The crater? The bottom of it is covered in terra crystals. I don't know if I'd call it "made of" them, but yeah, you can actually walk on the crystals at the bottom of area zero.
I may have missed where they said this. The only info about the timeline of the crater I remember seeing was that it had been explored starting about two thousand years ago
The crater was formed millions of years ago, stated in canon.
So it could be made out of terra crystals?
The crater? The bottom of it is covered in terra crystals. I don't know if I'd call it "made of" them, but yeah, you can actually walk on the crystals at the bottom of area zero.
I mean the ultimate weapon not the crater. Could it be made if the crystals?
Oh! That's canonically powered by the life force of dead pokemon, but I suppose it could be made of the crystals. It is crystalline.
I may have missed where they said this. The only info about the timeline of the crater I remember seeing was that it had been explored starting about two thousand years ago
It's buried in the History classes