How to RIP DS games
 

I have ROM of a game.
How to rip it?
Game is, Professor layton form Level 5.

Do DS Emulators even work? I have not found any and stopped looking several months ago.

There is a thing called ezflash , its catridge like any other DS game, in which you put SD card.
In microSD card you put games i.e roms and viola they run.

Most MP3 players have a record-line feature or something like that - that's how I did my recordings.

That's a common method of ripping DS games, but according to what I've heard, there's better ways of doing it now. Don't ask me what they are, cause I'm a total n00b to this.

Look for VGMTrans and load the rom. Then convert the streams to .wavs as you please.