Can i play N64 roms on my nintendo ds

I would like to know if I can play N64 roms on my Nintendo DS or do I need to play them on an emulator.

no you cannot. the N64 is considerably more powerful than the DS. You will have to use an emulator on your computer.

The DS has a few more powerful aspects of it's hardware than the N64, but it also lacks a lot.

This is completely impossible.The PSP is considerably more powerful than the DS, and even the PSP has problems emulating N64.For now, your PC is your only option.