Fix schema

pokemon.schema.json

@@ -23,7 +23,7 @@
         "genderDifference",
         "eggGroups",
         "eggCycles",
-        "tags",
+        "flags",
         "formes",
         "evolutions"
       ],
@@ -247,6 +247,10 @@
                 "isMega": {
                   "type": "boolean"
                 },
+                "isBattleOnly": {
+                  "type": "boolean",
+                  "description": "Whether the form is only used in battle and resets to its original form after battle."
+                },
                 "moves": {}
               }
             }