Defer & flag VC korean unobtainable encounters

Closes #1985

PKHeX.Core/Legality/Checks.cs

@@ -206,8 +206,8 @@ private bool VerifyLanguage()
                 return false;
             }
 
-            // Korean Crystal does not exist
-            if (pkm.Version == (int)GameVersion.C && pkm.Korean)
+            // Korean Crystal does not exist, neither do VC1
+            if (Info.Generation <= 2 && pkm.Korean && !GameVersion.GS.Contains((GameVersion)pkm.Version))
             {
                 AddLine(Severity.Invalid, string.Format(V5, $"!={pkm.Language}", pkm.Language), CheckIdentifier.Language);
                 return false;

PKHeX.Core/Legality/Encounters/Generator/EncounterGenerator.cs

@@ -48,6 +48,7 @@ private static IEnumerable<IEncounterable> GetEncounters12(PKM pkm, LegalInfo in
 
             foreach (var z in GenerateFilteredEncounters(pkm))
             {
+                pkm.WasEgg = z.Encounter.EggEncounter;
                 info.Generation = z.Generation;
                 info.Game = z.Game;
                 yield return z.Encounter;
@@ -187,11 +188,11 @@ private static IEnumerable<GBEncounterData> GenerateFilteredEncounters(PKM pkm)
                 var move = GetPreferredGBIterator(g1i, g2i);
                 var obj = move.Peek();
 
-                if (obj.Generation == 1 && obj.Encounter is EncounterTrade && !IsEncounterTrade1Valid(pkm))
+                if ((obj.Generation == 1 && (pkm.Korean || (obj.Encounter is EncounterTrade && !IsEncounterTrade1Valid(pkm))))
+                 || (obj.Generation == 2 && (pkm.Korean && (obj.Encounter is IVersion v && v.Version == GameVersion.C))))
                     deferred.Add(obj);
                 else
                     yield return obj;
-                pkm.WasEgg = false;
                 move.MoveNext();
             }
             foreach (var z in deferred)