For what it's worth, during those weekends when those of us with powers get them back, I've tried checking the Resonances in this place, and aside from the actual ghosts, everybody here reads as alive. Though granted, that doesn't mean they were alive before they were brought here, and you've only got my word for that in any case.

The Ghost-type Pokémon admittedly make things a bit weirder, though, since most of them aren't precisely alive and yet they still hatch from eggs like most other Pokémon. And there's also the fact that we apparently can't die while we're here - people who sustain what would normally be mortal wounds wake up in the PokéCenters.