diff --git a/PKHeX.Core/Saves/Access/SaveBlockAccessor8LA.cs b/PKHeX.Core/Saves/Access/SaveBlockAccessor8LA.cs
index d0692c046..1c6fde717 100644
--- a/PKHeX.Core/Saves/Access/SaveBlockAccessor8LA.cs
+++ b/PKHeX.Core/Saves/Access/SaveBlockAccessor8LA.cs
@@ -65,7 +65,8 @@ public SaveBlockAccessor8LA(SAV8LA sav)
     private const uint KFashionUnlockedOverall = 0x45851092;
     private const uint KFashionUnlockedShoes = 0x636A5ABD;
     private const uint KFashionUnlockedGlasses = 0x58AB6233;
-    private const uint KSwarm = 0x1E0F1BA3; // 5 entries, 0x50 each
+    public const uint KMassOutbreak = 0x1E0F1BA3;
+    public const uint KMassiveMassOutbreak = 0x7799EB86;
     private const uint KCaptureRecords = 0x6506EE96; // 1000 entries, 0x1C each
     private const uint KOtherPlayerLostSatchels = 0x05E7EBEB;
     private const uint KMyLostSatchels = 0xC5D7112B;
diff --git a/PKHeX.Core/Saves/Substructures/Gen8/LA/AdventureStart8a.cs b/PKHeX.Core/Saves/Substructures/Gen8/LA/AdventureStart8a.cs
index f57be63d0..80f07b0be 100644
--- a/PKHeX.Core/Saves/Substructures/Gen8/LA/AdventureStart8a.cs
+++ b/PKHeX.Core/Saves/Substructures/Gen8/LA/AdventureStart8a.cs
@@ -1,6 +1,6 @@
 using System;
-using System.Buffers.Binary;
 using System.ComponentModel;
+using static System.Buffers.Binary.BinaryPrimitives;
 
 namespace PKHeX.Core;
 
@@ -17,8 +17,8 @@ public sealed class AdventureStart8a : SaveBlock
     /// </summary>
     public ulong Seconds
     {
-        get => BinaryPrimitives.ReadUInt64LittleEndian(Data.AsSpan(Offset));
-        set => BinaryPrimitives.WriteUInt64LittleEndian(Data.AsSpan(Offset), value);
+        get => ReadUInt64LittleEndian(Data.AsSpan(Offset));
+        set => WriteUInt64LittleEndian(Data.AsSpan(Offset), value);
     }
 
     private static DateTime Epoch => new(1970, 1, 1);
diff --git a/PKHeX.Core/Saves/Substructures/Gen8/LA/MyStatus8a.cs b/PKHeX.Core/Saves/Substructures/Gen8/LA/MyStatus8a.cs
index 88ead0176..1db3d48b3 100644
--- a/PKHeX.Core/Saves/Substructures/Gen8/LA/MyStatus8a.cs
+++ b/PKHeX.Core/Saves/Substructures/Gen8/LA/MyStatus8a.cs
@@ -1,6 +1,6 @@
 using System;
-using System.Buffers.Binary;
 using System.ComponentModel;
+using static System.Buffers.Binary.BinaryPrimitives;
 
 namespace PKHeX.Core;
 
@@ -14,14 +14,14 @@ public sealed class MyStatus8a : SaveBlock
 
     public int TID
     {
-        get => BinaryPrimitives.ReadUInt16LittleEndian(Data.AsSpan(0x10));
-        set => BinaryPrimitives.WriteUInt16LittleEndian(Data.AsSpan(0x10), (ushort)value);
+        get => ReadUInt16LittleEndian(Data.AsSpan(0x10));
+        set => WriteUInt16LittleEndian(Data.AsSpan(0x10), (ushort)value);
     }
 
     public int SID
     {
-        get => BinaryPrimitives.ReadUInt16LittleEndian(Data.AsSpan(0x12));
-        set => BinaryPrimitives.WriteUInt16LittleEndian(Data.AsSpan(0x12), (ushort)value);
+        get => ReadUInt16LittleEndian(Data.AsSpan(0x12));
+        set => WriteUInt16LittleEndian(Data.AsSpan(0x12), (ushort)value);
     }
 
     public int Game
diff --git a/PKHeX.Core/Saves/Substructures/Inventory/Item/InventoryItem8a.cs b/PKHeX.Core/Saves/Substructures/Inventory/Item/InventoryItem8a.cs
index 743cc5235..d3f642de8 100644
--- a/PKHeX.Core/Saves/Substructures/Inventory/Item/InventoryItem8a.cs
+++ b/PKHeX.Core/Saves/Substructures/Inventory/Item/InventoryItem8a.cs
@@ -1,5 +1,5 @@
 using System;
-using System.Buffers.Binary;
+using static System.Buffers.Binary.BinaryPrimitives;
 
 namespace PKHeX.Core;
 
@@ -17,15 +17,15 @@ public override void Clear()
 
     public static InventoryItem8a Read(ReadOnlySpan<byte> data) => new()
     {
-        Index = BinaryPrimitives.ReadInt16LittleEndian(data),
-        Count = BinaryPrimitives.ReadInt16LittleEndian(data[2..]),
+        Index = ReadInt16LittleEndian(data),
+        Count = ReadInt16LittleEndian(data[2..]),
     };
 
     public void Write(Span<byte> data)
     {
         // Index is not saved.
-        BinaryPrimitives.WriteUInt16LittleEndian(data, (ushort)Index);
-        BinaryPrimitives.WriteUInt16LittleEndian(data[2..], (ushort)Count);
+        WriteUInt16LittleEndian(data, (ushort)Index);
+        WriteUInt16LittleEndian(data[2..], (ushort)Count);
     }
 
     public static void Clear(Span<byte> data, int offset) => data.Slice(offset, SIZE).Clear();