Monster Arena

The Monster Arena is a battle arena in Final Fantasy X, situated in the Calm Lands. The Monster Arena is used to store fiends caught during the game. This is done by defeating the monster while using weapons with the Capture special ability, which can only be purchased here.

Lord Mi'ihen founded the Monster Arena 800 years prior to Final Fantasy X as a training facility for the Crusaders. The owner of the Monster Arena in Final Fantasy X is the unsent Trema, who has the unique ability to reconstitute pyreflies into fiends.

In Final Fantasy X-2 the Monster Arena becomes Clasko's Chocobo Ranch.

Profile
Once the monsters are caught they can be battled at any time within the arena for a fee. If certain conditions are met new creations are bred and can be fought. As new monsters are bred, the owner rewards the party with special, and often rare, items. For each new creation the first battle is free, but any fight after costs. The most expensive battle is against Nemesis, costing 25,000 gil each time. Within the arena, the player cannot get a Game Over after defeat: they simply return to the entrance and can heal, and then try again.

If the player has 8,000 gil or more they can fight Fenrir for free; no matter what the result is, the player won't lose any money.

A lot of the Monster Arena monsters' equipment drops are semi-fixed. Some monsters, including all original creations except Neslug, drop equipment that provides a 6% critical hit chance bonus instead of the usual 3% (this is relevant to weapons and armors, but only to attacks that deal physical damage).

Monster Directory
In the monster directory there are 13 different sections. These are the different areas in which monsters can be found. The areas and monsters in them are shown below.

Some monsters appear in more than one area, but for capturing purposes they count towards the same area regardless of where they were found. For example, a Nidhogg captured on Mt. Gagazet still counts towards Cavern of the Stolen Fayth. In most (but not all) such cases, the fiend counts towards the first area where it can appear.

Besaid

 * Dingo
 * Condor
 * Water Flan

Kilika

 * Dinonix
 * Killer Bee
 * Yellow Element
 * Ragora

Mi'ihen Highroad

 * Mi'ihen Fang
 * Ipiria
 * Floating Eye
 * White Element
 * Raldo
 * Vouivre
 * Bomb
 * Dual Horn

The following fiends also appear in Mi'ihen Highroad, but count towards other areas for capturing purposes:
 * Thunder Flan (Mushroom Rock Road)

Mushroom Rock Road

 * Raptor
 * Gandarewa
 * Thunder Flan
 * Red Element
 * Lamashtu
 * Funguar
 * Garuda

Djose Road
(Comprises Djose Highroad and Moonflow)
 * Garm
 * Simurgh
 * Bite Bug
 * Snow Flan
 * Bunyip
 * Basilisk
 * Ochu

The following fiends also appear in Djose, but count towards other areas for capturing purposes:
 * Raptor (Mushroom Rock Road)
 * Gandarewa (Mushroom Rock Road)
 * Lamashtu (Mushroom Rock Road)
 * Funguar (Mushroom Rock Road)

Thunder Plains

 * Melusine
 * Aerouge
 * Buer
 * Gold Element
 * Kusariqqu
 * Larva
 * Iron Giant
 * Qactuar

Macalania
(Comprises of Macalania Woods and Lake Macalania)
 * Snow Wolf
 * Iguion
 * Wasp
 * Evil Eye
 * Ice Flan
 * Blue Element
 * Murussu
 * Mafdet
 * Xiphos
 * Chimera

Bikanel

 * Sand Wolf
 * Alcyone
 * Mushussu
 * Zu
 * Sand Worm
 * Cactuar

Calm Lands

 * Skoll
 * Nebiros
 * Flame Flan
 * Shred
 * Anacondaur
 * Ogre
 * Coeurl
 * Chimera Brain
 * Malboro

Stolen Fayth Cavern
This category is called "Sunken Cave" in English language releases prior to the HD version.
 * Yowie
 * Imp
 * Dark Element
 * Nidhogg
 * Thorn
 * Valaha
 * Epaaj
 * Ghost
 * Tonberry

The following fiends also appear in Stolen Fayth Cavern, but count towards other areas for capturing purposes:
 * Coeurl (Calm Lands)
 * Malboro (Calm Lands)

Mt. Gagazet

 * Bandersnatch
 * Ahriman
 * Dark Flan
 * Grenade
 * Grat
 * Grendel
 * Bashura
 * Mandragora
 * Behemoth
 * Splasher
 * Achelous
 * Maelspike

The following fiends also appear in Mt, Gagazet, but count towards other areas for capturing purposes:
 * Imp (Stolen Fayth Cavern)
 * Nidhogg (Stolen Fayth Cavern)

Inside Sin

 * Exoray
 * Wraith
 * Gemini (blue)
 * Gemini (red)
 * Demonolith
 * Great Malboro
 * Barbatos
 * Adamantoise
 * Behemoth King

The following fiends also appear Inside Sin, but count towards other areas for capturing purposes:
 * Ahriman (Mt. Gagazet)
 * Varuna (Omega Ruins) (only past point of no return in "The Nucleus")

Omega Dungeon

 * Zaurus
 * Floating Death
 * Black Element
 * Halma
 * Puroboros
 * Spirit
 * Machea
 * Master Coeurl
 * Master Tonberry
 * Varuna

The following fiends also appear in Omega Ruins, but count towards other areas for capturing purposes:
 * Wraith (Inside Sin)
 * Gemini (blue) (Inside Sin)
 * Gemini (red) (Inside Sin)
 * Demonolith (Inside Sin)
 * Great Malboro (Inside Sin)
 * Adamantoise (Inside Sin)

Special Monsters
Once certain requirements have been met new monsters can be unlocked.

There are three extra groups in which the unlocked monsters are in:
 * Area Conquest
 * Species Conquest
 * Original

Items

 * Nirvana (reopen the Monster Arena, capture one of each fiend in Calm Lands, Celestial Mirror required)
 * Blossom Crown (capture one of each fiend in Mt. Gagazet)
 * Mars Sigil (breed ten Area Conquest or Species Conquests monsters. Can be any combination of the two)

Musical themes
The theme that plays at the Monster Arena is called "Bravely Forward".

In the music player of Final Fantasy VI Advance, the last track of the list called "Fanfare 2" is a remix of "Bravely Forward".

Trivia

 * There is a moving statue of an Anacondaur and three Gemini swords around the entrance to the arena. If the statue is investigated in Final Fantasy X, subtitles will say "It's alive...".