I actually have no idea. I haven't played it in 6 years and sold my gamegear and all my games 4 years ago. I don't have a rom of it either (never seen it).
It's an extrmely kickass arabesqe themed RPG and you were aprince and had a genie (who you could power up by sprucing up his lamp with jewels, gold, and hemp) and two other guys you meet on your quest. Very solid gameplay, great classic storyline.
I relaly should get the rom for it so I can play it on my dreamcast or something. If you're an RPG fan I really suggest checking it out.
My GOD that was a great game! The Saturn version kicked A$$, i'm not sure about the SMS thow but ive been going 2 ebay 2 get my SMS games and found games i never knew were on SMS so check it out there. Many other countrys sell there games on there 2 !
I think the Oasis games were made by Sega and CG was done by Ancient if I remember right. I do remember that Game Gear game but never gotten around to playing it. It looked good from what I remember when I tried it out like 2 years ago.