After putting the appropriate source: (e.g. Pokemon: Gold/Silver/Crystal)
Add the abbreviation of the game in the song name. This is for consistency. (e.g. Biking Theme (G/S/C))
The artist of most if not all is Junichi Masuda
Pokemon: Red/Green/Blue/Yellow (R/G/B/Y) -- CLAIMED by Powerdrone -- http://www.youtube.com/watch?v=nxU2UjAjN24
Pokemon: Gold/Silver/Crystal (G/S/C) -- CLAIMED by norjaez -- http://www.youtube.com/watch?v=6KFILUFqcjE
Pokemon: Ruby/Sapphire/Emerald (R/S/E) -- CLAIMED by misja056 -- http://www.youtube.com/watch?v=gexTc0YbYx8
Pokemon: FireRed/LeafGreen (FR/LG) -- CLAIMED by Bass-chan -- http://www.youtube.com/watch?v=dJ02Yk8U7d0
Pokemon: Diamond/Pearl/Platinum (D/P/Pt) -- CLAIMED by Larto-- http://www.youtube.com/watch?v=YoEbDs39lY8
Pokemon: HeartGold/SoulSilver (HG/SS) -- RANKED -- Mapped by NoHItter -- http://osu.ppy.sh/s/15121
Pokemon: Black/White (B/W) -- CLAIMED by NotShinta -- http://www.youtube.com/watch?v=uKbRnRtkAic
.mp3's should be fairly easy to find.