diff --git a/PKHeX.Core/Saves/SAV4BR.cs b/PKHeX.Core/Saves/SAV4BR.cs
index 6b2414906..daf781bf3 100644
--- a/PKHeX.Core/Saves/SAV4BR.cs
+++ b/PKHeX.Core/Saves/SAV4BR.cs
@@ -38,7 +38,12 @@ public int CurrentSlot
         }
     }
 
-    public SAV4BR() : base(SIZE_SLOT) => ClearBoxes();
+    public SAV4BR() : base(SIZE_SLOT)
+    {
+        Container = new byte[SIZE_HALF];
+        _currentSlot = 0;
+        ClearBoxes();
+    }
 
     public SAV4BR(Memory<byte> data, bool decrypt = true) : base(new byte[SIZE_SLOT])
     {
diff --git a/PKHeX.Core/Saves/Util/SaveFileType.cs b/PKHeX.Core/Saves/Util/SaveFileType.cs
index eec9c020d..d64dd1d38 100644
--- a/PKHeX.Core/Saves/Util/SaveFileType.cs
+++ b/PKHeX.Core/Saves/Util/SaveFileType.cs
@@ -70,6 +70,7 @@ public static class SaveFileTypeExtensions
         GameVersion.D or GameVersion.P => DP,
         GameVersion.Pt => Pt,
         GameVersion.HG or GameVersion.SS => HGSS,
+        GameVersion.BATREV => BattleRevolution,
         GameVersion.B or GameVersion.W => BW,
         GameVersion.B2 or GameVersion.W2 => B2W2,
         GameVersion.X or GameVersion.Y => XY,