Possible? Yes. Probable.. no.

The game would fit, music and all onto a big enough DS flash card. But whether or not the DS could stream off the card and not encounter slowdown I dont know. Maybe a DS or hardware expert could answer this, I am not sure about the transfer rates off the DS card slot.

Worst case scenario would be sampled music, which wouldnt sound bad, but not nearly as good as the streamed music of the original.

I'd buy it if they utilized the touchscreen, like say to move your familiar around, or make a motion on it to do one of Alucard's spells.