Here it is, the last fight of the ReMind campaign and easily the most well designed fight in it. They basically took the Armored Xehanort fight from the story and fixed all of the issues people had with it. Changing the arena from the mess it was before to the final boss arena fixed most issues but they also increased the range of his attacks which makes guarding way more consistant. Also helps that Kairi has barrier.
Speaking of Kairi, she is infinitely better then either Riku or Aqua but whether she is better then Roxas is debatable. They share many of the same abilities but where as Roxas is incredibly fast, Kairi has overall more options. Her keyblade teleport usually deals with her lack of speed in most cases.
The fight itself is actually fairly easy, just take it slow and wait for his attacks to finish. Kairi is similar to Roxas in that she can chain moves together to give herself very long periods of invincibility and so you exploit openings extremely easy in this fight. In particular, Xehanort's fire pillar almost always leaves him open so if you quickly slide into a keyblade throw, Kairi will just i-frame through everything.
You also don't want to hit Xehanort's Revenge Value because otherwise he will gain super armor and do multiple attacks in a row that can't be interrupted. So if you anticipate that fact, you can end your combos early which will often leave him hanging for a second or two before doing another attack that is easy to count.
Next the first phase DM. This move is pretty simple, just run around the edge and dodge the pillars. He will always spawn 4 pillars in front of before going to the next part. This is the only kind of unfair part of the fight. He will usually throw 3 sets are fireballs at you, attack, 2 more sets, attack, 2 more, attack and then the finisher. The problem as seen in this video is that he will sometimes delay throwing the second set of fireballs in the first group with no indicator and you kind of have to get lucky.
After getting him down to half, the second phase starts which is really not all that different. He has new attacks but they more or less function the same, they are just bigger or shift your gravity in weird ways.
The DM in this phase is consistent so if you know how to dodge, you can dodge it every time. I highly recommend going into the DM with Seven Wishes on standby though. It's not required to dodge the DM but it's a useful safety net for when you are about to get caught by the meteors.
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