it's god mazinger, a magic stone soldier, not machine. it's one of those failed go ngai mazinger mangas
All you need is love, all you want is sex, all you have is porn - some random scribbling in a public bathroom.
i have no idea who's the red robot,the one in the right of Grendizer/Goldorak and the robot in the back.Hell there's a lot of mecha anime out there so no surprise that there's one that nobody knows of.