Allow move crossover from GO initial movesets

GO imports that are created with their PK7 and PB7 movesets can bleed from their initial moves.

Example: Muk-Alola level 20 with Minimize can bleed into SV at level 20 (below the normal learn at level 21).

PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlot8GO.cs

@@ -39,7 +39,7 @@ public sealed record EncounterSlot8GO : EncounterSlotGO, IFixedOTFriendship
 
     protected override PKM GetBlank() => OriginFormat switch
     {
-        PogoImportFormat.PK7 => new PK9(),
+        PogoImportFormat.PK7 => new PK7(),
         PogoImportFormat.PB7 => new PB7(),
         PogoImportFormat.PK8 => new PK8(),
         PogoImportFormat.PA8 => new PA8(),
@@ -57,7 +57,7 @@ public sealed record EncounterSlot8GO : EncounterSlotGO, IFixedOTFriendship
         _ => throw new ArgumentOutOfRangeException(nameof(OriginFormat)),
     };
 
-    internal GameVersion OriginGroup => OriginFormat switch
+    private GameVersion OriginGroup => OriginFormat switch
     {
         PogoImportFormat.PK7 => GameVersion.USUM,
         PogoImportFormat.PB7 => GameVersion.GG,
@@ -72,6 +72,7 @@ public sealed record EncounterSlot8GO : EncounterSlotGO, IFixedOTFriendship
         PogoImportFormat.PK7 or PogoImportFormat.PB7 =>
               PersonalTable.BDSP.IsPresentInGame(Species, Form) ? EntityContext.Gen8b
             : PersonalTable.LA.IsPresentInGame(Species, Form) ? EntityContext.Gen8a
+            : PersonalTable.SV.IsPresentInGame(Species, Form) ? EntityContext.Gen9
             : EntityContext.Gen8, // don't throw an exception, just give them a context.
         PogoImportFormat.PK8 => EntityContext.Gen8,
         PogoImportFormat.PA8 => EntityContext.Gen8a,

PKHeX.Core/Legality/LearnSource/Group/LearnGroupHOME.cs

@@ -55,6 +55,12 @@ public class LearnGroupHOME : ILearnGroup
                 return true;
         }
 
+        if (!history.HasVisitedSWSH && enc is EncounterSlot8GO { OriginFormat: PogoImportFormat.PK7 or PogoImportFormat.PB7 } g8)
+        {
+            if (TryAddOriginalMovesGO(g8, result, current, pk.Met_Level))
+                return true;
+        }
+
         if (TryAddSpecialCaseMoves(pk.Species, result, current))
             return true;
 
@@ -82,6 +88,21 @@ public class LearnGroupHOME : ILearnGroup
         return false;
     }
 
+    private static bool TryAddOriginalMovesGO(EncounterSlot8GO enc, Span<MoveResult> result, ReadOnlySpan<ushort> current, int met)
+    {
+        Span<ushort> moves = stackalloc ushort[4];
+        enc.GetInitialMoves(met, moves);
+        foreach (var move in moves)
+        {
+            if (move == 0)
+                break;
+            var index = current.IndexOf(move);
+            if (index != -1)
+                result[index] = new MoveResult(LearnMethod.Shared, LearnEnvironment.HOME);
+        }
+        return MoveResult.AllParsed(result);
+    }
+
     /// <summary>
     /// Scan the results and remove any that are not valid for the game <see cref="local"/> game.
     /// </summary>
@@ -148,6 +169,8 @@ public class LearnGroupHOME : ILearnGroup
             RentLoopGetAll(LearnGroup8a.Instance, result, pk, history, enc, types, option, evos, local);
         if (history.HasVisitedBDSP && pk is not PB8)
             RentLoopGetAll(LearnGroup8b.Instance, result, pk, history, enc, types, option, evos, local);
+        if (enc is EncounterSlot8GO { OriginFormat: PogoImportFormat.PK7 or PogoImportFormat.PB7 } g8)
+            AddOriginalMovesGO(g8, result, enc.LevelMin);
 
         AddSpecialCaseMoves(pk.Species, result);
 
@@ -235,5 +258,13 @@ public class LearnGroupHOME : ILearnGroup
             result[(int)Move.VoltTackle] = true;
     }
 
+    private static void AddOriginalMovesGO(EncounterSlot8GO enc, Span<bool> result, int met)
+    {
+        Span<ushort> moves = stackalloc ushort[4];
+        enc.GetInitialMoves(met, moves);
+        foreach (var move in moves)
+            result[move] = true;
+    }
+
     private static bool IsPikachuLine(ushort species) => species is (int)Species.Raichu or (int)Species.Pikachu or (int)Species.Pichu;
 }