I dont think Sonic the Hedgehog music has been requested here before? o_o"
Well I miss good ol' tunes from sega megadrive :heh: I haven't really played the new not-so-2D games -_-

Anyone willing to transcribe for flute/melody?

-Mystic Cave Zone (Sonic 2) http://www.youtube.com/watch?v=_w4V43STftQ
-Flying Battery Zone (Sonic 3) http://www.youtube.com/watch?v=yuxjy0vcMLg

The songs are repetitive so they're not very long I think

Thanks~ :)

I could give Mystic Cave Zone a go since I have already written it for Piano.

You can try here:
http://www.gamemusicthemes.com/megadrivesheetmusic.html

You have most of old Sonic games soundtrack. It's for piano, but I'm sure you'll find useful. I think Flying Battery music is not on that page, but I think I got a MIDI here:
http://www.vgmusic.com/

Take a look =)