Someone a while ago had asked if the ghost mechanics in PMDU worked the same way as in PMD-E, and you had said "it's a little different, but the same general concept". I'm curious, can you elaborate any on the differences, or will that have to wait till later?

It’s sort of story related. But at the most basic level, ghosts operate the same was as in PMDE. That is, a ghost pokemon can be created from a dead pokemon. It’s just that the conditions for doing so are now slightly different. Not just any dead pokemon can become a ghost.