>>54712319>the Crystal Pool at the top of the Oni Mountain is said to give visions of the deceased>>54712355>My other thought is what if the Tera Crystals are some kind of mechanism for quantum entangled information transfer, allowing ‘memories’ one Tera Crystals sees,See I actually think these two things could be related. Tera crystals might be "memory storages" of some sort. You could even argue that Terastalization uses memories of a Pokémon of that type to make another Pokémon that type. Note how Tera crystal shards of a certain type drop from defeated Pokémon in Tera raids, which can then be used to change another Pokémon's tera type.
Plus, the professor's AI clone was "imbued with the professor's memory", and its technology was "only made possible with the power the crystals". We even see the robot partially turn into tera crystals towards the end. The professor researched the crystals for more than a decade as they created Tera orbs 10 years ago, so they must've understood them very well. If the crystals really are memory storages, they would've used them to make the AI.
I've been thinking about Tera crystals being some sort of storage ever since I realized that the description of Terapagos' perfectly round "brilliant disk" on this page is kind of reminiscent of a CD - data storage. The light that Tera crystals give off even kind of looks like the way CDs reflect light. So Terapagos might be able to "extract" those memories or storages from the crystals and do something with them.
Anyway, so what people might've seen at the Crystal Pool are "echoes" of the deceased whose memories are imbued in the crystals. Could be people who lived (and died) in Kitakami, or even from the ancient civilization - both is also possible of course. It would line up with the whole "visions of real people" thing that keeps happening.
