I remember watching this when I was a kid, too. Probably the last time it was ever in syndication. (I hear you thinking now, "Ooh, he's *that* old.") I've recently picked up all except about 8 of the 'known' episodes circulating in the 'unofficial' market (and am still in the market for the rest, if anyone cares). Kong didn't fight monsters in every episode, but in a pretty good portion of them. And, GPO, from my research, I think he may have even faced an Odako in one, as well. As I said, wish someone had a guide...
My thanks to my 'press agent' Enshohma for getting the word out about my article above. Makes getting all this information out to those interested so much easier for this little 'chameleon'....