There are at least two United States versions of this series. One (the superior in my opinion) was part of Jim Terry's Force Five, a show composed of five different animated series from Japan. Another is a feature-length "movie" composed of four or five of the show's pivotal episodes spliced together. The Force Five version went all the way through the original series while the "movie" only covers the first "boss villain's" introduction and defeat.
Either way you get it, Grandizer is a fun show. The hero, Duke Fleed (aka Orion Quest) is an experienced pilot right off the bat so they can skip the tedious training and such that seems to be the mainstay of most super and giant robot shows. Grandizer is also interesting in that he doesn't triumph because he is much more powerful than his foes (though he is powerful), he wins because he's *better* than they are.
Duke himself is an alien, physically superior to humans. Also, he is the reluctant hero type. However, he knows it was his fault the Vegan empire came to Earth and it's his responsibility to fight them. He only hesitates for the briefest of moments before unearthing Grandizer and heading into combat once more. His angst is there but not the alpha and omega of his character. Contrast this to shows like Evangelion, in which the characters' angst was all there was to them.
The supporting cast, including Koji Kabuto from "Mazinger Z", come off well with the exception of a midget cowboy apparently put in just to make fun of Americans. Fortunately, he doesn't do much. It's a lot of fun to see how Duke will prove himself superior to Koji from episode to episode. It's as if Go Nagai, creator of both "Grandizer" and "Mazinger Z", didn't really like Koji and wanted to humiliate him at every opportunity.
If you can find the "movie" version, pick it up. It's a lot of fun especially if you enjoy "old-school" super robots. The Force Five version is more satisfying, if you can get ahold of it. I am unaware of any subtitled in English versions of the original Japanese unless you can track down a fan sub.
