These should probably be ripped with the most contrasting and separated palettes rather than the default ones. I don't know the inner workings of his method but if the palettes are ripped it should be possible.

The Digital Art Compendium sprites are actually what's used in game. Although dumping the contents of the .gfs, .art and .msb.spr files is trivial and has been for several years now. This is old news.