diff --git a/PKHeX.Core/Legality/Areas/EncounterArea7.cs b/PKHeX.Core/Legality/Areas/EncounterArea7.cs
index 479af8b23..44602aae5 100644
--- a/PKHeX.Core/Legality/Areas/EncounterArea7.cs
+++ b/PKHeX.Core/Legality/Areas/EncounterArea7.cs
@@ -28,7 +28,7 @@ void CachePressureSlot(EncounterSlot s)
                     slotMax = s;
             }
 
-            if (Legal.AlolanVariantEvolutions12.Contains(species)) // match form if same species, else form 0.
+            if (Legal.AlolanVariantEvolutions12.Contains(species) || Legal.GalarVariantFormEvolutions.Contains(species)) // match form if same species, else form 0.
             {
                 foreach (var slot in slots)
                 {
@@ -60,7 +60,7 @@ void CachePressureSlot(EncounterSlot s)
             if (slotMax == null)
                 yield break;
 
-            if (Legal.AlolanVariantEvolutions12.Contains(species)) // match form if same species, else form 0.
+            if (Legal.AlolanVariantEvolutions12.Contains(species) || Legal.GalarVariantFormEvolutions.Contains(species)) // match form if same species, else form 0.
             {
                 if (species == slotMax.Species ? slotMax.Form == form : slotMax.Form == 0)
                     yield return GetPressureSlot(slotMax, pkm);
diff --git a/PKHeX.Core/Legality/Areas/EncounterArea7b.cs b/PKHeX.Core/Legality/Areas/EncounterArea7b.cs
index 8774900c6..ba26241e4 100644
--- a/PKHeX.Core/Legality/Areas/EncounterArea7b.cs
+++ b/PKHeX.Core/Legality/Areas/EncounterArea7b.cs
@@ -24,7 +24,7 @@ protected override IEnumerable<EncounterSlot> GetFilteredSlots(PKM pkm, IEnumera
             int species = pkm.Species;
 
             int form = pkm.AltForm;
-            if (Legal.AlolanVariantEvolutions12.Contains(species)) // match form if same species, else form 0.
+            if (Legal.AlolanVariantEvolutions12.Contains(species) || Legal.GalarVariantFormEvolutions.Contains(species)) // match form if same species, else form 0.
             {
                 if (pkm.AltForm != 0 && pkm is PB7)
                     yield break; // can't get Alolan forms from wild
diff --git a/PKHeX.Core/Legality/Areas/EncounterArea7g.cs b/PKHeX.Core/Legality/Areas/EncounterArea7g.cs
index 5a0a389bb..5b88a819b 100644
--- a/PKHeX.Core/Legality/Areas/EncounterArea7g.cs
+++ b/PKHeX.Core/Legality/Areas/EncounterArea7g.cs
@@ -13,7 +13,7 @@ protected override IEnumerable<EncounterSlot> GetFilteredSlots(PKM pkm, IEnumera
             int species = pkm.Species;
             int form = pkm.AltForm;
 
-            if (Legal.AlolanVariantEvolutions12.Contains(species)) // match form if same species, else form 0.
+            if (Legal.AlolanVariantEvolutions12.Contains(species) || Legal.GalarVariantFormEvolutions.Contains(species)) // match form if same species, else form 0.
             {
                 foreach (var slot in slots)
                 {
diff --git a/PKHeX.Core/Legality/Core.cs b/PKHeX.Core/Legality/Core.cs
index 14c76f4db..e2709b03c 100644
--- a/PKHeX.Core/Legality/Core.cs
+++ b/PKHeX.Core/Legality/Core.cs
@@ -453,7 +453,7 @@ private static bool IsEvolvedFormChange(PKM pkm)
             if (pkm.IsEgg)
                 return false;
 
-            if (pkm.Format >= 7 && AlolanVariantEvolutions12.Contains(pkm.Species))
+            if (pkm.Format >= 7 && (AlolanVariantEvolutions12.Contains(pkm.Species) || GalarVariantFormEvolutions.Contains(pkm.Species)))
                 return pkm.AltForm == 1;
             if (pkm.Format >= 8)
             {
diff --git a/PKHeX.Core/Legality/Encounters/Generator/EncounterEggGenerator.cs b/PKHeX.Core/Legality/Encounters/Generator/EncounterEggGenerator.cs
index f56d7b824..cb24b0c5c 100644
--- a/PKHeX.Core/Legality/Encounters/Generator/EncounterEggGenerator.cs
+++ b/PKHeX.Core/Legality/Encounters/Generator/EncounterEggGenerator.cs
@@ -34,7 +34,7 @@ public static IEnumerable<EncounterEgg> GenerateEggs(PKM pkm, IReadOnlyList<EvoC
             int max = GetMaxSpeciesOrigin(gen);
 
             var e = GetBaseSpecies(vs, 0);
-            if (e.Species <= max)
+            if (e.Species <= max && !NoHatchFromEggFormGen(e.Species, e.Form, ver))
             {
                 yield return new EncounterEgg(e.Species, e.Form, lvl) { Version = ver };
                 if (gen > 5 && (pkm.WasTradedEgg || all) && HasOtherGamePair(ver))
@@ -45,7 +45,7 @@ public static IEnumerable<EncounterEgg> GenerateEggs(PKM pkm, IReadOnlyList<EvoC
                 yield break; // no other possible species
 
             var o = GetBaseSpecies(vs, 1);
-            if (o.Species <= max)
+            if (o.Species <= max && !NoHatchFromEggFormGen(o.Species, o.Form, ver))
             {
                 yield return new EncounterEggSplit(o.Species, o.Form, lvl, e.Species) { Version = ver };
                 if (gen > 5 && (pkm.WasTradedEgg || all) && HasOtherGamePair(ver))
@@ -66,6 +66,14 @@ private static bool NoHatchFromEggForm(int species, int form, int gen)
             return false;
         }
 
+        private static bool NoHatchFromEggFormGen(int species, int form, GameVersion game)
+        {
+            // Sanity check form for origin
+            var gameInfo = GameData.GetPersonal(game);
+            var entry = gameInfo.GetFormeEntry(species, form);
+            return form >= entry.FormeCount;
+        }
+
         // Gen6+ update the origin game when hatched. Quick manip for X.Y<->A.O | S.M<->US.UM, ie X->A
         private static GameVersion GetOtherTradePair(GameVersion ver)
         {
diff --git a/PKHeX.Core/Legality/Evolutions/EvolutionTree.cs b/PKHeX.Core/Legality/Evolutions/EvolutionTree.cs
index fbe598ab7..f0a1ec1fd 100644
--- a/PKHeX.Core/Legality/Evolutions/EvolutionTree.cs
+++ b/PKHeX.Core/Legality/Evolutions/EvolutionTree.cs
@@ -176,7 +176,7 @@ private void FixEvoTreeSS()
         {
             // Gigantamax Pikachu, Meowth-0, and Eevee are prevented from evolving.
             BanEvo((int)Species.Raichu, 0, pkm => pkm is IGigantamax g && g.CanGigantamax);
-            BanEvo((int)Species.Raichu, 1, pkm => pkm is IGigantamax g && g.CanGigantamax || pkm.Gen8);
+            BanEvo((int)Species.Raichu, 1, pkm => pkm is IGigantamax g && g.CanGigantamax || pkm.Gen8 || pkm.GG);
             BanEvo((int)Species.Persian, 0, pkm => pkm is IGigantamax g && g.CanGigantamax);
 
             BanEvo((int)Species.Weezing, 0, pkm => pkm.Gen8);