Remove Pay Day from Mewtwo on transfer 1->7

Retains legality relevant to Bank transfer checks with Yellow's TMHM
table.

PKHeX/Legality/Checks.cs

@@ -631,6 +631,9 @@ private CheckResult verifyVCEncounter(int baseSpecies)
             if (pkm.Egg_Location != ematch.EggLocation)
                 return new CheckResult(Severity.Invalid, "Should not have an egg location.", CheckIdentifier.Encounter);
 
+            if (species == 150 && pkm.Moves.Contains(6))
+                return new CheckResult(Severity.Invalid, "Mewtwo cannot be transferred while knowing Pay Day.", CheckIdentifier.Encounter);
+
             return new CheckResult(CheckIdentifier.Encounter);
         }
         private void verifyLevel()

PKHeX/PKM/PK1.cs

@@ -381,6 +381,18 @@ public PK7 convertToPK7()
             }
             
             pk7.TradeMemory(Bank:true); // oh no, memories on gen7 pkm
+
+            if (pk7.Species == 150) // Pay Day Mewtwo
+            {
+                var moves = pk7.Moves;
+                var index = Array.IndexOf(moves, 6);
+                if (index != -1)
+                {
+                    moves[index] = 0;
+                    pk7.Moves = moves;
+                    pk7.FixMoves();
+                }
+            }
             
             pk7.RefreshChecksum();
             return pk7;