Add forme randomization method

add alola option too

pk3DS/Legality/Legal.cs

@@ -220,5 +220,26 @@ class Legal
             695, 696, 697, 698, 699, 700, 701, 702, 703,
             719,
         };
+
+        internal static readonly int[] AlolanOriginForms =
+        {
+            019, // Rattata
+            020, // Raticate
+            025, // Pikachu (Cosplay not transferrable)
+            026, // Raichu
+            027, // Sandshrew
+            028, // Sandslash
+            037, // Vulpix
+            038, // Ninetails
+            050, // Diglett
+            051, // Dugtrio
+            052, // Meowth
+            053, // Persian
+            074, // Geodude
+            075, // Graveler
+            076, // Golem
+            088, // Grimer
+            089, // Muk
+        };
     }
 }

pk3DS/Legality/Randomizer.cs

@@ -72,6 +72,18 @@ internal static int[] getSpeciesList(bool G1, bool G2, bool G3, bool G4, bool G5
 
             return sL.Length == 0 ? RandomSpeciesList : sL;
         }
+        internal static int GetRandomForme(int species, bool mega, bool alola, PersonalInfo[] stats = null)
+        {
+            if (stats == null)
+                return 0;
+            if (stats[species].FormeCount <= 1)
+                return 0;
+            if (alola && Legal.AlolanOriginForms.Contains(species))
+                return (int)(Util.rnd32()%2);
+            if (!Legal.Mega_ORAS.Contains((ushort)species) || mega)
+                return (int)(Util.rnd32() % stats[species].FormeCount); // Slot-Random
+            return 0;
+        }
 
         internal static int[] getRandomItemList()
         {