Game:Master Xehanort

Master Xehanort appears as a boss in Kingdom Hearts Birth by Sleep. In Terra's story, he is fought twice in a row. The first fight is against both Master Xehanort and Vanitas, but the fight is ended prematurely, and the second fight is the penultimate fight of Terra's story: a one-on-one duel between Terra and Master Xehanort.

Master Xehanort serves as the final boss of Kingdom Hearts III, where he is fought by Sora and the party in Scala ad Caelum. He is fought twice in a row. The first fight is against him in his armored form and the second fight is against him while he wields the legendary χ-blade. A data replica of him is also a optional boss in Kingdom Hearts III Re Mind.

Master Xehanort serves as the final boss of Kingdom Hearts Melody of Memory, a memory created from within Kairi's heart, where he is fought by Sora.

First Battle
Terra will fight both Master Xehanort and Vanitas two-on-one. Vanitas should be the primary target as Xehanort will mostly dodge and keep a distance from Terra. Xehanort isn't very difficult and after sustaining minor damage, the battle will end.

Second Battle
The second battle is the true battle against Master Xehanort. Like the previous battle, Xehanort will keep a distance, but now has access to wide-ranged magic spells. All of his attacks, including magic-based ones, can be dodged with the right timing. Cure commands and Shotlocks ease this battle significantly.

Armored Xehanort
Sora should have several Elixirs equipped, with Curaga set as a shortcut. Stocking a Kupo Coin is also helpful. The Ultima Weapon will be the most efficient Keyblade to have equipped, but Hero's Origin, Shooting Star, Crystal Snow, Hunny Spout, and Wheel of Fate are also useful for their Formchanges.

After the Replica Xehanorts are defeated, Master Xehanort absorbs them and dons his new Keyblade Armor, then reshapes the plaza into a closed chamber to initiate the beginning phase. Keeping track of Xehanort's position can be difficult due to his speed and the size of the arena. Airstepping can be used to stay close to Xehanort, but can sometimes result in accidentally leaping to one of the flagpoles dotting the arena. Speedy or homing attacks such as Flare Force, Double Arrowguns, Hunny Blasters, Highwind, and Blizzard Blades will be useful for dealing damage, while the defensive Counter Shield can be used for its Wrathful Fist reprisal.

After getting his health down to a certain point, Xehanort will move the battle underwater, initiating the middle phase. As formchanges cannot be used underwater, Sora will not have access to Rage Form.

Finally, after reducing his health even lower, Xehanort will move the battle to the stormy skies above the city, initiating the closing phase. Sora will be alone during this phase, meaning that Donald Duck and Goofy cannot heal or support him. Sora should focus on dodging Xehanort's attacks and healing when necessary.

Final Battle
Like the previous battle, Sora should equip Elixirs and a Kupo Coin for healing, and the Ultima Weapon for offense.

Armed with the legendary χ-blade, Xehanort has an arsenal of powerful attacks at his disposal. Sora should focus on defense, as "Knock Down" will prevent him from landing attacks easily. Sora should also be close to Xehanort as much as possibly to prepare for "Call Calamity". While Xehanort uses it occasionally, it is his most dangerous attack and even getting hit by blizzaza can cause devastating damage to Sora. It comes out fast and if Sora is too far when Xehanort throws the χ-blade, it will halt in front of him and activate the -za spell sequence immediately meaning Sora has no choice but to withstand it. The only way to avoid this is to stay very close to Xehanort to properly block the χ-blade throw. Successfully blocking the attack allows for Sora to follow up with a reprisal. Reprisals such Counter Blast and Wrathful Flurry are useful for injecting damage, as well as speedy Formchanges like, Blizzard Blades, Twin Yo-Yos, and Nano Arms, or homing techniques like Flare Force.

After losing seven and a half health bars, Xehanort will initiate the second phase of the battle by summoning Kingdom Hearts via "Ascension", then immediately launch into "Dark Shooting". He will continue employing his earlier techniques, albeit enhanced via "Ascension".

After four more of his health bars are depleted, Xehanort will use the power of Kingdom Hearts to steal Sora's light, forcing him into a version of Rage Form that cannot terminate or use Riskcharge. In order to return to normal, Sora must attack Xehanort to force him to drop orbs of light which both fill the Situation Gauge and restore HP. During this portion, Xehanort cannot be directly damaged, but will continue to use his enhanced attacks. After filling the Situation Gauge, Sora can use "Return to the Light" to attack Xehanort and revert back to normal. Xehanort will respond with "XIII Combo", then continue attacking as normal. During "XIII Combo", Xehanort will send several shadowy clones to attack Sora before shooting an unblockable laser beam. Sora must block the shadows first and dodge just as a laser comes out. I-frames from the reprisals can help as well but during the final part of the barrage, Xehanort will shoot 4 beams before following up with one one larger beam so Sora has no choice but to dodge in that order. If enough time passes without advancing to the final phase, Xehanort will steal Sora's light again, forcing Sora to retrieve it once more.

Once Xehanort is down to 1 HP, Sora can use "Last Ray". However, Xehanort quickly counters and retaliates with a beam of darkness that seemingly kills Sora. Sora can then use "Trinity", ending the fight.

Replica Xehanort
A replica of Master Xehanort in his armor serves as the final boss of the Re Mind scenario. The player can choose to play as Sora with or Kairi with.

If playing as Sora, he should be equipped with some elixirs, Ultima Weapon and/or Oathkeeper/Oblivion.

This version of Armored Xehanort fights exactly like the first Armored Xehanort fight with some extra moves. His Keyblade attacks are augmented by the twelve No Names surrounding him, dealing extra damage. Xehanort can summon flame pillars from either above or below to hurt Sora or Kairi. If Xehanort is summoning a pillar from below, a Recusant's Sigil will spawn before summoning a pillar. If he is summoning a pillar from above, some yellow particles will surround the player and lift them up briefly before the attack. Both of these serve as indicators to dodge or block if Sora is using a form with Barrier or if playing as Kairi. Halfway through the battle, Xehanort's armor will break and he will begin his desperation attack. He will summon several planetoids and break them apart with his Keyblades, causing meteors to rain down on Sora and Kairi. The meteors are unblockable so the player should just dodge roll or slide away.

Occasionally, Xehanort will attempt to attack the player during the meteor rain. Simply block the attacks while trying to avoid the meteors. If playing as Sora, a Link can be used to remain unkillable during the attack. If playing as Kairi, it's best to notice the patter of meteors falling and either constantly slide to places where the meteors haven't fallen yet or slide exactly where a meteor just landed. During the second phase Xehanort will often place mines in the air which will leave an explosion trail leading to the player. After reducing Xehanort's HP to 1, a situation command will appear called Connecting Hearts which acts just like the Last Ray command and is required to end the fight.

Data Rematch
Master Xehanort's data is a recreation of his final boss battle. He retains most of his attacks from the final battle, but this time he can Formchange the χ-blade into a myriad of weapons, such as: a double blade that reduces Sora's maximum HP, a pair of chakrams that stun Sora on impact, a whip that has very long range, spinning bombs that can freeze Sora if they explode, spikes that shoot gold lasers from the sky, and massive aerial cannons that fire large red beams. He often combines the Formchanges with his old attacks.

Many of his slashes now unleash spinning bombs that can be guarded at first but will explode, freezing Sora, and as such must be dodged or blocked and dodged. Xehanort also summons spikes that fire multiple beams of light that will fire exactly where Sora is at and as such, must be dodged right before they hit. Xehanort will also make use of giant cannons he manifests in the air that also track Sora before firing. Dodge the moment the cannons finish charging.

Xehanort always starts the battle with these two attacks:
 * Meteors and lasers: Xehanort fires 2 purple meteors, a third meteor that coincides with unblockable gold lasers, 4 more meteors, and finally a wave of gold lasers. The meteors can be blocked, however the gold lasers cannot. Block the first 2 meteors, dodge the third meteor and the gold lasers simultaneously, block the next 4 meteors, and dodge the wave of gold lasers.
 * χ-blade throw into Grand Magic: Xehanort appears and throws the χ-blade at Sora, casting Blizzaza and freezing him if it connects or hits the ground. Xehanort follows up with Firaza, Thundaza combined with gold lasers, and another Thundaza with gold lasers. The magic and lasers are unblockable, however the thrown χ-blade is blockable if Sora is somewhat close to Xehanort when it's thrown - so when Xehanort appears, run towards him as he winds up the throw for this chance. Blocking the χ-blade reflects it back at Xehanort, cancels the entire magic sequence, and leaves Xehanort open to attack.
 * Outside of the initial sequence, this attack can be anticipated if Xehanort disappears for longer than usual. If that happens, have Sora run towards the edge of the Arena, and Xehanort should appear close enough that Sora can block the χ-blade.

Xehanort then calls upon Kingdom Hearts to flood the arena with a golden light, and pillars of light start to orbit out from the center of the arena. After a moment, Xehanort sends a shockwave towards Sora, followed by a spinning bomb, a set of 2 spinning bombs, and another single spinning bomb. Dodge the shockwave, and block-then-dodge-away from the bombs, as the bombs will explode unless Sora gets away from them quickly. Airstep to Xehanort as he throws the second single bomb for a chance to attack. After Xehanort has received some damage, the golden light on the arena will fade away.

For the remainder of Xehanort's first phase, he may use any of the above attacks, or any of the following additional attacks:
 * Laser combo: 2 waves of gold lasers will appear, followed by a third wave that also has a red laser. Dodge all three.
 * Physical combo 1: Xehanort rushes in for a downward physical strike with the χ-blade, then an uppercut, and finally a downward strike. All 3 strikes can be blocked, and reprisaling as Xehanort finishes the uppercut grants a chance to attack. Alternatively, the uppercut can be dodged, and Sora can strike Xehanort as he finishes it.
 * Physical combo 2: Xehanort rushes in, but does the uppercut first. Block-then-reprisal it, or dodge-then-strike for a chance to attack.
 * Bombs combo: Xehanort throws 6 spinning bombs, one at a time. Dodge each, then airstep to him as he throws the 6th bomb for a chance to attack.
 * Bombs into lasers: Xehanort throws one bomb, followed by rushing in for an uppercut physical strike at the same time as gold lasers spawn. Dodge the bomb, then block the uppercut and immediately reprisal for a chance to attack. The invulnerability granted by the reprisal will protect Sora from the gold lasers. Alternatively, dodge the lasers and the uppercut, then strike Xehanort for an opening.
 * Red laser combo: Xehanort fires 6 red lasers, one by one. He re-appears in the center of the arena after the second fires, but disappears soon after the fourth fires. Dodge the first three red lasers, then airstep to Xehanort right as the 4th fires for a chance to attack. If Sora airsteps too early and the 4th red laser has not fired yet, strike Xehanort to stagger him, air slide to avoid the 4th red laser, and then airstep back to Xehanort to continue the combo.

At about 7 bars of HP remaining, Xehanort will perform his ultimate attack, summoning a large red emblem and darkening the arena. Various gold and red lasers as well as shadow Xehanorts will attack Sora. Xehanort himself cannot be attacked during this sequence, so focus on surviving.
 * First combo: Gold lasers, then 4 shadow strikes. Dodge the lasers, then block the shadow strikes.
 * Second combo: Gold lasers, 4 shadow strikes, and a shadow wielding the χ-blade will transform it into chakrams, followed by a double-bladed weapon. Note that the chakram strike is blockable (but if it hits, Sora will be stunned), while the double-blade strike is unblockable (plus it will reduce Sora's max HP if it hits).
 * Third combo: Gold lasers, 4 shadow strikes, double-bladed χ-blade, chakrams.
 * Fourth combo: 4 shadow strikes, red laser.
 * Fifth combo: 4 shadow strikes, 2 spinning bombs.
 * Sixth combo: Gold lasers, red laser, 4 shadow strikes.
 * Seventh combo: Gold lasers simultaneous with a shadow strike, 4 shadow strikes, double-bladed χ-blade. Jump then dodge the gold lasers, then block the shadow strikes mid-air, and dodge the double-blade strike.

After Xehanort's ultimate attack concludes, he is in his second phase, and adds the following attacks to his arsenal:
 * Red laser + bomb + double-blade: Xehanort fires a red laser, followed closely by a bomb, and then a double-blade strike. Dodge each of the three, then strike Xehanort right after the double-blade finishes for a chance to attack.
 * χ-blade transformation combo 1: Xehanort attacks with a whip, then chakrams, double-blade twice, chakrams twice, and finally double-blade. The whip and chakrams can be blocked, however the double-blade still cannot be blocked. Strike Xehanort after dodging the last double-blade for a chance to attack.
 * χ-blade transformation combo 2: Chakrams twice, whip, chakrams, double-blade. Strike after dodging the double-blade for a chance to attack.

Trivia

 * In Kingdom Hearts III Re Mind, when getting a Game Over against Master Xehanort's data while he is firing cannons or during his Desperation Move, his Game Over quote will be spoken with the voice of Rutger Hauer, his voice actor from the base game, as opposed to Christopher Lloyd's.