Just go ahead and spoil it dude (add the spoiler tag to the comment), to be honest most people's are not interested in this game, it is understandable, most of us from the Snes era are close to our forties so the "awe" in Snes games is not there anymore and most people's won't bother in trying to fight that secret boss either because there's no good updated english walkthrough and we won't bother in figuring it out either.
So just let it go and spoil any secrets that you guys know about this game.
I've found some info about that event in Japanese, and with my rudimentary knowledge of it and the always useful Rikalchan firefox plugin, I'm trying to make some sense out it:
By the way, I'm in my forties and I've enjoyed this game. I've been looking forward to it for years and it has been quite a rewarding experience being able to play it at last from start to finish (it adds, in a way, a feeling of "closure" to a long lasting wish of mine for many years). There are also several other snes games I'm waiting for, such as Daikaijuu Monogatari 2, Shin Momotarou Densetsu (I think no one's even trying to translate this one), Last Bible 3, God, Tenshi no Uta, Odisselya 2 (another game with no known plans of being translated; it seems to involve time travel), and many others I forgot now.
I don't know why, but snes jrpgs make me feel something that other newer jrpgs don't. Perhaps it's me, that I'm fond of the snes era and experience them in a different way. I've enjoyed Makyou Zero more than, for instance, Bravely default/Second, Radiant Historia and many others.