Board Thread:Naruto: The Last Discussion/@comment-12509038-20141206031744/@comment-3279282-20141206062447

He's actually mentioned along with Chiyo and Sasori. It says on page 21:

Monzaemon, Chiyo, Sasori - legendary users of "puppet ninjutsu" come from Sunagakure. But apparently, the Otsutsuki Clan is its (the puppet ninjutsu's) origin. Because the current moon is flooded with puppets.