Block wild dusk rockruff

closes #1627
adds test cases

PKHeX.Core/Legality/Encounters/EncounterGenerator.cs

@@ -624,6 +624,14 @@ private static IEnumerable<EncounterSlot> GetFilteredSlots67(PKM pkm, IReadOnlyC
             int species = pkm.Species;
             int form = pkm.AltForm;
 
+            // Edge Case Handling
+            switch (species)
+            {
+                case 744 when form == 1:
+                case 745 when form == 2:
+                    yield break;
+            }
+
             if (AlolanVariantEvolutions12.Contains(species)) // match form if same species, else form 0.
                 slotdata = encounterSlots.Where(slot => species == slot.Species ? slot.Form == form : slot.Form == 0);
             else if (ShouldMatchSlotForm()) // match slot form

Tests/PKHeX.Tests/Legality/LegalityTests.cs

@@ -32,6 +32,7 @@ public void VerifyLegalityTest()
 
             folder = Path.Combine(folder, "Legality");
             VerifyAll(folder, "Legal", true);
+            VerifyAll(folder, "Illegal", false);
         }
 
         // ReSharper disable once UnusedParameter.Local