Astroganger

Astroganger (Japanese: アストロガンガー Astroganga) is a Super Robot Japanese animated series created by Knack Productions. It consisted of 26 episodes and originally aired from October 4, 1972 to March 28, 1973.

Premise

An alien woman named Maya crash-lands on Earth. Her homeworld was destroyed by the Blasters, a cruel alien race who steals the natural resources from other planets. She falls in love with a scientist and gives birth to a human boy named Kentaro. When the Blasters invade the Earth, Kentaro must defeat them by fighting with Astroganger, a robot made from living metal.