diff --git a/PKHeX.Core/Legality/LegalityAnalysis.cs b/PKHeX.Core/Legality/LegalityAnalysis.cs
index fab82b258..b24fc6373 100644
--- a/PKHeX.Core/Legality/LegalityAnalysis.cs
+++ b/PKHeX.Core/Legality/LegalityAnalysis.cs
@@ -278,7 +278,7 @@ private void UpdateChecks()
             Contest.Verify(this);
 
             var format = pkm.Format;
-            if (format is 4 or 5)
+            if (format is 4 or 5 or 6)
                 Gen4EncounterType.Verify(this); // Gen 6->7 transfer deletes encounter type data
 
             if (format < 6)