Set egg form for gen5-9

Missed this in the PR
gen5 needs form for basculin

PKHeX.Core/Legality/Encounters/Generator/ByGeneration/EncounterGenerator5.cs

@@ -34,7 +34,7 @@ public IEnumerable<IEncounterable> GetEncounters(PKM pk, EvoCriteria[] chain, Le
     private const EntityContext Context = EntityContext.Gen5;
     private const byte EggLevel = EggStateLegality.EggMetLevel;
 
-    private static EncounterEgg5 CreateEggEncounter(ushort species, GameVersion version) => new(species, version);
+    private static EncounterEgg5 CreateEggEncounter(ushort species, byte form, GameVersion version) => new(species, form, version);
 
     private static (ushort Species, byte Form) GetBaby(EvoCriteria lowest)
     {
@@ -63,7 +63,7 @@ public static bool TryGetEgg(ReadOnlySpan<EvoCriteria> chain, GameVersion versio
         if (!PersonalTable.B2W2.IsPresentInGame(species, form))
             return false;
 
-        result = CreateEggEncounter(species, version);
+        result = CreateEggEncounter(species, form,version);
         return true;
     }
 

PKHeX.Core/Legality/Encounters/Templates/Gen5/EncounterEgg5.cs

@@ -3,7 +3,7 @@
 
 namespace PKHeX.Core;
 
-public sealed record EncounterEgg5(ushort Species, GameVersion Version) : IEncounterEgg, IRandomCorrelation
+public sealed record EncounterEgg5(ushort Species, byte Form, GameVersion Version) : IEncounterEgg, IRandomCorrelation
 {
     private const ushort Location = Locations.HatchLocation5;
 
@@ -13,7 +13,6 @@ public sealed record EncounterEgg5(ushort Species, GameVersion Version) : IEncou
     public const byte Level = 1;
     public bool CanHaveVoltTackle => Species is (int)Core.Species.Pichu;
 
-    public byte Form => 0;
     public byte Generation => 5;
     public EntityContext Context => EntityContext.Gen5;
     public bool IsShiny => false;
@@ -41,6 +40,7 @@ public PK5 ConvertToPKM(ITrainerInfo tr, EncounterCriteria criteria)
         var pk = new PK5
         {
             Species = Species,
+            Form = Form,
             CurrentLevel = Level,
             Version = Version,
             Ball = (byte)FixedBall,

PKHeX.Core/Legality/Encounters/Templates/Gen6/EncounterEgg6.cs

@@ -41,6 +41,7 @@ public PK6 ConvertToPKM(ITrainerInfo tr, EncounterCriteria criteria)
         var pk = new PK6
         {
             Species = Species,
+            Form = Form,
             CurrentLevel = Level,
             Version = Version,
             Ball = (byte)Ball.Poke,

PKHeX.Core/Legality/Encounters/Templates/Gen7/EncounterEgg7.cs

@@ -39,6 +39,7 @@ public PK7 ConvertToPKM(ITrainerInfo tr, EncounterCriteria criteria)
         var pk = new PK7
         {
             Species = Species,
+            Form = Form,
             CurrentLevel = Level,
             Version = Version,
             Ball = (byte)Ball.Poke,

PKHeX.Core/Legality/Encounters/Templates/Gen8/EncounterEgg8.cs

@@ -36,6 +36,7 @@ public PK8 ConvertToPKM(ITrainerInfo tr, EncounterCriteria criteria)
         var pk = new PK8
         {
             Species = Species,
+            Form = Form,
             CurrentLevel = Level,
             Version = Version,
             Ball = (byte)Ball.Poke,

PKHeX.Core/Legality/Encounters/Templates/Gen8b/EncounterEgg8b.cs

@@ -36,6 +36,7 @@ public PB8 ConvertToPKM(ITrainerInfo tr, EncounterCriteria criteria)
         var pk = new PB8
         {
             Species = Species,
+            Form = Form,
             CurrentLevel = Level,
             Version = Version,
             Ball = (byte)Ball.Poke,

PKHeX.Core/Legality/Encounters/Templates/Gen9/EncounterEgg9.cs

@@ -36,6 +36,7 @@ public PK9 ConvertToPKM(ITrainerInfo tr, EncounterCriteria criteria)
         var pk = new PK9
         {
             Species = Species,
+            Form = Form,
             CurrentLevel = Level,
             Version = Version,
             Ball = (byte)Ball.Poke,