Ripping Tool recommendations?

[Shade]

Well, in this particular case, I'm looking at Golden Sun Dark Dawn for the NDS. Unfortunately, what I need is not able to be gotten via screenshots, so I'd need something capable of actually taking the images directly from the code.

Also... what's this about "disabling" layers?

Disabling layers is a very handy tool in sprite ripping.
It allows you to remove different layers of the background/sprites.
It's very cool because you don't have to erase the background manually every time you rip a new pose. Also, what can you not rip via screenshots in Golden Sun: Dark Dawn?