I think there's a distinct lack of Game Boy Color games on the 3DS, but that may change soon based on some recent Australian Classification ratings. Harvest Moon 3 and Lufia: The Legend Returns have been rated, noting a potential worldwide Virtual Console release.
This iteration of Harvest Moon is famously known as the one that got the "girl" and "boy" versions, but were combined in the US. Legend Returns wasn't the sharpest tool in the Lufia shed, but hardcore RPG fans will likely want to give it a chance.
More of these, please!
Harvest Moon 3 [Australian Classification Board]