Harvest Moon DS: Grand Bazaar
I just tried (to be sure), and like other DS HM items or most othe DS games on the New Nintendo 3DS it plays fine but looks a tiny bit... I guess weird is the word? The 3DS has a bigger bottom screen, so the bottom screen looks a tiny bit off. My copy plays fine, no glitches that I see, it just looks like most DS games do on a 3DS; a tiny bit off. If you're fine with the bottom screen just looking a bit weird, you are golden.