diff --git a/PKHeX.Core/PKM/PK1.cs b/PKHeX.Core/PKM/PK1.cs
index 3dec5010a..75a2ea88b 100644
--- a/PKHeX.Core/PKM/PK1.cs
+++ b/PKHeX.Core/PKM/PK1.cs
@@ -23,7 +23,7 @@ public sealed class PK1 : PKM
         private int StringLength => Japanese ? STRLEN_J : STRLEN_U;
 
         private string GetString(int Offset, int Count) => StringConverter.GetString1(Data, Offset, Count, Japanese);
-        private byte[] SetString(string value, int maxLength) => StringConverter.SetString1(value, maxLength, Japanese);
+        private byte[] SetString(string value, int maxLength) => StringConverter.SetString1(value, maxLength - 1, Japanese);
 
         // Trash Bytes
         public override byte[] Nickname_Trash { get => nick; set { if (value?.Length == nick.Length) nick = value; } }
diff --git a/PKHeX.Core/PKM/PK2.cs b/PKHeX.Core/PKM/PK2.cs
index d2dbdd177..538d36c69 100644
--- a/PKHeX.Core/PKM/PK2.cs
+++ b/PKHeX.Core/PKM/PK2.cs
@@ -33,8 +33,8 @@ private string GetString(int Offset, int Count)
         private byte[] SetString(string value, int maxLength)
         {
             if (Korean)
-                return StringConverter.SetString2KOR(value, maxLength);
-            return StringConverter.SetString1(value, maxLength, Japanese);
+                return StringConverter.SetString2KOR(value, maxLength - 1);
+            return StringConverter.SetString1(value, maxLength - 1, Japanese);
         }
 
         // Trash Bytes