Ah, there were so many good games for the game boy color... One of them was Yu-gi-oh!: Dark Duel Stories. Though it's been years since I've played it, I remember how much I loved the music, especially the music that played while a battle with Yami Yugi was going on. I recently taught myself how to play a bit of it on piano, and after that, I went "Hey! I should remix this!" So I did. It's quite a bit more relaxed than the original, which is based around a sort of "final battle" theme. I don't have much more to say about it, so enjoy!