Best boss theme in the game?

There is:

-Enemy Attack
-Otherworld
-Summoned Beast Battle
-Challenge
-Seymour Battle Theme
-Attack
-Decisive Battle

My favorite is Summoned Beast Battle. The battle against Penance is so epic.

Oh trout. Like, all of them. Except for the typical boss theme.

Summoned Beast Battle and Decisive Battle tie for number one if I have to narrow it down.

Seymour Battle Theme. The first time I heard it I thought "this sounds like it's from an older game".

That one boss theme you have listed as Otherworld is actually Overworld.

Otherworld was my favorite.

edit: just in case someone couldn't tell, I'm saying Overworld it my favorite.

OP has the title correct, it's Otherworld. Unless the song you're talking about isn't the Jecht theme?

Apparently they are the same song. Huh, what do you know. I wonder which title is the original, I know in Dissidia they call it overworld.

I just checked and in Dissidia 012 it's called 'Otherworld'.

Really? I'm looking at mine, and it says Overworld. How weird is that?

Maybe it's different in each version or something.

I can't decide between Challenge and Seymour Battle. FFX music just rules.