The following is a list of file types found in DS ROMs. They can be common or game specific.
“We take no responsibility for any damages you may do to your DS, your games, flash cards, your...Nintendo DS Hacking Wiki
“An .swar is the archive that holds sound samples, likely for playback with .sseq files, in a DS....swar
“An .sdat file is a music archive file in a Nintendo DS ROM. An sdat file may contain .sseq....sdat