diff --git a/PKHeX.Core/Legality/Tables/AltFormInfo.cs b/PKHeX.Core/Legality/Tables/AltFormInfo.cs
index b0ab6edd6..9c9d2cb3f 100644
--- a/PKHeX.Core/Legality/Tables/AltFormInfo.cs
+++ b/PKHeX.Core/Legality/Tables/AltFormInfo.cs
@@ -32,7 +32,7 @@ public static bool IsBattleOnlyForm(int species, int form, int format)
                     return false;
 
                 default:
-                    return true;
+                    return form != 0;
             }
         }