User blog comment:SheldonCooperWannabe/All Wesen/@comment-67.167.110.47-20130129030121/@comment-5116706-20130129141029

None, that we know of. The fanmade Wesen are simply made by the writers here on this wiki. We wrote them for fun. The others have already made an appearance. The Wesen that made an appearance were made by the writers of Grimm.