Your favorite VG music.

Pokemon R/S/E - Aqua/Magma Fight
http://www.youtube.com/watch?v=NCRhogAGavI
(I remain that this is the only good thing to result from these three games.)

Persona 4 - I'll Face Myself
http://www.youtube.com/watch?v=V7ErlkQIc4A

Final Fantasy 9 - The Place I'll Return to Someday/A Place to Call Home
http://www.youtube.com/watch?v=rHLBrtpZ5gY&feature=related

...and, by extension, Ipsen's Heritage
http://www.youtube.com/watch?v=I7A-EknJaHA&feature=related

Castlevania: Order of Ecclesia - Dracula's Castle
http://www.youtube.com/watch?v=J1hfIUQqk8w&feature=related

Castlevania (series) - Vampire Killer
http://www.youtube.com/watch?v=0AZ5XZHIDh0
 
Donkey Kong GB: 9-8
http://www.youtube.com/watch?v=qlnAUudJuHU
 
The Mecha-Birdo battle music from IWBTG. I know it's from a different game, but I really don't care enough to find out which game.

http://www.youtube.com/watch?v=Vftk0IcQUas
 
galacta knight music (pretty sadistic)
http://www.youtube.com/watch?v=wvl07qvG0pc

darkness of the unknown (to beautiful, specially the latter half)
http://www.youtube.com/watch?v=BkDrGuxLJGA
 
Earthbound- Unfounded Revenge/Smashing Song of Praise

AC- 2:00 am

Mario- Waluigi Pinball/Mario Circuit/Menu music from SPM

Wario- Ashley's Song/ those two songs in SSBB with WarioWare in their name
 
Its not a virtual game but it needs to be said that Battletoads OBVIOUSLY has the greatest pause music out there. And double Dragon II the Revenge has great title screen music.