Why don't we see more N64 ports on the DS?

[makingmusic476]

I don't see the need for a bunch of N64 ports on the DS. Especially considering most games will end up with gimped controls.

My primary issue with the PSP is that most of the games feel like downgraded ps2 games (like God of War: Chains of Olympus) with often gimped controls (particularly shooters like Resistance: Retribution).

What I want from my handhelds are more unique experiences like Prof. Layton, Scribblenauts, and Patapon. The DS gives me this in spades. I couldn't ask for much else.