Between "Golden Bracers" and "Gothic Choker" is the "Golden Doll"
The others I don't know and I also miss the one between "Decaying Pocketwatch" and "Drinking Gag".
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First you need to get four "Black Visors".
You can get them by interacting with "Black Shrine" if "Bimbo quirks <= 2".
"Black Visors" prevents "Bimbo tokens" and "Bimbo quirks".
Now all that's left is to advance through the dungeon until you find "Errant Signal", defeat it and find the exit.
Personally what I did was:
-Enter the dungeon, go north, go north, go west, go south, go south, go south. There is a "Black Shrine" there. Now go east and open the shortcut at the beginning. Go in and out of the dungeon until you get 4 "Black Visors".
- Now that I can prevent "Bimbo quirks" I erased them from the adventurers, formed a hyper-offensive team that defeated common enemies in 1 to 2 turns and advanced without problems until I found the "Errant Signal" in the labyrinth.