First Battle
Aqua travels to Radiant Garden in search of Terra only to be faced with the possessed
version of her old friend last faced in Terra's scenario at the Keyblade Graveyard.
Terra-Xehanort will use a moveset very similar to that battle, but since Aqua's fighting
style is different than Terra's, a slightly different strategy should be followed. Aqua
has access to both D-Links and Command Styles, as well as Shotlocks. The player should
make full use of these special abilities whenever possible.
It is recommended that the player Wheel Roll away from the boss and use the Detona Square
ability. Terra-Xehanort will most likely dash in the player's direction surrounded in
darkness as he did in his battle with the Lingering Sentiment, but he will be damaged by
the mines, his attack interrupted and opening him to more damage. Once Terra-Xehanort is
back on his feet, however, the player should follow a hit-and-run strategy, bombarding the
boss with magic rather than physical attacks and either running or Wheel Rolling away
immediately afterwards. The player can also use Reflect to defend against Dark Volley,
also using a Guard and Counter Blast combo to prevent damage from most attacks and still
deal damage. Terra-Xehanort will summon rock pillars around him if the player is at close
range, so use caution when attempting a combo that involves linking defense to a physical
attack that only works at close range. As Terra-Xehanort's HP starts to dwindle, he will
gain access to the Dark Impulse Command Style. He also may use Curaga to restore health,
thus increasing the length of the battle.
In terms of fighting Terra-Xehanort as Aqua, the player should favor magic, as her
physical attacks are relatively weak. While it is quite possible to go through the entire
battle without using a D-Link, Command Style, or Shotlock, they will certainly make the
battle easier. So long as the player uses patience when fighting this boss, he should not
be a challenge.
Second Battle
Terra-Xehanort's great rage causes a dark symbiote known as the Guardian  to spawn behind
him. He then uses this creature to do much of the fighting during his second battle with
Aqua for him. The Guardian will use many powerful attacks, and Terra-Xehanort can still
attack with the fast-paced physical combo from previous battles, so use caution. As with
the last battle, Aqua can use Command Styles, Shotlocks, and D-Links.
In early stages of the battle, the Guardian will vanish from behind Terra-Xehanort and
begin to strike from underneath Aqua. Chain consecutive Wheel Rolls together to avoid this
attack, or the Guardian will grab Aqua and slam her into the ground to deal heavy damage.
The Guardian will follow Aqua as she Wheel Rolls, but the attack will always have a high
chance of missing. Once it returns to Terra-Xehanort, strike the boss with the most
powerful magic possible and continue with a hit-and-run strategy. The Guardian may
sometimes attempt to shoot twin energy balls at Aqua. Wheel Roll out of the way to avoid
these projectiles, as they can blind players and render Shotlocks useless. Wheel Roll can
also be used to dodge when the Guardian sends dual waves of energy in Aqua's direction. If
Terra-Xehanort ever attempts a physical attack, knock him away with a Guard and Counter
Blast combo. This combo can also be used if the Guardian ever attempts to punch Aqua with
its mighty fist. If the Guardian ever latches onto Aqua, immediately break away by
pressing Circle. The boss and his symbiote will repeat these attacks until much of their
HP is depleted.
Once enough HP has been depleted from Terra-Xehanort, Aqua will be transported to a realm
of light. Terra-Xehanort will stand in the middle of the area, immobile and non-offensive,
now bearing the appearance of Terra while the Guardian continues to attack by firing twin
energy spheres. Wheel Roll over to Terra-Xehanort's location, and enter the pool of light
surrounding him by pressing Square. At the right moment, press Circle to team up with
Terra/Xehanort to strike the Guardian with light. This attack will deal enough damage that
if a certain amount of HP remains, it will immediately KO the boss. If not, it will at
least deplete great amounts of HP, Aqua transported back to the main battlefield and the
attack process beginning from square one. It is important to know that if one strikes
Terra-Xehanort rather than using the finishing command, then Aqua will be transported to
the normal battlefield again, as well.
This incarnation of Terra-Xehanort is not difficult to defeat. So long as the player makes
full use of the Wheel Roll ability to dodge attacks, they should take very little damage.
The player must remember to keep at a constant hit-and-run strategy, utilizing magic
rather than physical attacks, and only using the Guard and Counter Blast combo when a
physical attack from the opponent must be defended against. The player can now heal with
Curaga and without the fear of Terra-Xehanort healing as well, meaning this battle can go
relatively quickly. The player should also try their best to activate the finishing
command in the light realm. If this strategy is followed, then defeating Terra-Xehanort
will be child's play. Terra-Xehanort's fall will also represent the completion of the
Final Episode, unlocking more rewards in the game.