The VG Resource

So The Sounds Resource has voice files for each and every character from both EN and JP versions, all except for Xion. I'd like to know how to rip the voice clips myself, does anyone on this forum know how?

It's an NDS game, but I dunno anything about ripping voice files from it.

To further add, some games have their swav's named, others do not. You must separate the sound files by voice and sound effects, especially if they aren't named.