diff --git a/pokedex/data/csv/item_categories.csv b/pokedex/data/csv/item_categories.csv
index a6d84c7..75e9d24 100644
--- a/pokedex/data/csv/item_categories.csv
+++ b/pokedex/data/csv/item_categories.csv
@@ -41,3 +41,5 @@ id,pocket_id,identifier
 41,8,data-cards
 42,1,jewels
 43,7,miracle-shooter
+44,1,mega-stones
+10001,8,xy-unknown
diff --git a/pokedex/data/csv/item_category_prose.csv b/pokedex/data/csv/item_category_prose.csv
index 619423a..ead8c30 100644
--- a/pokedex/data/csv/item_category_prose.csv
+++ b/pokedex/data/csv/item_category_prose.csv
@@ -41,3 +41,5 @@ item_category_id,local_language_id,name
 41,9,Data Cards
 42,9,Jewels
 43,9,Miracle Shooter
+44,9,Mega Stones
+10001,9,X/Y unknown