Re: 2. Showa gamera (16) vs. GFW Manda (23)
Not much Manda can really DO to Gamera (even if he's weakened by the forcefield, so is Manda), who's survived slicing, impalement, paralysis, internal parasites, and... pretty much everything, really.
Ever notice the gigantic amount of huge, ancient, mysterious, and generally frightening superconstructs in sci-fi? It's like, "Hey, look, it's the Megalithic Murderous Death Engine of Armhageddo IV, built one hundred-trillion-bazillion years ago by a race of sentient question marks because they were bored one day. And it was raining outside."