New theory!
Some of the stalker places we have been going are type locked. Only a pokemon of that certain type could get there.

For example, the flying type obstacle at the tip, which had a note from payload (which made us narrow down the suspects in town to only the flying types). It gave us another reason to suspect the bird we already do suspect, Dee Mang.

Now, down the beguiling fairy tunnel, which only fairies could get though, we found a big room of abatis victims. Stands to reason, therefore, that abatis is a fairy type?
The fairy types in town are;
- Timpani ther kirlia (is a guard, had access to weapons?)
- GalDan the Mawile (fairy and steel, possible connection with weapons yet again)
- Mitlee the mimikyu (seemed friendly? But who really knows)
- Irston the Dedenne (super friendly salesman with a big secret? Ehhh I'm not buying it)
- Balene the Cottonee (their partner was killed by stalkers. I highly doubt they were desperate and made a stalker deal in the first place, they had a pretty successful business)