Best Boss Battle Music

I vote for... 
  

@H2Oyea: I second that, and would like to add

and

Last time I got into an argument with my boss the only music I heard was the sweet sound of regret.

That or the last boss in Sonic 2.

Both examples ended with me running from a burning building.

3rd Megami Tensei related vote right here: 
 
  

Wait, isn't The Battle for Everyone's Souls the regular battle theme? Anyway, I honestly can't pick a single track, simply because there are so many awesome tracks out there.

@H2Oyea: Thanks for reminding me why I love Persona 3.

This may be the weakest Mario game but this music got me fucking pumped every time I fought a boss:

* sigh* You do realize that I listen to shitloads of video game music, right? How can you possibly expect me to pick out a small subset of songs?

@PKHilson said:

3rd Megami Tensei related vote right here:

that's not even the best boss battle music from nocturne you scrub!

also

Here's the "best" boss battle music.

@FluxWaveZ: 
 
How many people delve into the obscure shit? How many people play games like Cocoron, Faria, Valis II, Panzer Bandit, Evil Zone, Romancing SaGa, and a bunch of other games?

Blue dragon: Eternity. When I first heard this I was dumbfounded by awful singing. But then half and hour later, I was almost singing along. So manly

Xenosaga 3: Hepatica. All three xenosaga games have had great music. But as for why this boss battle song sticks out the most, just listen to it.

@FluxWaveZ:   I was focusing more on the sheer volume of selections I have compared to a lot of people.

Another Demons Souls. This game had some amazing music.

Tower Knight

And the final boss for the first Xenosaga. Great game.

@H2Oyea: I second that, and would like to add

and

This still gives me the creeps today

I still get chills every time I hear this music and the memories of that fateful day flow back. The first time I made it to that boss and this music came on is hands down one of my most memorable moments of ever playing video games. It took so much effort to work my way towards being a high enough level to tackle that boss, and when I finally did it was just such an Epic battle to behold. I remember that whole event being larger then life for me at the time.

 :)

@McGhee_the_Insomniac said:

Here's the "best" boss battle music.

YES.

There are tons and tons of Boss Battle songs that I love.  Here is one of my favorites that came out last year to be a little recent.
 
  

Really? No one has said this one yet?

Megaman 2 has an awesome boss battle theme :) 
 
  

@RE_Player92: I will see your Sunshine and raise you a galaxy

And as runner up

@Laketown said:

@PKHilson said:

3rd Megami Tensei related vote right here:

that's not even the best boss battle music from nocturne you scrub!

also

I'd like to add one more. Can't leave Dante out:

I'm probably alone on this but I always loved the final battle theme on Paper Mario.  

The Kirby games have always had some good boss themes:

  Most memorable one for me:

@crusader8463: That's the end theme (the one what rolls with the credits). This is the final boss music:

@falco_eagle: i like this one from thousand year door

Some under appreciated fantastic boss music. 
  

Another neat one: