diff --git a/pk3DS/Subforms/Gen6/Experimental/OWSE.Designer.cs b/pk3DS/Subforms/Gen6/Experimental/OWSE.Designer.cs
index 73d030a..9d5a279 100644
--- a/pk3DS/Subforms/Gen6/Experimental/OWSE.Designer.cs
+++ b/pk3DS/Subforms/Gen6/Experimental/OWSE.Designer.cs
@@ -1,6 +1,6 @@
 namespace pk3DS
 {
-    partial class OWSE
+    sealed partial class OWSE
     {
         /// <summary>
         /// Required designer variable.
diff --git a/pk3DS/Subforms/Gen6/Experimental/OWSE.cs b/pk3DS/Subforms/Gen6/Experimental/OWSE.cs
index 68f9c86..b8488ea 100644
--- a/pk3DS/Subforms/Gen6/Experimental/OWSE.cs
+++ b/pk3DS/Subforms/Gen6/Experimental/OWSE.cs
@@ -10,7 +10,7 @@
 
 namespace pk3DS
 {
-    public partial class OWSE : Form
+    public sealed partial class OWSE : Form
     {
         public OWSE()
         {
diff --git a/pk3DS/Subforms/Gen6/TitleScreenEditor6.Designer.cs b/pk3DS/Subforms/Gen6/TitleScreenEditor6.Designer.cs
index 4c64766..b530793 100644
--- a/pk3DS/Subforms/Gen6/TitleScreenEditor6.Designer.cs
+++ b/pk3DS/Subforms/Gen6/TitleScreenEditor6.Designer.cs
@@ -1,6 +1,6 @@
 namespace pk3DS
 {
-    partial class TitleScreenEditor6
+    sealed partial class TitleScreenEditor6
     {
         /// <summary>
         /// Required designer variable.
diff --git a/pk3DS/Subforms/Gen6/TitleScreenEditor6.cs b/pk3DS/Subforms/Gen6/TitleScreenEditor6.cs
index 4e928a5..63a2063 100644
--- a/pk3DS/Subforms/Gen6/TitleScreenEditor6.cs
+++ b/pk3DS/Subforms/Gen6/TitleScreenEditor6.cs
@@ -9,7 +9,7 @@
 
 namespace pk3DS
 {
-    public partial class TitleScreenEditor6 : Form
+    public sealed partial class TitleScreenEditor6 : Form
     {
         private readonly bool compressed = Main.Config.ORAS;
         public TitleScreenEditor6()
diff --git a/pk3DS/Tools/Icon.Designer.cs b/pk3DS/Tools/Icon.Designer.cs
index 0e93d5d..299f18e 100644
--- a/pk3DS/Tools/Icon.Designer.cs
+++ b/pk3DS/Tools/Icon.Designer.cs
@@ -1,6 +1,6 @@
 namespace pk3DS
 {
-    partial class Icon
+    sealed partial class Icon
     {
         /// <summary>
         /// Required designer variable.
diff --git a/pk3DS/Tools/Icon.cs b/pk3DS/Tools/Icon.cs
index 957f490..5006076 100644
--- a/pk3DS/Tools/Icon.cs
+++ b/pk3DS/Tools/Icon.cs
@@ -7,7 +7,7 @@
 
 namespace pk3DS
 {
-    public partial class Icon : Form
+    public sealed partial class Icon : Form
     {
         private SMDH SMDH;
         public Icon()
diff --git a/pk3DS/Tools/ToolsUI.Designer.cs b/pk3DS/Tools/ToolsUI.Designer.cs
index 8593ed5..70ae342 100644
--- a/pk3DS/Tools/ToolsUI.Designer.cs
+++ b/pk3DS/Tools/ToolsUI.Designer.cs
@@ -1,6 +1,6 @@
 namespace pk3DS
 {
-    partial class ToolsUI
+    sealed partial class ToolsUI
     {
         /// <summary>
         /// Required designer variable.
diff --git a/pk3DS/Tools/ToolsUI.cs b/pk3DS/Tools/ToolsUI.cs
index 34fba12..928df1d 100644
--- a/pk3DS/Tools/ToolsUI.cs
+++ b/pk3DS/Tools/ToolsUI.cs
@@ -11,7 +11,7 @@
 
 namespace pk3DS
 {
-    public partial class ToolsUI : Form
+    public sealed partial class ToolsUI : Form
     {
         public ToolsUI()
         {