@prettygood okay, do yourself a favour and go watch mazinger z and getter robo, if you can watch the ones from the 70s first would be better but if you don't feel like watching 92 episodes of mazinger z and 51 episdoes of getter robo (well 90 if you count the 39 episodes of getter robo g) then ya can watch the modern-ish adaptations shin mazinger shogeki z hen and getter robo armageddon.
getter robo armageddon you can even watch on youtube as all the 13 episodes are there.