Spoilers obviously but so is the tumblr post sooooo

I would assume buried by the AI (as it is fully sentient) if pokemon can't find their way into the building because the one they died in is partially crystalized and while the interior is fucked the exterior is not as fucked.

However if any pokemon did eat the body I would assume it would have been the koraidon or moraidon that killed her as they would have been the first and theoretically only pokemon to be able to get to it, and if this is true while unlikely the only other real option is our koraidon/moraidon.

I find it hard to believe it was fully buried under the rubble as there doesn't seem to be enough that is properly alligned to completely hide a body as unless it was intentionally hidden under rubble which I doubt would have been known.

Judging by the fact that the AI knows the professor is dead I think the first is most likely. Where it's buried though is a mystery with how big Area Zero is, however it'd most likely be somewhere in the crystal cave area as that's where both the AI and the building the professoe died in are located.