The VG Resource

Does anyone know how to rip sprites(other than the icon) from DS download play demos, specifically Nintendo Channel ones? Tinke does not seem to work for these, and I don't really know what to do.

While I haven't tried ripping sprites from those games specifically, have you tried decompressing the arm9 binary and checking that? I know sometimes graphics n stuff can be found in there, though you'll probably have to sift though it with a hex editor or use tile molester or something.