diff --git a/PKHeX.Core/Legality/Encounters/Data/EncounterUtil.cs b/PKHeX.Core/Legality/Encounters/Data/EncounterUtil.cs
index 989026137..10f71bbca 100644
--- a/PKHeX.Core/Legality/Encounters/Data/EncounterUtil.cs
+++ b/PKHeX.Core/Legality/Encounters/Data/EncounterUtil.cs
@@ -208,7 +208,7 @@ internal static void ReduceAreasSize(ref EncounterArea[] Areas)
             }).ToArray();
         }
 
-        internal static T[] ConcatAll<T>(params T[][] arr) => arr.SelectMany(z => z).ToArray();
+        internal static T[] ConcatAll<T>(params IEnumerable<T>[] arr) => arr.SelectMany(z => z).ToArray();
 
         internal static void MarkEncounterAreaArray(params EncounterArea[][] areas)
         {
diff --git a/PKHeX.Core/Legality/Encounters/Data/Encounters4.cs b/PKHeX.Core/Legality/Encounters/Data/Encounters4.cs
index 323675501..3f02fd965 100644
--- a/PKHeX.Core/Legality/Encounters/Data/Encounters4.cs
+++ b/PKHeX.Core/Legality/Encounters/Data/Encounters4.cs
@@ -895,11 +895,12 @@ private static void MarkHGSSEncounterTypeSlots(ref EncounterArea[] Areas)
             new EncounterStaticTyped { Species = 484, Level = 01, Location = 231, Gift = true, TypeEncounter = EncounterType.Starter_Fossil_Gift_Pt_DPTrio }, //Palkia @ Sinjoh Ruins
             new EncounterStaticTyped { Species = 487, Level = 01, Location = 231, Gift = true, TypeEncounter = EncounterType.Starter_Fossil_Gift_Pt_DPTrio, Form = 1 }, //Giratina @ Sinjoh Ruins
         };
-        private static readonly EncounterStatic[] Encounter_HGSS = Encounter_HGSS_KantoRoam_Grass.SelectMany(e => e.Clone(Roaming_MetLocation_HGSS_Kanto_Grass)).Concat(
-            Encounter_HGSS_KantoRoam_Surf.SelectMany(e => e.Clone(Roaming_MetLocation_HGSS_Kanto_Surf))).Concat(
-            Encounter_HGSS_JohtoRoam_Grass.SelectMany(e => e.Clone(Roaming_MetLocation_HGSS_Johto_Grass))).Concat(
-            Encounter_HGSS_JohtoRoam_Surf.SelectMany(e => e.Clone(Roaming_MetLocation_HGSS_Johto_Surf))).Concat(
-            Encounter_HGSS_Regular).ToArray();
+        private static readonly EncounterStatic[] Encounter_HGSS = ConcatAll(
+            Encounter_HGSS_KantoRoam_Grass.SelectMany(e => e.Clone(Roaming_MetLocation_HGSS_Kanto_Grass)),
+            Encounter_HGSS_KantoRoam_Surf.SelectMany(e => e.Clone(Roaming_MetLocation_HGSS_Kanto_Surf)),
+            Encounter_HGSS_JohtoRoam_Grass.SelectMany(e => e.Clone(Roaming_MetLocation_HGSS_Johto_Grass)),
+            Encounter_HGSS_JohtoRoam_Surf.SelectMany(e => e.Clone(Roaming_MetLocation_HGSS_Johto_Surf)),
+            Encounter_HGSS_Regular);
         #endregion
         #region Trade Tables
         internal static readonly string[] RanchOTNames = { null, "ユカリ", "Hayley", "EULALIE", "GIULIA", "EUKALIA", null, "Eulalia" };
diff --git a/PKHeX.Core/Saves/Substructures/Roamer3.cs b/PKHeX.Core/Saves/Substructures/Roamer3.cs
index b6f3d9a64..403453ce1 100644
--- a/PKHeX.Core/Saves/Substructures/Roamer3.cs
+++ b/PKHeX.Core/Saves/Substructures/Roamer3.cs
@@ -13,9 +13,11 @@ public Roamer3(SAV3 sav)
             SAV = sav;
             Offset = sav.GetBlockOffset(4);
             if (GameVersion.FRLG.Contains(SAV.Version))
-                Offset += 0x250; // 0x250 - FRLG
-            else
-                Offset += 0x35C; // 0x35C - RSE
+                Offset += 0x250;
+            else if (SAV.Version == GameVersion.E)
+                Offset += 0x35C;
+            else // RS
+                Offset += 0x2C4;
             IsGlitched = SAV.Version != GameVersion.E;
         }