diff --git a/PKHeX.Core/Legality/Encounters/Data/EncountersGO.cs b/PKHeX.Core/Legality/Encounters/Data/EncountersGO.cs
index f83b96326..9a32ec03f 100644
--- a/PKHeX.Core/Legality/Encounters/Data/EncountersGO.cs
+++ b/PKHeX.Core/Legality/Encounters/Data/EncountersGO.cs
@@ -8,17 +8,24 @@ namespace PKHeX.Core
     /// </summary>
     internal static class EncountersGO
     {
+        /// <summary> Clamp for generating encounters; no species allowed above this value except for those in <see cref="ExtraSpecies"/>. </summary>
         private const int MaxSpeciesID_GO_HOME = Legal.MaxSpeciesID_6;
 
+        /// <summary> When generating encounters, these species will be skipped. </summary>
         private static readonly HashSet<int> DisallowedSpecies = new HashSet<int>
         {
             (int)Spinda,
         };
 
+        /// <summary> Species beyond <see cref="MaxSpeciesID_GO_HOME"/> </summary>
         private static readonly int[] ExtraSpecies =
         {
             (int)Meltan,
             (int)Melmetal,
+
+            (int)Obstagoon,
+            (int)Perrserker,
+            (int)Runerigus,
         };
 
         internal static readonly EncounterArea7g[] SlotsGO_GG = EncounterArea7g.GetArea();
diff --git a/PKHeX.Core/Legality/Verifiers/FormVerifier.cs b/PKHeX.Core/Legality/Verifiers/FormVerifier.cs
index 81b879585..7370b4047 100644
--- a/PKHeX.Core/Legality/Verifiers/FormVerifier.cs
+++ b/PKHeX.Core/Legality/Verifiers/FormVerifier.cs
@@ -201,7 +201,7 @@ bool IsValidPikachuCap()
                     {
                         // We're okay with a Mime Jr. that has evolved via level up.
                     }
-                    else
+                    else if (EncounterMatch.Version != GameVersion.GO)
                     {
                         return GetInvalid(LFormInvalidGame);
                     }
diff --git a/PKHeX.Core/Legality/Verifiers/IndividualValueVerifier.cs b/PKHeX.Core/Legality/Verifiers/IndividualValueVerifier.cs
index fd260e98e..12612385a 100644
--- a/PKHeX.Core/Legality/Verifiers/IndividualValueVerifier.cs
+++ b/PKHeX.Core/Legality/Verifiers/IndividualValueVerifier.cs
@@ -66,7 +66,7 @@ private void VerifyIVsSlot(LegalityAnalysis data, EncounterSlot w)
             {
                 case 6: VerifyIVsGen6(data, w); break;
                 case 7: VerifyIVsGen7(data); break;
-                // case 8: VerifyIVsGen8(data); break; // No rules for IV generation.
+                case 8: VerifyIVsGen8(data); break;
             }
         }
 
@@ -79,6 +79,13 @@ private void VerifyIVsGen7(LegalityAnalysis data)
                 VerifyIVsFlawless(data, 2); // Chain of 10 yields 5% HA and 2 flawless IVs
         }
 
+        private void VerifyIVsGen8(LegalityAnalysis data)
+        {
+            var pkm = data.pkm;
+            if (pkm.GO)
+                VerifyIVsGoTransfer(data);
+        }
+
         private void VerifyIVsGen6(LegalityAnalysis data, EncounterSlot w)
         {
             var pkm = data.pkm;