Fiend Listing - Monster Arena
Ultima Buster can be unlocked in the Monster Arena by capturing five of each fiend across all of Spira.
You should consider power leveling your characters and obtaining the Celestial Weapons. Check out the Advanced section of the Tips and Tricks for more information. Properly leveled characters with their strongest weapons is a necessity for this battle.
Using spells that hit the head, the arms and the body all at the same time are incredibly effective. This includes spells like Ultima. Alternatively, you can have Yuna summon her Aeons to assist with the battle.
|Sensor||“Immune to sensors.”|
|Scan||“Immune to scans.”|