Dark Ifrit
Dark Ifrit is one of the Dark Aeons and spawns after you have obtained the airship Fahrenheit. There are a few steps that you must take to initiate the battle against Dark Ifrit, so you wouldn’t normally encounter him randomly.
Note that the Dark Aeons only appear in the International, PAL, and HD Remaster versions of Final Fantasy X. They are not present in the original North American PlayStation 2 release.
Location
This Dark Aeon resides on Bikanel Island in the Sanubia Desert. Travel to the north side of the desert, where the Al Bhed town of ‘Home’ used to be before it was destroyed, and speak to the Al Bhed woman standing nearby. The battle will commence after a brief exchange of dialog.
Battle Preparation
Each of the Dark Aeons, including Dark Ifrit, is considered a superboss, and they are some of the strongest enemies that you can fight in the game. As such, you will need to ensure that your party is fully leveled, has their best weapons, and has their stats maximized as much as possible. Refer to the Advanced area of the Tips and Tricks section for additional details.
Tips and Tricks
Customizing strong weapons and armor, quickly leveling your characters, maximizing their stats, and other helpful endgame tips and tricks.
Dark Ifrit Stats
HP: 1,400,000
Overkill: 99,999
AP: 20,000 (30,000 for an Overkill)
Elemental Affinities: Absorbs fire damage, halves ice damage, immune to lightning and water damage
Immune to Sensor
Battle Strategy
Dark Ifrit is not too difficult to defeat compared to some of the other Dark Aeons. Similar to the battle against Dark Valefor, you need to be prepared to deal with his Overdrive attack, which will instantly KO your party members. You can either have Yuna summon an Aeon just before the attack or have your party members cast 
Auto-Life on one another.
Items and Rewards
You can Steal the following items during the battle:
Mega Phoenix (x2) (common)
Elixir (rare)
And Dark Ifrit will drop the following items when it is defeated:
Dark Matter (common)
Master Sphere (rare)
Dark Ifrit will also always drop a weapon or piece of armor with three or four ability slots. His weapons can include abilities such as Firestrike and Break Damage Limit, while his armor can include Fire Eater, Break HP Limit, and Ribbon.
