In the 70's there were really a quantopia of mazinger franchises. I remember going to a toy store with my mom when I was about 4 years old. In the store they had a like 2 walls stacked with robot toys. Now picture yourself being 4 years old and your mom says: "Pick one son".
Back in those days they made those robot toys with plastic and metal, and I'm sure u all know that some of the Transformers were made like that also. Noone makes toys like that anymore 🙁. If u guys wanna see what they looked like u can search ebay for the Mazinger. U will find the robot toy in full metal and some parts r combined with magnets. 😄