You are the final boss

[Muffin]

[Mr.PowPow]

1. "Lets see who can splooge first!"
2.  Pow's fapping stadium
3. 

[Apokura]

"ZETTA DEAD!"
A classroom on fire, floating in the sky, with an elevated platform for me to stand.

Theme was chosen because I can't stop listening to it. Also you may have noted I'm not very creative, specially on quick-thinking situations.

[Reisyukaku]

1. 死ねよ! (Drop dead!)
2. Scarlet Devil Mansion
3.

Kinda in a weird touhou mood I guess.. it can't be helped. :I

[Arikado]

I think this could be its own thread.
---------------------
1. "Too late! Now you're dead!"
2. A power plant
3. http://www.youtube.com/watch?v=Wr6xkAofxSc

[senpai_FisT]

1. *Yawn*
2. In a twisted, distorted realm resembling a womb.
3.

[NekoJonez]

I think this could be its own thread.

Done.

1) Meh, let's skip the genericness and go in your grave already.
2) In a bad-ass open spot/cave-ish place.
3)

[PriomBlazer]

I have been expecting you....Tell me what do you fight for?

Edge of the highest cliff of the world

[Kiss x Miz]

"Since you managed to get through this whole game without dying, you must be incredibly strong. But I bet you can't catch up to me when I'm running away!"

Abandoned highway

http://iwantmoar.com/3937

[Arikado]

1. "So you've come... I've waited a long time for a worthy opponent... It all ends here."
2. Castle, top floor
3. http://www.youtube.com/watch?v=xdvrsmf3gOI