Add new Marshadow version - move old to gen7

data/pokemon.json

@@ -26183,6 +26183,10 @@
         "$": {
           "has_female": false,
           "has_right": true
+        },
+        "gen7": {
+          "has_female": false,
+          "has_right": true
         }
       }
     },
@@ -26190,6 +26194,9 @@
       "forms": {
         "$": {
           "is_prev_gen_icon": false
+        },
+        "gen7": {
+          "is_prev_gen_icon": false
         }
       }
     }