diff --git a/PKHeX.Core/PKM/BK4.cs b/PKHeX.Core/PKM/BK4.cs
index 13079e7a3..0b7a272fb 100644
--- a/PKHeX.Core/PKM/BK4.cs
+++ b/PKHeX.Core/PKM/BK4.cs
@@ -189,7 +189,7 @@ public override uint EXP
         #endregion
 
         #region Block C
-        public override string Nickname { get => GetString(0x48, 24); set => SetString(value, 11).CopyTo(Data, 0x48); }
+        public override string Nickname { get => GetString(0x48, 20); set => SetString(value, 10).CopyTo(Data, 0x48); }
         // 0x5E unused
         public override int Version { get => Data[0x5F]; set => Data[0x5F] = (byte)value; }
         private byte RIB8 { get => Data[0x60]; set => Data[0x60] = value; } // Sinnoh 3
@@ -232,7 +232,7 @@ public override uint EXP
         #endregion
 
         #region Block D
-        public override string OT_Name { get => GetString(0x68, 16); set => SetString(value, 7).CopyTo(Data, 0x68); }
+        public override string OT_Name { get => GetString(0x68, 14); set => SetString(value, 7).CopyTo(Data, 0x68); }
         public override int Egg_Year { get => Data[0x78]; set => Data[0x78] = (byte)value; }
         public override int Egg_Month { get => Data[0x79]; set => Data[0x79] = (byte)value; }
         public override int Egg_Day { get => Data[0x7A]; set => Data[0x7A] = (byte)value; }
diff --git a/PKHeX.Core/PKM/PK4.cs b/PKHeX.Core/PKM/PK4.cs
index 5cfec847c..297fc9b70 100644
--- a/PKHeX.Core/PKM/PK4.cs
+++ b/PKHeX.Core/PKM/PK4.cs
@@ -168,7 +168,7 @@ private static byte[] DecryptParty(byte[] data)
         #endregion
 
         #region Block C
-        public override string Nickname { get => GetString(0x48, 22); set => SetString(value, 11).CopyTo(Data, 0x48); }
+        public override string Nickname { get => GetString(0x48, 20); set => SetString(value, 10).CopyTo(Data, 0x48); }
         // 0x5E unused
         public override int Version { get => Data[0x5F]; set => Data[0x5F] = (byte)value; }
         private byte RIB8 { get => Data[0x60]; set => Data[0x60] = value; } // Sinnoh 3
@@ -211,7 +211,7 @@ private static byte[] DecryptParty(byte[] data)
         #endregion
 
         #region Block D
-        public override string OT_Name { get => GetString(0x68, 16); set => SetString(value, 7).CopyTo(Data, 0x68); }
+        public override string OT_Name { get => GetString(0x68, 14); set => SetString(value, 7).CopyTo(Data, 0x68); }
         public override int Egg_Year { get => Data[0x78]; set => Data[0x78] = (byte)value; }
         public override int Egg_Month { get => Data[0x79]; set => Data[0x79] = (byte)value; }
         public override int Egg_Day { get => Data[0x7A]; set => Data[0x7A] = (byte)value; }
diff --git a/PKHeX.Core/PKM/PK5.cs b/PKHeX.Core/PKM/PK5.cs
index 9058207c2..6e1baaffd 100644
--- a/PKHeX.Core/PKM/PK5.cs
+++ b/PKHeX.Core/PKM/PK5.cs
@@ -186,7 +186,7 @@ private static byte[] DecryptParty(byte[] data)
         #endregion
 
         #region Block C
-        public override string Nickname { get => GetString(0x48, 22); set => SetString(value, 11).CopyTo(Data, 0x48); }
+        public override string Nickname { get => GetString(0x48, 20); set => SetString(value, 10).CopyTo(Data, 0x48); }
         // 0x5E unused
         public override int Version { get => Data[0x5F]; set => Data[0x5F] = (byte)value; }
         private byte RIB8 { get => Data[0x60]; set => Data[0x60] = value; } // Sinnoh 3
@@ -229,7 +229,7 @@ private static byte[] DecryptParty(byte[] data)
         #endregion
 
         #region Block D
-        public override string OT_Name { get => GetString(0x68, 0x16); set => SetString(value, 7).CopyTo(Data, 0x68); }
+        public override string OT_Name { get => GetString(0x68, 14); set => SetString(value, 7).CopyTo(Data, 0x68); }
         public override int Egg_Year { get => Data[0x78]; set => Data[0x78] = (byte)value; }
         public override int Egg_Month { get => Data[0x79]; set => Data[0x79] = (byte)value; }
         public override int Egg_Day { get => Data[0x7A]; set => Data[0x7A] = (byte)value; }