye)
 * Ice Flan (Flan)
 * Blue Element (Elemental)
 * Murussu (Helm)
 * Mafdet (Helm)
 * Xiphos (Blade)
 * Chimera (Chimera)

Bikanel

 * Sand Wolf (Lupine)
 * Alcyone (Bird)
 * Mushussu (Drake)
 * Zu (Roc)
 * Sand Worm (Worm)
 * Cactuar (Cactuar)

Sand Worms and Zus appear more often in Sanubia Desert - Central on the left portion of the map. Cactuars appear throughout but are the rarest. By the time you collect all the Sand Worms and Cactuars, you'll most likely have captured 10 of everything else.

Calm Lands

 * Skoll (Lupine)
 * Nebiros (Wasp)
 * Flame Flan (Flan)
 * Shred (Helm)
 * Anacondaur (Basilisk)
 * Ogre (Ogre)
 * Coeurl (Coeurl)
 * Chimera Brain (Chimera)
 * Malboro (Malboro)

Note: Ogres, Anacondaurs and Malboros appear more often in the northwest.

Sunken Cave (Cavern of the Stolen Fayth)

 * Yowie (Reptile)
 * Imp (Imp)
 * Dark Element (Elemental)
 * Nidhogg (Drake)
 * Thorn (Fungus)
 * Valaha (Ruminant)
 * Epaaj (Blade)
 * Ghost (Revenant)
 * Tonberry (Tonberry)

Note: The Nidhogg and Imp also appear on Mt. Gagazet, and Tonberries are quite rare (search in the green room right before entering The Chamber of the Fayth to find the highest encounter rate.)

Another place used to capture Tonberry's successfully can be found as follows: From the entrance, follow the path all the way until the first fork, then turn Right down the hall to the room with the treasure chest on the left that contains a Level 2 Key Sphere. Walk straight to the back of the room until you are off the mini-map. There is a little pocket off of the map where you can run small circles, and the encounter rate for Tonberries is high.

Mt. Gagazet

 * Bandersnatch (Lupine)
 * Ahriman (Evil Eye)
 * Dark Flan (Flan)
 * Grenade (Bomb)
 * Grat (Plant)
 * Grendel (Ruminant)
 * Bashura (Ogre)
 * Mandragora (Plant)
 * Behemoth (Behemoth)
 * Splasher (None)
 * Achelous (Haizhe)
 * Maelspike (Dinofish)
 * Imp
 * Nidhogg

Note 1: Bashuras, Ahrimans, Grendels, Mandragoras, Dark Flans, and Behemoths also appear in Zanarkand Ruins, otherwise (except Bashuras) they are only encountered inside Mt. Gagazet.

Note 2: Splashers, Achelouses and Maelspikes are encountered in the underwater sections of Mt. Gagazet.

Inside Sin

 * Exoray (Fungus)
 * Wraith (Revenant)
 * Gemini Blue (Iron Giant)
 * Gemini Red (Iron Giant)
 * Demonolith (Doomstone)
 * Great Malboro (Malboro)
 * Barbatos (Armor)
 * Adamantoise (Adamantoise)
 * Behemoth King (Behemoth)

Note 1: Demonoliths, Great Malboros and Barbatoses are only encountered in the "City of the Dead" section of Sin (Entrance).

Note 2: Geminis always come in pairs, one of them carries a sword, the other a club. Both count as a unique fiend, so you have to capture both types in order to complete the list.

Note 3: Wraiths, Geminis (both), Demonoliths, Great Malboros and Adamantoises are also encountered in Omega Dungeon, and captured there count towards Inside Sin.

Omega Ruins

 * Zaurus (Reptile)
 * Floating Death (Evil Eye)
 * Black Element (Elemental)
 * Halma (Helm)
 * Puroboros (Bomb)
 * Spirit (Larva)
 * Machea (Blade)
 * Master Coeurl (Coeurl)
 * Master Tonberry (Tonberry)
 * Varuna (Spellspinner)
 * Demonolith (Doomstone)
 * Gemini (Iron Giant)
 * Wraith (Revenant)

Note 1: Great Malboros will appear here; however, unlike the ones inside Sin, these will always ambush you and their first move is always Bad Breath, so watch out. You can also use a First Strike Weapon on a character that has Provoke which will stop the Great Malboro using Bad Breath

Note 2: Demonoliths counter with Pharaoh's Curse, which inflicts poison, curse, darkness, silence, so use Hastega and Quick Hit, OR use silence attack/silence buster; they cant cast Pharaoh's when silenced. They will use Breath to petrify your party, so equip stoneproof. Adamantoises will appear here too, more often on the second area of the ruins (the series of platforms leading to Omega Weapon).

Note 3: Watch out for the Master Tonberry's everything-counter, Karma. Use Tidus or Rikku to avoid a 1-hit KO. Hastega and Auto-Pheonix are vital.

Note 4: In the North American version and HD Remaster on Omega Dungeons' fiends list there are no Demonolith, Gemini or Wraith (all of these captured in Omega Ruins counts as 'Inside Sin' as well as Great Malboro and Adamantoise).

Area Conquest
These are unlocked for capturing at least one of every fiend in a particular area.


 * Stratoavis — Besaid
 * Malboro Menace — Kilika
 * Kottos — Mi'ihen Highroad
 * Coeurlregina — Mushroom Rock Road
 * Jormungand — Djose Road
 * Cactuar King — Thunder Plains
 * Espada — Macalania
 * Abyss Worm — Bikanel
 * Chimerageist — Calm Lands
 * Don Tonberry — Sunken Cave
 * Catoblepas — Mt. Gagazet
 * Abbadon — Inside Sin
 * Vorban — Omega Ruins

Species Conquest
These are unlocked for getting a capturing a specific amount of all of a species of fiend.


 * Fenrir — 3 of all Lupines (Dingo, Mi'ihen Fang, Garm, Snow Wolf, Sand Wolf, Skoll, Bandersnatch)
 * Ornitholestes — 3 of all Reptiles (Dinonix, Ipiria, Raptor, Melusine, Iguion, Yowie, Zaurus)
 * Pteryx — 4 of all Birds (Condor, Simurgh, Alycone)
 * Hornet — 4 of all Wasps (Killer Bee, Bite Bug, Wasp, Nebiros)
 * Vidatu — 4 of all Imps (Gandarewa, Aerouge and Imp)
 * One-Eye — 4 of all Evil Eyes (Floating Eye, Buer, Evil Eye, Ahriman, Floating Death)
 * Jumbo Flan — 3 of all Flans (Water Flan, Thunder Flan, Snow Flan, Ice Flan, Flame Flan, Dark Flan)
 * Nega Elemental — 3 of all Elementals (Yellow Element, White Element, Red Element, Gold Element, Blue Element, Dark Element, Black Element)
 * Tanket — 3 of all Helms (Raldo, Bunyip, Murussu, Mafdet, Shred, Halma)
 * Fafnir — 4 of all Drakes (Vouivre, Lamashtu, Kusariqqu, Mushussu, Nidhogg)
 * Sleep Sprout — 5 of all Fungi (Funguar, Thorn, Exoray)
 * Bomb King — 5 of all Bombs (Bomb, Grenade, Puroboros)
 * Juggernaut — 5 of all Ruminants (Dual Horn, Valaha, Grendel)
 * Ironclad — 10 of all Iron Giants (Iron Giant, Gemini A, Gemini B)

Original
These are unlocked when specific conditions are met.


 * Earth Eater — capture all the fiends from 2 different areas
 * Greater Sphere — conquer 2 species
 * Catastrophe — capture all the fiends from 6 different areas
 * Th'uban — conquer 6 species
 * Neslug — capture 1 of every fiend (or, conquer all areas)
 * Ultima Buster — capture 5 of every fiend
 * Shinryu — capture 2 of each fiend in the underwater section of Mt. Gagazet
 * Nemesis — capture 10 of every fiend and defeat all of the other arena creations

General Tactics
To even have a chance against almost any of the monster arena creations requires you to be considerably more powerful than you need to be to complete the main story line. To achieve this powerful status will require 3 things: Although described below is a method to fully meet these 3 objectives, bear in mind that you will be able to defeat the area creations after getting the weapons required and covering less than half of the sphere grid, the species creations after covering a bit more of the sphere grid (you will need to be able to hit for 99999) and the original creations with good armor and most of the sphere grid covered. You will only need to max out the sphere grid if you plan to take on the later Dark Aeons (the final 4) and Penance. (Only on International and PS3 version)
 * Suitable weapons
 * Suitable armor
 * Covering the sphere grid

Weapons
The Celestial Weapons are the way to go here. You will want to try and fully upgrade as many of the 7 weapons here as possible, or at least half upgrade them so the respective Aeon can break the damage limit. The process to go through to upgrade each character's weapon is detailed on their individual character page.

You may notice that with the Celestial Weapons, the favored big hitter, Auron, does considerably less damage than Tidus and Wakka. This is because while their weapons do more damage when they are at full HP, Auron's does more when he's on low HP. The direct effect of this is that Auron cannot be effectively used for the Monster Arena. In fact, the only characters you will find to make a big difference are Tidus, Wakka, Yuna and Rikku. At this point in the game as you should be close to completing everyone's Sphere Grid the only thing that majorly sets them apart is their Overdrive, Celestial Weapon, and in Yuna's case ability to summon.

Tidus should have his Blitz Ace overdrive, Wakka should have Attack Reels (which you should be able to get 12 hits every time with), Yuna should have all her Aeons and Rikku has her Mix overdrive. It is these features that sets these characters apart, and they are all you need for this part of the game (if you only intend to do the Monster Arena you will only need one of Yuna or Rikku).

Armor
You will most likely require two sets of armor for the Monster Arena, a general set and a set which protects against certain status ailments. To get the required armor, you will need to obtain (either from defeating powerful fiends or more likely buying from Wantz in Macalania) a piece of armor with 4 free slots for each character. The anti-status ailments armor should be customized to include:
 * Auto-Med
 * Requires 20 Remedies
 * Bribe 80 from the Lord Ochu for 93,000 Gil.
 * Bribe 70 from an Ochu for 144,000 Gil.
 * Steal from Marlboro enemies.
 * Deathproof
 * Requires 60 Farplane Winds
 * Bribe 60 from Wraiths for 445,000 Gil.
 * Steal from Coeurl Regina.
 * Berserkproof
 * Requires 32 Hypello Potions
 * Bribe 10 from Raldos for 5,000 Gil.
 * Steal from Halma.
 * Confuseproof
 * Requires 48 Musks
 * Bribe 3 from Evil Eye A for 6,200 Gil.
 * Steal from Evil Eyes (ideally Ahriman).

The general armor should consist of 4 of:
 * Break HP Limit
 * Requires 30 Wings to Discovery.
 * Bribe 4 from Marlboros for 540,000 Gil.
 * Auto Protect
 * Requires 80 Light Curtains.
 * Steal from Iron Giants, Ironclad or Tanket.
 * Auto Shell
 * Requires 80 Lunar Curtains.
 * Steal from Defender, Jumbo Flan or Juggernaut.
 * Auto Haste
 * Requires 80 Chocobo Wings.
 * Bribe 60 from Machea for 360,000 Gil.
 * Steal from Cactuar (rare).
 * Auto Phoenix
 * Requires 20 Mega Phoenixes.
 * Bribe 2 from Alcyone for 9,000 Gil.
 * Bribe 38 from Ghost for 199,980 Gil.

For your general armor you will want to choose between Auto-Phoenix and Auto-Haste. You will want Auto-Phoenix on at least one person in your chosen 3, but if you choose to put it on 2 then there is the advantage that you cannot die from enemies without multiple target attacks. However, if you don't put Auto-Haste on, it means you will need to cast Haste again every time someone is resurrected. If you choose to have just one character with Auto-Phoenix make sure they are always in Auto-Life status.

Finally, you will notice an great amount of Gil is required to obtain many of the items needed for customization. There are 2 ways the obtain it. The easiest of which is to kill Mimics at the Omega Ruins. These give 50,000 Gil each (100,000 Gil if you hit them with a Gillionaire enabled weapon such as the Godhand). The other option would be, when you are powerful enough to defeat One Eye, he regularly drops equipment with Triple AP that can be sold for upwards of 60,000 Gil. He has the added bonus of being a Monster Arena fiend only so you won't have to look for random encounters to fight him.

Covering the Sphere Grid
This section will cover how to max out the Sphere Grid, however this is not entirely necessary for the Monster Arena. With around 200 Strength and Magic, 150 Defense, Magic Defense, Agility, and most other stats around 100, you will be able to complete the Monster Arena. These stats are obtainable without having to completely complete all of the Sphere Grid. However if you intend to fight the Dark Aeons and Penance, you will you need to max out everyone's stats.

To fight the Area Creations you need a powerful Yuna and you can let the Aeons do the hard work for you. However, the species and original creations (with a couple of exceptions) will require your party to reliably hit for 99999 a turn. This is not as intimidating as it sounds, and in most cases with the Celestial Weapons requires a Strength of just above 100.

Starting off
When you have learned Holy for Yuna she should progress by going along Auron's grid area. After this you should traverse Lulu's grid area ensuring to learn Doublecast and Ultima. Then she should be put along Tidus then Wakka's grid areas. Tidus, Wakka and Rikku should be taken along Auron's path, then each other's and finally along Yuna's then Lulu's. By the time you have done this you will most likely be powerful enough to take on the species and possibly original creations.

Some abilities you need to make sure all characters have are as follows: Attacks like full break, bribe, zombie attack and holy would help but it is not necessary to have every character with these attacks. The overdrives Blitz Ace, Attack Reels and Banishing Blade are also a necessity.
 * Quick hit
 * Haste
 * Auto-life
 * Ultima
 * Doublecast
 * Copycat
 * Quick pockets (EU version only)
 * Use
 * Entrust

Of course this requires a ridiculous amount of sphere levels which at first will be hard to get, so at low levels your best bet would be to power Yuna up (especially in strength) as the Aeons will increase in power considerably. This will probably allow the likes of Anima, the Magus Sisters and Yojimbo to help you to defeat a fair proportion of the area creations.

After a bit of fighting you will be able to defeat the species creations One Eye and Pteryx with the help of the Aeons which will open up the opportunity to collect huge amounts of AP. Pteryx will drop Evasion Spheres which will help you through a lot of the battles to come, but more importantly One Eye drops not only Magic Defense Spheres but also weapons with triple AP. You will need to fight One Eye until you have a weapon of this type for each of the characters you want to level up.

Gaining Levels
Add Double or Triple Overdrive to your triple AP weapons, but most importantly add Overdrive->AP. This requires 10 Doors to Tomorrow, 2 of which can be bribed from Mech Leaders on Mt. Gagazet for 74,000 Gil or capture every monster in 6 areas and you will be rewarded with 99 of them. Now you will need to choose a sacrificial character (Kimhari would be a good choice) and if possible get rid of his HP nodes using clear spheres.

Next, you must ensure he has defeated as many enemies as possible. The easiest way to do this is by constantly killing Dingos in the Monster Arena (which can easily be done by giving him a weapon with first strike and using a turbo controller). Now you must put your sacrifice in the first 3 with two other characters you wish to level up. Set their overdrive modes to Comrade (if they weren't already), equip your leveling up weapon and fight Don Tonberry.

Attack Don Tonberry with your sacrifice and he will counter with Karma which will hit for 99999 (if it doesn't you haven't killed nearly enough enemies). This would normally cause the overdrive bars to instantly fill, but you have Overdrive->AP on your weapons so instead you will have earned a copious amount of AP. At this point you can use flee and reap your rewards. If you haven't earned 99 sphere levels then either kill more Dingos or revive the sacrifice in the battle and repeat the process a few times until you do earn enough sphere levels.

You can use this tactic to earn as many sphere levels as you wish, but you will soon run out of power, Mana and Speed Spheres (Fortune Spheres are another matter). To get more, fight Kottos and use the relevant distil attack on him and, provided you overkill him, you will get 40 of the require sphere type from him.

Maxing out stats
To max out stats, you have to obtain stat spheres. Most of these stat spheres are dropped by monsters in the Species Conquest, with the exception of Luck Spheres, which are dropped by Greater Sphere in the Original.

Strength Spheres: Dropped by Juggernaut Defense Spheres: Dropped by Tanket Magic Defense Spheres: Dropped by One-Eye Agility Spheres: Dropped by Fenrir Evasion Spheres: Dropped by Pteryx Accuracy Spheres: Dropped by Hornet Magic Spheres: Dropped by Jumbo Flan HP Spheres: Dropped by Ironclad MP Spheres: Dropped by Vidatu Luck Spheres: Dropped by Greater Sphere (Original)

There are 3 very important stats to max if you want to survive the Monster Arena, especially the Original Creations and the Dark Aeons/Penance and deal 99,999 damage to most of them (Jumbo Flan is an exception because it's immune to physical attacks). Those stats are Strength, Defense, and Magic Defense.

Magic Defense Spheres are easily obtained by defeating One-Eye, and you will get many of these because it takes many fights to get all that Triple AP weapons with 2 empty slots for all characters for the Don Tonberry trick.

For the rest of the stat spheres, make sure to have your Overdrive mode to Victor so you can gain Overdrive gauge easily with the Celestial Weapons. (It's 20% but with Triple Overdrive from Celestial Weapons, it becomes 60%) Also make sure the characters traverse most of the Sphere Grid which is possible if you did the Don Tonberry trick to have high stats.

For Strength Spheres and Defense Spheres which are dropped by Juggernaut and Tanket respectfully, there's a strategy to defeat them both quickly. First, you must have full Overdrive gauges for 3 characters. (Tidus, Wakka and Rikku). Then use Mix -> (Ability/Power/Speed/Mana Sphere, Ability/Power/Speed/Mana Sphere) for Frag Grenade, which guarantees Armor Break. You notice that just using Armor Break from Auron's Grid to them do not guarantee Armor Break, so Frag Grenades are the way to go, either by item, which is hard to find, or Mix. Then use Attack Reels, then Tidus should use Entrust on Wakka to go for another Attack Reels.

After defeating Juggernaut or Tanket, your Overdrive gauges will be at 60% if Victor mode was used. Using the Victor mode, pick an enemy in the Monster Arena collection that you can kill easily, let's say a Besaid Dingo to fill up the overdrive gauges to 100%, then defeat Juggernaut or Tanket again with the same. This is also the same strategy that is used to farm HP Spheres since Ironclad is armored as well, though it is only if you're going for Break HP Limit of up to 99,999 HP. (You need 333 +300 HP Spheres to max HP for all the characters if you remove all the +200 HP Spheres, plus there's a strategy to defeat the Dark Aeons and Penance without using Break HP Limit.)

Now you can max the other stats and can deal 99,999 physical damage. Time to max the other stat spheres. For the other stat spheres which are Evasion, Accuracy and Agility, they're hard to hit with normal attacks, so Overdrives are the only reliable way to hit them. Attack Reels/Blitz Ace will easily defeat them. Then do the same trick in filling up the overdrive gauges using Victor mode.

Optional stats to max
MP spheres are optional because the whole sphere grid has enough MP Spheres to reach 999 MP. Though if you're going for Break HP Limit and you try to clear the +1, +2 and +3 stat spheres, +200 HP and +20 MP spheres using Clear Spheres to have space for the HP Spheres, you can get a little bit of them. 18 MP Spheres are what you need since there are 7 +40 MP Spheres already.

Another optional stat to max is Magic and the monster that drop this, Jumbo Flan, is immune to physical attacks, and has Auto-Reflect on, so only Ultima works against this guy directly. There is a fast way to defeat Jumbo Flan using Anima. However, you should make Yuna as strong as your three main characters you use in Monster Arena (Tidus, Wakka, Rikku) as well to do so. Making Yuna strong will effectively make the aeons strong as well. Use the Don Tonberry trick to max her easily. Anima has a high Magic Stat especially when Yuna is maxed so that's why she can hurt Jumbo Flan the most. The abilities you need to give to Anima are these: Lancet, Doublecast, Reflect, Slow, Haste, Flare. Also, make sure Anima has around 800 MP before doing this. You can increase her mana by giving her Mana Spheres in Attributes.

Now, onto the battle. Summon Anima, then cast Haste immediately to get turns, then cast Reflect (this is important), then cast Slow on yourself (so you effectively Slow Jumbo Flan because of Reflect). Then you cast about 7 Doublecasts of Flare on Anima (since she would have Reflect on and it will be directed to Jumbo Flan). If you ran out of mana, you can cast Lancet on Jumbo Flan, it doesn't reflect. Then try to overkill Jumbo Flan using Pain.

Maxing out the Luck Stat
Now for maxing Luck. This stat is very hard to max because there is no such thing as Fortune Distillers. But the advantage of maxing Luck is it is Evasion and Accuracy combined. Effectively, 255 Luck = 255 Accuracy + 255 Evasion, plus the upside of physical attacks always a critical hit. Also make sure you have maxed Strength, Defense, and Magic Defense already to 255 before even attempting to max this stat. You can max the other stats because there are respective distillers that they can use on Kottos and gain 20 of them easily (40 if you overkill). So you need Luck Spheres, and Fortune Spheres to really max this stat, and unfortunately, the enemies you would have to defeat to get them are of the Original Creations (a way stronger version of the main storyline bosses), particularly Greater Sphere for Luck Spheres, and Earth Eater for Fortune Spheres.

For Greater Sphere, a perfect Attack Reels and Blitz Ace or two times Attack Reels via Entrusting Wakka will do the trick of defeating it. Then fill the overdrive gauges with Victor mode by defeating an easy monster like Besaid Dingo. You need 60 Luck Spheres because there are 4 +4 Luck Spheres already existing in the Sphere Grid.

The harder and longer part of maxing Luck is defeating Earth Eater repeatedly. There is a way to defeat Earth Eater quickly, either by Tidus or Wakka, but you must have these things:

Overdrive mode: Loner Earth Eater armor: Deathproof, Auto-Shell, Auto-Haste, Auto-Regen

To get Loner mode, simply kill off the other two characters in Besaid and just defend until you get the mode. (Note: you cannot gain Overdrive modes in Monster Arena.)

You can Bribe Wraith which is a monster in Inside Sin and Omega Dungeon for 60 Farplane Winds for Deathproof for 445,000 gil. You can get 4 Lunar Curtains by stealing from Juggernaut and you need 80 for Auto-Shell. For Auto-Haste, you can Bribe Machea which is an Omega Dungeon monster to get 60 Chocobo Wing for 360,000 gil and you need 80 for Auto-Haste. You need to Overkill Kottos 2 times for 80 Healing Springs which are needed for Auto-Regen. Note: In the International version (PAL, Remaster), you can bribe for half of the prices to get half as much items. Example, you can potentially bribe Machea 180,000 gil to get 30 Chocobo Wings instead of the usual 360,000 gil. If the bribe didn't register yet, give it 1 gil per turn until it goes away.

Now you have the overdrive mode Loner and the Earth Eater armor, here's the strategy to kill him fast with either Tidus or Wakka. Make sure you set the overdrive Mode to Loner before fighting Earth Eater. Hit the Earth Eater 2 times so it plops down (the stance where it does not counterattack with instant death, but instead counterattack with Flare) and kill off the other 2 characters. Then, defend until the overdrive gauge is full because of Loner mode and use Slice and Dice for Tidus or Attack Reels for Wakka. It takes about 3 Slice and Dices and a couple of attacks, or 2 perfect Attack Reels to defeat Earth Eater after the 2 initial attacks to make him plop down. Rinse and repeat until you get lots of Fortune Spheres to activate those Luck Spheres.

Prizes
You receive specific prizes for unlocking Area, Species, and Original Creations:

Area:
 * Stratoavis — Stamina Tonic x99
 * Malboro Menace — Poison Fang x99
 * Kottos — Soul Spring x99
 * Coeurlregina — Candle of Life x99
 * Jormungand — Petrify Grenade x99
 * Cactuar King — Chocobo Wing x99
 * Espada — Shining Gem x60
 * Abyss Worm — Shadow Gem x99
 * Chimerageist — Farplane Wind x60
 * Don Tonberry — Silver Hourglass x40
 * Catoblepas — Blossom Crown
 * Abaddon — Lunar Curtain x99
 * Vorban — Designer Wallet x60

Species:
 * Fenrir — Chocobo Feather x99
 * Ornitholestes — Stamina Spring x99
 * Pteryx — Mega Phoenix x99
 * Hornet — Mana Tonic x60
 * Vidatu — Mana Spring x99
 * One-Eye — Stamina Tablet x60
 * Jumbo Flan — Twin Stars x60
 * Nega Elemental — Star Curtain x99
 * Tanket — Gold Hourglass x99
 * Fafnir — Purifying Salt x99
 * Sleep Sprout — Healing Spring x99
 * Bomb King — Turbo Ether x60
 * Juggernaut — Light Curtain x99
 * Ironclad — Mana Tablet x60

Original:
 * Earth Eater — Three Stars x60
 * Greater Sphere — Supreme Gem x60
 * Catastrophe — Door to Tomorrow x99
 * Th'uban — Gambler's Spirit x99
 * Neslug — Winning Formula x99
 * Ultima Buster — Dark Matter x99
 * Shinryu — Megalixir x30
 * Nemesis — Master Sphere x10