So this fight ended before I'd taken him down to zero health - I hear he has a doom attack he's meant to unleash but I didn't even experience it. I was just fighting him (and having a pretty hard time doing so despite the fact I was worried I had over levelled) and a little after his transformation, blam, cutscene and my crystarium has expanded... Anyone else have this happen? Can't say I'm too annoyed as he kicked my ass the first time but that was a little anticlimatic 

No sir did not happen to me, quite weird.

That is what happened to me.  The first time I fought him he kicked my ass with whatever that super attack was and then the second time I staggered him, switched to Odin and by the time I used Zanetsuken the fight was over, I thought he still had about 1/3 of a bar left but I wasn't going to question it.

" That is what happened to me.  The first time I fought him he kicked my ass with whatever that super attack was and then the second time I staggered him, switched to Odin and by the time I used Zanetsuken the fight was over, I thought he still had about 1/3 of a bar left but I wasn't going to question it. "

How odd. I wish I could say the same, this guy was a man-whore to fight.

Worst boss fight ever, took me like 20X getting defeated and stuff. I died that that boss at 90%, I just used odin and won it that way, I couldn't get a second stagger.

i had the doom happen to me...but i went ahead and retried the battle since i was getting destroyed.

" @Vitor: I'm just being an idiot and remembering things wrong. I'm actually on the chapter 11, not 10, and it's the 11 boss that I'm afraid of.  The worst part is, the same thing that the OP is talking about happened to me, and I didn't even realise. I had a party of Lightning/Hope/Fang, and everytime I would fight that guy, I would get him to about 15% and then he would do a launch attack on Lightning and kill her. The I switched to all ladies, and I got him staggered, and then the fight ended. I'm sure I didn't get any more than 50% of his health. "