User blog comment:Pyro3345/World of Minecraft Skins & more!/@comment-4040749-20110616233642

Peraldon has said before that any NPC on the forum page that does not have an image for it still needs a skin. Speaking from personal experience, however, this does not guarantee that he does not have a skin for that NPC already. He seems to have slowed down on updating the page (I haven't noticed any updates since the end of May). He is probably/hopefully busy with other aspects of the mod at the moment. It wouldn't hurt to have more than one variant of the NPC's either so I guess don't worry about making a skin someone already has done.