I thought I would share a sweet little thing I found. I haven't been looking through the forum lately, so I'm sorry if this has already been addressed, but If you hold down the select button, while choosing your virtual console game, like you would if you were playing a DS game. It displays it in it's native resolution, only it puts it inside a "virtual console". I'm playing Link's Awakening right now and the video is displayed inside a background that looks like a Game Boy Color. Also if 3D is turned on it makes it look like the LCD is sunken into the unit. Freakin sweet!
EDIT: I'd also like to note that original Game Boy games not only work the same way, but they can be changed to their original green color by holding L+R and pressing Y.
EDIT: I'd also like to note that original Game Boy games not only work the same way, but they can be changed to their original green color by holding L+R and pressing Y.