Why would someone say no to that? Of course it would be awesome.
BUt like mentioned before, it would be very limited. Maybe about 15 characters, and about 20 stages- or even less than that. I don't think they'd have much trophies, but what they could do is just put in trophies from DS games. You know, to open up the DS world as well. The online and Local multiplayer would work great having it 4ps and all.....and like stated earlier, it would have to be similar to the original. It's completely doable since the DS is stronger than the 64 [a little bit.] But yea, Sakurai said he's not interested in making one, so I wouldn't expect one soon. Maybe when the DS 2 comes out........