Mazinger Z is extremely popular in Spain, Latin America and throughout Asia: UFO Robot Grendizer (aka Goldorak and Goldrake between 1976 and 1980 was a huge hit in Italy and France; Groizer X (aka O Pirata do Espaço ) was a '80s hit in Brasil.
He was also involved in the creation of Goldrake, Vartan, Una, Belzeba and La Poliziotta.