diff --git a/dungeon_map/data/item_mapping.asm b/dungeon_map/data/item_mapping.asm
index c9bbd05..bfa49ad 100644
--- a/dungeon_map/data/item_mapping.asm
+++ b/dungeon_map/data/item_mapping.asm
@@ -11,7 +11,7 @@ db $0B ; 09 - Hammer
 db $0B ; 0A - Hookshot
 db $0B ; 0B - Bow
 db $06 ; 0C - Boomerang
-db $06 ; 0D - Powder
+db $0B ; 0D - Powder
 db $02 ; 0E - Bottle Refill (bee)
 db $0B ; 0F - Bombos
 db $0B ; 10 - Ether
@@ -23,7 +23,7 @@ db $0B ; 15 - Somaria
 db $0B ; 16 - Bottle
 db $05 ; 17 - Heartpiece
 db $06 ; 18 - Byrna
-db $06 ; 19 - Cape
+db $0B ; 19 - Cape
 db $0B ; 1A - Mirror
 db $0B ; 1B - Glove
 db $0B ; 1C - Mitts
diff --git a/dungeon_map/hooks.asm b/dungeon_map/hooks.asm
index e35c55f..d3e56ff 100644
--- a/dungeon_map/hooks.asm
+++ b/dungeon_map/hooks.asm
@@ -25,8 +25,15 @@ db $61, $56, $57, $62
 db $61, $56, $57, $62
 db $61, $56, $57, $62
 
+; unused chest data
+org $81E9A5
+dw $00F0 ; freezor room, second chest (only one chest in supertile)
+
+org $81EA6E
+dw $00F0 ; mire spike room, second chest (only one chest in supertile)
+
 org $81EAF8
-dw $00F0 ; mark the chest data in GT climb as being part of unused room
+dw $00F0 ; GT button/switch/bladetrap room (no chest in supertile)
 
 ; Dungeon Map Palettes 2-5 left half
 org $9BE544