diff --git a/PKHeX.Core/PKM/Searching/SearchUtil.cs b/PKHeX.Core/PKM/Searching/SearchUtil.cs
index bd732605d..98d4b7826 100644
--- a/PKHeX.Core/PKM/Searching/SearchUtil.cs
+++ b/PKHeX.Core/PKM/Searching/SearchUtil.cs
@@ -155,29 +155,39 @@ public static bool SatisfiesFilterNickname(PKM pk, ReadOnlySpan<char> nicknameSu
         return name.Contains(nicknameSubstring, StringComparison.OrdinalIgnoreCase);
     }
 
-    public static bool TrySeekNext(SaveFile sav, Func<PKM, bool> searchFilter, out (int Box, int Slot) result, int current = -1)
+    public static bool TrySeekNext(SaveFile sav, Func<PKM, bool> searchFilter, out (int Box, int Slot) result, int currentBox = -1, int currentSlot = -1, bool reverse = false)
     {
-        // Search from next box, wrapping around
-        var boxCount = sav.BoxCount;
-        var boxSlotCount = sav.BoxSlotCount;
-        var startBox = (current + 1) % boxCount;
-        for (int i = 0; i < boxCount; i++)
+        // Search from next slot, wrapping around
+        if (currentBox == -1)
+            currentBox = 0;
+
+        var step = reverse ? -1 : 1;
+        if (currentSlot == -1)
+            currentSlot = 0;
+        else
+            currentSlot += step;
+
+        var totalSlots = sav.SlotCount;
+        var index = currentBox * sav.BoxSlotCount + currentSlot;
+        if (index < 0)
+            index = totalSlots - 1;
+        else if (index >= totalSlots)
+            index = 0;
+
+        for (var i = 0; i < totalSlots; i++)
         {
-            var box = (startBox + i) % boxCount;
+            var actualIndex = (index + i * step + totalSlots) % totalSlots;
+            var pk = sav.GetBoxSlotAtIndex(actualIndex);
+            if (pk.Species == 0)
+                continue;
 
-            for (int slot = 0; slot < boxSlotCount; slot++)
-            {
-                var pk = sav.GetBoxSlotAtIndex(box, slot);
-                if (pk.Species == 0)
-                    continue;
+            if (!searchFilter(pk))
+                continue;
 
-                if (!searchFilter(pk))
-                    continue;
-
-                // Match found. Seek to the box, and Focus on the slot.
-                result = (box, slot);
-                return true;
-            }
+            // Match found. Seek to the box, and Focus on the slot.
+            sav.GetBoxSlotFromIndex(actualIndex, out var box, out var slot);
+            result = (box, slot);
+            return true;
         }
 
         // None found.
diff --git a/PKHeX.WinForms/Controls/SAV Editor/BoxEditor.cs b/PKHeX.WinForms/Controls/SAV Editor/BoxEditor.cs
index 292e9479a..860065eaf 100644
--- a/PKHeX.WinForms/Controls/SAV Editor/BoxEditor.cs	
+++ b/PKHeX.WinForms/Controls/SAV Editor/BoxEditor.cs	
@@ -355,18 +355,22 @@ public bool InitializeFromSAV(SaveFile sav)
 
     private Func<PKM, bool>? _searchFilter;
 
-    public void ApplySearchFilter(Func<PKM, bool>? searchFilter, bool isInit = false)
+    public void ApplySearchFilter(Func<PKM, bool>? searchFilter, bool reload = true)
     {
         _searchFilter = searchFilter;
-        if (isInit)
+        _lastSearchResult = null;    
+        if (!reload)
             return;
         ResetSlots();
     }
 
-    public void SeekNext(Func<PKM, bool> searchFilter)
+    private (int Box, int Slot)? _lastSearchResult;
+
+    public void SeekNext(Func<PKM, bool> searchFilter, bool reverse = false)
     {
         // Search from next box, wrapping around
-        if (!SearchUtil.TrySeekNext(SAV, searchFilter, out var result, CurrentBox))
+        var (box, slot) = _lastSearchResult ?? (CurrentBox, -1);
+        if (!SearchUtil.TrySeekNext(SAV, searchFilter, out var result, box, slot, reverse))
         {
             // Not found
             System.Media.SystemSounds.Exclamation.Play();
@@ -374,6 +378,8 @@ public void SeekNext(Func<PKM, bool> searchFilter)
         }
         CurrentBox = result.Box;
         BoxPokeGrid.Entries[result.Slot].Focus();
+        _lastSearchResult = result;
+
         System.Media.SystemSounds.Asterisk.Play();
     }
 }
diff --git a/PKHeX.WinForms/Controls/SAV Editor/SAVEditor.cs b/PKHeX.WinForms/Controls/SAV Editor/SAVEditor.cs
index 8d5cccb5b..710c2f624 100644
--- a/PKHeX.WinForms/Controls/SAV Editor/SAVEditor.cs	
+++ b/PKHeX.WinForms/Controls/SAV Editor/SAVEditor.cs	
@@ -1565,7 +1565,7 @@ private void B_SearchBox_Click(object sender, EventArgs e)
                 _searchForm.Hide();
                 return;
             }
-            if (ModifierKeys == Keys.Shift)
+            if (ModifierKeys.HasFlag(Keys.Shift))
             {
                 BoxSearchSeek();
                 return;
@@ -1632,7 +1632,7 @@ private void BoxSearchSeek()
     {
         if (_searchFilter is null)
             return;
-        Box.SeekNext(_searchFilter);
+        Box.SeekNext(_searchFilter, reverse: ModifierKeys.HasFlag(Keys.Control));
     }
 
     public void ApplyNewFilter(Func<PKM, bool>? filter, bool reload = true) => Box.ApplySearchFilter(filter, reload);