Kingdom Hearts II Weird Reaction Command for the Final Xenmas Fight?

I found out that there is an Reaction Command for him at the start! Did anyone else find this out?

 

I have! It is tricky to get to, you have to start attacking him as soon as the battle starts! But you lose a lot of HP from it, since it starts out with Sora being attacked, so I wouldn't reccommend it.

 

I personally like it because you get in abunch of free hits and it's a small price for alittle of your health

 

It's not that weird and you don't lose too much health if you just use the Reaction Command to avoid most of them.

It's really cool to watch when you swing the camera around though XD