You will need DSi BIOS and Firmware files (dumped from a real DSi) to run DSiWare.
The ROM version of Soul of Darkness on NDS refers to a digital copy of the game that can be played on a computer or mobile device using a suitable emulator. The ROM file contains the game's data, including its code, graphics, and soundtracks. This version has gained popularity among gamers and enthusiasts, who can play the game on various platforms, modifying or enhancing it to their liking. soul of darkness nds rom