diff --git a/PKHeX.WinForms/Subforms/KChart.cs b/PKHeX.WinForms/Subforms/KChart.cs
index 1ebd29518..5aeafdbba 100644
--- a/PKHeX.WinForms/Subforms/KChart.cs
+++ b/PKHeX.WinForms/Subforms/KChart.cs
@@ -90,7 +90,7 @@ private static bool GetIsNative(PersonalInfo personalInfo, int s)
             return personalInfo switch
             {
                 PersonalInfoSM _ => s > 721 || Legal.PastGenAlolanNatives.Contains(s),
-                PersonalInfoSWSH ss => ss.PokeDexIndex > 0,
+                PersonalInfoSWSH ss => ss.IsInDex,
                 _ => true,
             };
         }