Mashin Eiyuuden Wataru

魔神まじん英雄えいゆー伝でんワタル

A 9-year-old boy named Wataru Ikusabe is magically transported to a magical realm of the gods called Soukaizan which he is supposed to save. In his quest to save the realm, he manages to transform a clay sculpture into a somewhat autonomous (small) Super Robot.