The Neather does not reappear in the original KDD.
When TFMurphy replaced the original Neather with a scripted character, making him go through a pantomime if the player goes round the rooms again wasn't a high priority. He decided to put "
End"
commands in the script so the Neather doesn't reappear. Since that was his decision, as far as I'm concerned, that is what "
should"
happen.
Now, I can't remember the details, but I'm pretty sure I did make some changes concerning what happens if the player goes round again -- in particular, because several rooms are possible to leave uncleared the first time round, including 2W, where this is even a challenge. I no longer have the original script to refer to, but I think I just changed it so the Neather's script Ends
only if the room is clear.
I've double-checked the scripting in 1N and it seems fine to me: the Neather has "
If... Wait for clean room, End"
at the start of his script, so he should reappear (and do the same actions) if the room is uncleared, but never appear if it's cleared.
Unfortunately it's not easy to test this because I would have to play through the entire level to do so
Do you know whether or not you cleared 1N the first time round?
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50th Skywatcher