Loved this show as a kid! Loved it! Of course, back then it was called "Johnny Sokko and his Flying Robot" (at least in America).
How could you not love a kid and his giant robot protecting the world from giant, evil monsters every week??
Well, I don't know how much the Japanese viewing audience liked it back in the 60's when it originally aired because it only lasted mere 26 episodes. Of course, later it became a beloved cult classic and is now a part of Japanese pop culture, and luckily, we can get cool figures of him like this one from Kaiyodo and their Revoltech line.
He's slated for a July release for Y2,850 (approx $30.00)