You kind of answered your own question

It's because the 3DS doesnt use the DS(lite) firmware to run those games, it instead uses the DSi firmware, allowing the 3DS to use DSi features like the camera, DSiWare and run DSi-enhanced games better than a DS(lite) would

Adding to the other comment, if I remember correctly DSi programs are essentially just DS programs given the power to use things like the camera and storage. If you try hard enough, you could run them on DSlite or any other DS

ro is right, dsiware is just .nds but some need more ram, you can tangibly run DSiWare on a DS Lite on a title-by-title basis

Excellent, an actual discussion, I recently purchased an AceCard so I hoping the modded DsiXL and 3DS will allow me to try out the cool homebrew I've been reading about :)

Kind of simple for this one. basically, nintendo never changed the way they made stuff, so It's easy to emulate stuff on something that can run It, oh and besides when Satoru died and got replaced by f'ing demons.

heh

I wish they port GC games to the 3DS.