I swear I've heard this song before on the GameGear version of Sonic The Hedgehog, but I cant seem to find it, im not sure if it was Pal or NTSC. It could also have been an unlockable as a re-release from one of the later Sonic the hedgehog games. Can anyone else confirm this?

Its currently the retro soundtrack on the stage Skytrain, being from the Game Gear version of Streets of Rage

https://www.youtube.com/watch?v=fUGYlP3qz7Q