diff --git a/worlds/ff6wc/item_rewards.py b/worlds/ff6wc/item_rewards.py
index f823d84ae160..4287675ac72f 100644
--- a/worlds/ff6wc/item_rewards.py
+++ b/worlds/ff6wc/item_rewards.py
@@ -1,4 +1,5 @@
 from collections.abc import Mapping
+from functools import cache
 from random import Random
 
 from BaseClasses import ItemClassification, Location
@@ -91,6 +92,7 @@ def build_ir_from_placements(wc_event_locations: list[Location]) -> list[str]:
         return []
 
 
+@cache
 def item_qualities() -> Mapping[int, int]:
     """ to be able to sort items by quality """
     from . import FF6WCWorld
@@ -109,6 +111,12 @@ def item_qualities() -> Mapping[int, int]:
         for item_tier, key in zip(tiers, sort_keys, strict=True):
             for wc_id in item_tier:
                 qualities[wc_id] = key
+
+        # Add items not present in chest_item_tiers
+        qualities[Rom.item_name_id["Cursed Shld"]] = 1
+        qualities[Rom.item_name_id["ArchplgoItem"]] = 1
+        qualities[Rom.item_name_id["Empty"]] = 10
+
         return qualities
 
 
diff --git a/worlds/ff6wc/test/test_item_rewards.py b/worlds/ff6wc/test/test_item_rewards.py
new file mode 100644
index 000000000000..1979086edee9
--- /dev/null
+++ b/worlds/ff6wc/test/test_item_rewards.py
@@ -0,0 +1,11 @@
+from worlds.ff6wc.item_rewards import item_qualities
+from worlds.ff6wc import Rom
+
+
+def test_qualities_has_all_ids() -> None:
+    """ All the Worlds Collide item IDs should be in the item qualities mapping. """
+    qualities = item_qualities()
+
+    assert all(item_id in qualities for item_id in Rom.item_name_id.values()), [
+        item_name for item_name, item_id in Rom.item_name_id.items() if item_id not in qualities
+    ]