KH3 Data Battles: Master Xehanort 

KH3 ReMind Data Battles Finale! Master Xehanort
How many times do we have to teach you this lesson, Old Man?! Master Xehanort was definitely one of the most difficult of the 13, it's hard to decide between him and Xion. His DM is brutal, I fumbled my way through it using any bits of invincibility I could manage and I think it was just luck. But it's definitely the best way to (mostly) send off the main villain of the first arc of Kingdom Hearts.
Now I just have Yozora to go. I took a couple of attempts last night after this fight and... Hoo boy, this might take a while.