Normmatt has ported the VMU Emulator for the DC/PSP over to the Nintendo DS, heres what he says:
The other day i got bored and started to port the VMU Emulator for the PSP to NDS and i did but it didnt work not until i got some help from GPFerror who reported it but it only worked in Dualis, that was until i tracked down the bug that was stopping it from working on hardware it turns out it was “char **arg” making it a simply “char*” fixed it.