Best final boss battle music ever

Okay, this topic is simple. Just post your favorite final boss battle music. There are some really epic tunes out there saved for the final boss battle in a video game. But I think out of all the ones I've heard, nothing can beat this amazing track, which is the song from the final boss of Mario and Luigi: Bowser's Inside Story.
 
  

Not exactly the final boss, but I'd call it the big mid-way boss. 
 
  

Speed Buster's theme from No More Heroes. She's not the end boss though ;)
  

Done and done.
 

one winged angel ff7

I've listened to all but the Persona 4 one, so I want to wrap up my thoughts before continuing.
 
The tracks from Chrono Trigger and Persona 3 are my favorites so far besides the one I posted.
 
The Donkey Kong Country one is a little weird.
 
I beat Shadow of the Colossus personally. That is a great track from that game.
 
And No More Heroes was pretty good as well.
 
And I knew someone would say One Winged Angel. I knew it.
 
Now to listen to more of them.

At first I was all like    

" Done and done.
 

"

Yes Final Fantasy VI Kefka battle is probably the most epic boss song ever.

I love these:

 

Man that Persona 4 song is reeeaally good.

While all fantastic contributions so far, I'm afraid to tell all of you guys that  YOU ARE DEAD WRONG. 
 
    

Not the final boss battle, but might as well be: 

Some has already been mentioned, Dancing mad, Bayonetta's boss themes (I liked Jeanne's boss themes way more however), P3's final boss theme. I liked Eternal Sonata's use of The Revolutionary Étude, there're a lot great music in that game as well. 

No Contest.  Truly Epic Final Battle Music.
 

"  

  My absolute favourite, total fan service but I love it. "

Someone's already posted P3 and P4, but Shoji Meguro knows how to make great boss music, especially this one (the best part is that it ties with the main theme, Eternal Throne)
 
 

  Might not hold up quite as well now, but I still get a chill remembering how many times she handed me my ass back in the day.

" Done and done.
 

"

It was already posted, but the Metal Gear Solid 4 ending.  I loved how it switched from the different songs in the series as the fight progressed.

Well the MGS4 ending is probably the best but I do enjoy this tune, so rocking.
 
  

so you can post more than one song huh? ok then 
 
http://www.youtube.com/watch?v=FGUGAHTPcak

http://www.youtube.com/watch?v=_70vdVvb9yo  

http://www.youtube.com/watch?v=BIZOA4M2_hM   
 

http://www.youtube.com/watch?v=nSdb2ghzK2o  
 

http://www.youtube.com/watch?v=Vv-ddnBsOr8

 
some are not exactly final bosses (more like before the FINAL boss) but they are close enough   

There is a distinct lack of "Divine identity" in this thread. I aim to fix that 

" Yes Final Fantasy VI Kefka battle is probably the most epic boss song ever. "

As much as I want to contribute to this thread, this isn't the type of thread that is liked on these forums.. It's just a bunch of youtube embeds on every page. While I don't think it's such a big deal, the mods and staff tend to frown on this stuff. So I'll try to be the good guy here and say that you shouldn't create threads like this in the future.

" As much as I want to contribute to this thread, this isn't the type of thread that is liked on these forums.. It's just a bunch of youtube embeds on every page. While I don't think it's such a big deal, the mods and staff tend to frown on this stuff. So I'll try to be the good guy here and say that you shouldn't create threads like this in the future. "

The three stand-out ones are Persona 4, Shadow of the Colossus and ICO. All have been already covered, so I won't crowd the forums.

 Everybody has already posted everything that I was going to say, but I'll throw some Mega Man tracks out there.