sealed

sealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealedsealed

PKHeX.Core/Editing/Bulk/BatchEditor.cs

@@ -9,7 +9,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Carries out a batch edit and contains information summarizing the results.
     /// </summary>
-    public class BatchEditor
+    public sealed class BatchEditor
     {
         private int Modified { get; set; }
         private int Iterated { get; set; }

PKHeX.Core/Editing/Bulk/StringInstruction.cs

@@ -14,7 +14,7 @@ namespace PKHeX.Core
     /// <see cref="Exclude"/>
     /// <see cref="Require"/>
     /// <see cref="Apply"/>
-    public class StringInstruction
+    public sealed class StringInstruction
     {
         public string PropertyName { get; private set; }
         public string PropertyValue { get; private set; }

PKHeX.Core/Editing/Bulk/StringInstructionSet.cs

@@ -6,7 +6,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Processes input of strings into a list of valid Filters and Instructions.
     /// </summary>
-    public class StringInstructionSet
+    public sealed class StringInstructionSet
     {
         public IList<StringInstruction> Filters { get; private set; }
         public IList<StringInstruction> Instructions { get; private set; }

PKHeX.Core/Editing/PKM/LegalMoveSource.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Legal Move information for a single <see cref="PKM"/>, for indicating if a move is legal or not.
     /// </summary>
-    public class LegalMoveSource
+    public sealed class LegalMoveSource
     {
         public readonly IList<bool> IsMoveBoxOrdered = new bool[4];
         public IReadOnlyList<ComboItem> DataSource => (ComboItem[])MoveDataAllowed.Clone();

PKHeX.Core/Editing/PKM/PKMSummary.cs

@@ -5,7 +5,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Bindable summary object that can fetch strings that summarize a <see cref="PKM"/>.
     /// </summary>
-    public class PKMSummary
+    public class PKMSummary // do NOT seal, allow inheritance
     {
         private static readonly IReadOnlyList<string> GenderSymbols = GameInfo.GenderSymbolASCII;
 

PKHeX.Core/Editing/Saves/Editors/EventWork/EventFlag.cs

@@ -5,7 +5,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Event Flag that toggles certain features / entities on and off.
     /// </summary>
-    public class EventFlag : EventVar
+    public sealed class EventFlag : EventVar
     {
         public bool Flag;
 

PKHeX.Core/Editing/Saves/Editors/EventWork/EventVar.cs

@@ -3,7 +3,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Event variable used to determine game events.
     /// </summary>
-    public class EventVar
+    public abstract class EventVar
     {
         /// <summary>
         /// Name of event variable

PKHeX.Core/Editing/Saves/Editors/EventWork/EventWork.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// Event number storage for more complex logic events.
     /// </summary>
     /// <typeparam name="T"></typeparam>
-    public class EventWork<T> : EventVar
+    public sealed class EventWork<T> : EventVar
     {
         public T Value;
         public readonly IList<EventWorkVal> Options = new List<EventWorkVal> { new EventWorkVal() };

PKHeX.Core/Editing/Saves/Editors/EventWork/EventWorkVal.cs

@@ -3,7 +3,7 @@
     /// <summary>
     /// Represents a known value for a <see cref="EventWork{T}"/> of type <see cref="int"/>.
     /// </summary>
-    public class EventWorkVal
+    public sealed class EventWorkVal
     {
         public readonly bool Custom;
         public readonly string Text;

PKHeX.Core/Editing/Saves/Editors/EventWork/SplitEventEditor.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// Editor object that unpacks <see cref="EventWork{T}"/> into flags & work groups, and handles value get/set operations.
     /// </summary>
     /// <typeparam name="T"></typeparam>
-    public class SplitEventEditor<T>
+    public sealed class SplitEventEditor<T>
     {
         public readonly IList<EventVarGroup> Work;
         public readonly IList<EventVarGroup> Flag;

PKHeX.Core/Editing/Saves/Editors/SaveDataEditor.cs

@@ -4,7 +4,7 @@
     /// Environment for editing a <see cref="SaveFile"/>
     /// </summary>
     /// <typeparam name="T"></typeparam>
-    public class SaveDataEditor<T>
+    public sealed class SaveDataEditor<T>
     {
         public readonly SaveFile SAV;
         public readonly SlotEditor<T> Slots;

PKHeX.Core/Editing/Saves/Slots/BoxEdit.cs

@@ -5,7 +5,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Represents a Box Editor that loads the contents for easy manipulation.
     /// </summary>
-    public class BoxEdit
+    public sealed class BoxEdit
     {
         private readonly SaveFile SAV;
         private readonly PKM[] CurrentContents;

PKHeX.Core/Editing/Saves/Slots/SlotChangelog.cs

@@ -5,7 +5,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Tracks <see cref="PKM"/> slot changes and provides the ability to revert a change.
     /// </summary>
-    public class SlotChangelog
+    public sealed class SlotChangelog
     {
         private readonly SaveFile SAV;
         private readonly Stack<SlotReversion> UndoStack = new Stack<SlotReversion>();

PKHeX.Core/Editing/Saves/Slots/SlotViewInfo.cs

@@ -4,7 +4,7 @@ namespace PKHeX.Core
     /// Tuple containing data for a <see cref="Slot"/> and the originating <see cref="View"/>
     /// </summary>
     /// <typeparam name="T"></typeparam>
-    public class SlotViewInfo<T>
+    public sealed class SlotViewInfo<T>
     {
         public ISlotInfo Slot;
         public ISlotViewer<T> View;

PKHeX.Core/Editing/ShowdownSet.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Logic for exporting and importing <see cref="PKM"/> data in Pokémon Showdown's text format.
     /// </summary>
-    public class ShowdownSet
+    public sealed class ShowdownSet
     {
         private static readonly string[] genders = {"M", "F", ""};
         private static readonly string[] genderForms = {"", "F", ""};

PKHeX.Core/Game/GameStrings/FilteredGameDataSource.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// <summary>
     /// <see cref="SaveFile"/> sensitive provider for <see cref="ComboItem"/> data sources.
     /// </summary>
-    public class FilteredGameDataSource
+    public sealed class FilteredGameDataSource
     {
         public FilteredGameDataSource(SaveFile sav, GameDataSource source, bool HaX = false)
         {

PKHeX.Core/Game/GameStrings/GameDataSource.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Bundles raw string inputs into lists that can be used in data binding.
     /// </summary>
-    public class GameDataSource
+    public sealed class GameDataSource
     {
         public static readonly IReadOnlyList<ComboItem> Regions = Util.GetCSVUnsortedCBList("regions3ds");
         public static readonly IReadOnlyList<ComboItem> LanguageList = Util.GetCSVUnsortedCBList("languages");

PKHeX.Core/Game/GameStrings/GameStrings.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Repository of localized game strings for a given <see cref="LanguageID"/>.
     /// </summary>
-    public class GameStrings : IBasicStrings
+    public sealed class GameStrings : IBasicStrings
     {
         // PKM Info
         public readonly string[] specieslist, movelist, itemlist, abilitylist, types, natures, forms,

PKHeX.Core/Game/GameStrings/MemoryStrings.cs

@@ -4,7 +4,7 @@
 
 namespace PKHeX.Core
 {
-    public class MemoryStrings
+    public sealed class MemoryStrings
     {
         private readonly GameStrings s;
 

PKHeX.Core/Legality/BulkAnalysis.cs

@@ -8,7 +8,7 @@
 
 namespace PKHeX.Core
 {
-    public class BulkAnalysis
+    public sealed class BulkAnalysis
     {
         public readonly IReadOnlyList<PKM> AllData;
         public readonly IReadOnlyList<LegalityAnalysis> AllAnalysis;

PKHeX.Core/Legality/Encounters/Generator/EncounterCriteria.cs

@@ -3,7 +3,7 @@
     /// <summary>
     /// Object that can be fed to a <see cref="IEncounterable"/> converter to ensure that the resulting <see cref="PKM"/> meets rough specifications.
     /// </summary>
-    public class EncounterCriteria
+    public sealed class EncounterCriteria
     {
         public static readonly EncounterCriteria Unrestricted = new EncounterCriteria();
 

PKHeX.Core/Legality/Encounters/Generator/PeekEnumerator.cs

@@ -8,7 +8,7 @@ namespace PKHeX.Core
     /// Iterates a generic collection with the ability to peek into the collection to see if the next element exists.
     /// </summary>
     /// <typeparam name="T">Generic Collection Element Type</typeparam>
-    public class PeekEnumerator<T> : IEnumerator<T>
+    public sealed class PeekEnumerator<T> : IEnumerator<T>
     {
         private readonly IEnumerator<T> Enumerator;
         private T peek;

PKHeX.Core/Legality/Encounters/Information/ValidEncounterMoves.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Object which stores information useful for analyzing a moveset relative to the encounter data.
     /// </summary>
-    public class ValidEncounterMoves
+    public sealed class ValidEncounterMoves
     {
         public List<int>[] LevelUpMoves { get; } = Empty;
         public List<int>[] TMHMMoves { get; } = Empty;
@@ -30,7 +30,7 @@ public ValidEncounterMoves(List<int>[] levelup)
         }
     }
 
-    public class LevelUpRestriction
+    public sealed class LevelUpRestriction
     {
         public readonly IReadOnlyList<EvoCriteria>[] EvolutionChains;
         public readonly int MinimumLevelGen1;

PKHeX.Core/Legality/Moves/LearnLookup.cs

@@ -8,7 +8,7 @@ namespace PKHeX.Core
     /// <summary>
     /// LevelUp Lookup object
     /// </summary>
-    public class LearnLookup
+    public sealed class LearnLookup
     {
         private readonly GameVersion Version;
         private readonly PersonalTable Table;

PKHeX.Core/Legality/RNG/Frame/Frame.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class Frame
+    public sealed class Frame
     {
         /// <summary>
         /// Ending seed value for the frame (prior to nature call).

PKHeX.Core/Legality/RNG/Frame/FrameCache.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Frame List used to cache <see cref="RNG"/> results.
     /// </summary>
-    public class FrameCache
+    public sealed class FrameCache
     {
         private const int DefaultSize = 32;
         private readonly List<uint> Seeds = new List<uint>(DefaultSize);

PKHeX.Core/Legality/RNG/Frame/FrameGenerator.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class FrameGenerator
+    public sealed class FrameGenerator
     {
         public uint Nature;
         public readonly bool Gendered;

PKHeX.Core/Legality/RNG/Locks/TeamLock.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class TeamLock
+    public sealed class TeamLock
     {
         public int Species;
         public string Comment;

PKHeX.Core/Legality/RNG/PIDIV.cs

@@ -16,7 +16,7 @@ public class PIDIV
         public PIDType Type;
     }
 
-    public class PIDIVTSV : PIDIV
+    public sealed class PIDIVTSV : PIDIV
     {
         public int TSV1 { get; internal set; } = -1;
         public int TSV2 { get; internal set; } = -1;

PKHeX.Core/Legality/Structures/CheckMoveResult.cs

@@ -23,7 +23,7 @@ public enum MoveSource
     /// <summary>
     /// Move specific <see cref="CheckResult"/> to contain in which Generation it was learned &amp; source.
     /// </summary>
-    public class CheckMoveResult : CheckResult
+    public sealed class CheckMoveResult : CheckResult
     {
         public readonly MoveSource Source;
         public readonly int Generation;

PKHeX.Core/Legality/Structures/SimpleTrainerInfo.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class SimpleTrainerInfo : ITrainerInfo
+    public sealed class SimpleTrainerInfo : ITrainerInfo
     {
         public string OT { get; set; } = "PKHeX";
         public int TID { get; set; } = 12345;

PKHeX.Core/MysteryGifts/PL6.cs

@@ -11,7 +11,7 @@ namespace PKHeX.Core
     /// This Template object is very similar to the <see cref="PCD"/> structure in that it stores more data than just the gift.
     /// This template object is only present in Generation 6 save files.
     /// </remarks>
-    public class PL6
+    public sealed class PL6
     {
         public const int Size = 0xA47;
         public const string Filter = "Pokémon Link Data|*.pl6|All Files (*.*)|*.*";
@@ -131,7 +131,7 @@ public int[] Quantities
     /// This Template object is very similar to the <see cref="WC6"/> structure and similar objects, in that the structure offsets are ordered the same.
     /// This template object is only present in Generation 6 save files.
     /// </remarks>
-    public class PL6_PKM : IRibbonSetEvent3, IRibbonSetEvent4
+    public sealed class PL6_PKM : IRibbonSetEvent3, IRibbonSetEvent4
     {
         internal const int Size = 0xA0;
 

PKHeX.Core/MysteryGifts/WC3.cs

@@ -10,7 +10,7 @@ namespace PKHeX.Core
     /// This is fabricated data built to emulate the future generation Mystery Gift objects.
     /// Data here is not stored in any save file and cannot be naturally exported.
     /// </remarks>
-    public class WC3 : MysteryGift, IRibbonSetEvent3, IVersion
+    public sealed class WC3 : MysteryGift, IRibbonSetEvent3, IVersion
     {
         /// <summary>
         /// Matched <see cref="PIDIV"/> Type

PKHeX.Core/MysteryGifts/WR7.cs

@@ -11,7 +11,7 @@ namespace PKHeX.Core
     /// A full <see cref="WB7"/> is not stored in the <see cref="SAV7b"/> structure, as it is immediately converted to <see cref="PKM"/> upon receiving from server.
     /// The save file just stores a summary of the received data for the user to look back at.
     /// </remarks>
-    public class WR7 : MysteryGift
+    public sealed class WR7 : MysteryGift
     {
         public const int Size = 0x140;
 

PKHeX.Core/PKM/Searching/SearchSettings.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core.Searching
     /// <summary>
     /// <see cref="PKM"/> search settings &amp; searcher
     /// </summary>
-    public class SearchSettings
+    public sealed class SearchSettings
     {
         public int Format { private get; set; }
         public int Generation { private get; set; }

PKHeX.Core/PKM/Shared/QRPK7.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class QRPK7
+    public sealed class QRPK7
     {
         private readonly byte[] Data;
 

PKHeX.Core/PersonalInfo/PersonalInfoB2W2.cs

@@ -3,7 +3,7 @@
     /// <summary>
     /// <see cref="PersonalInfo"/> class with values from the Black 2 &amp; White 2 games.
     /// </summary>
-    public class PersonalInfoB2W2 : PersonalInfoBW
+    public sealed class PersonalInfoB2W2 : PersonalInfoBW
     {
         public new const int SIZE = 0x4C;
 

PKHeX.Core/PersonalInfo/PersonalInfoG1.cs

@@ -3,9 +3,8 @@
     /// <summary>
     /// <see cref="PersonalInfo"/> class with values from Generation 1 games.
     /// </summary>
-    public class PersonalInfoG1 : PersonalInfo
+    public sealed class PersonalInfoG1 : PersonalInfo
     {
-        protected PersonalInfoG1() { }
         public const int SIZE = 0x1C;
 
         public PersonalInfoG1(byte[] data)

PKHeX.Core/PersonalInfo/PersonalInfoG2.cs

@@ -3,9 +3,8 @@
     /// <summary>
     /// <see cref="PersonalInfo"/> class with values from Generation 2 games.
     /// </summary>
-    public class PersonalInfoG2 : PersonalInfo
+    public sealed class PersonalInfoG2 : PersonalInfo
     {
-        protected PersonalInfoG2() { }
         public const int SIZE = 0x20;
 
         public PersonalInfoG2(byte[] data)

PKHeX.Core/PersonalInfo/PersonalInfoG4.cs

@@ -5,7 +5,7 @@ namespace PKHeX.Core
     /// <summary>
     /// <see cref="PersonalInfo"/> class with values from Generation 4 games.
     /// </summary>
-    public class PersonalInfoG4 : PersonalInfoG3
+    public sealed class PersonalInfoG4 : PersonalInfoG3
     {
         public new const int SIZE = 0x2C;
 

PKHeX.Core/PersonalInfo/PersonalInfoORAS.cs

@@ -3,7 +3,7 @@
     /// <summary>
     /// <see cref="PersonalInfo"/> class with values from the OR &amp; AS games.
     /// </summary>
-    public class PersonalInfoORAS : PersonalInfoXY
+    public sealed class PersonalInfoORAS : PersonalInfoXY
     {
         public new const int SIZE = 0x50;
 

PKHeX.Core/PersonalInfo/PersonalInfoSWSH.cs

@@ -5,7 +5,7 @@ namespace PKHeX.Core
     /// <summary>
     /// <see cref="PersonalInfo"/> class with values from the <see cref="GameVersion.SWSH"/> games.
     /// </summary>
-    public class PersonalInfoSWSH : PersonalInfoSM
+    public sealed class PersonalInfoSWSH : PersonalInfoSM
     {
         public new const int SIZE = PersonalInfoSM.SIZE;
 

PKHeX.Core/Saves/SAV3.cs

@@ -898,7 +898,7 @@ private void LoadEReaderBerryData()
         #endregion
 
         // RTC
-        public class RTC3
+        public sealed class RTC3
         {
             public readonly byte[] Data;
             private const int Size = 8;

PKHeX.Core/Saves/SAV5B2W2.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class SAV5B2W2 : SAV5
+    public sealed class SAV5B2W2 : SAV5
     {
         public SAV5B2W2() : base(SaveUtil.SIZE_G5RAW) => Initialize();
         public SAV5B2W2(byte[] data) : base(data) => Initialize();

PKHeX.Core/Saves/SAV5BW.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class SAV5BW : SAV5
+    public sealed class SAV5BW : SAV5
     {
         public SAV5BW() : base(SaveUtil.SIZE_G5RAW) => Initialize();
         public SAV5BW(byte[] data) : base(data) => Initialize();

PKHeX.Core/Saves/SAV7SM.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class SAV7SM : SAV7
+    public sealed class SAV7SM : SAV7
     {
         public SAV7SM(byte[] data) : base(data, BlocksSM, boSM) => Initialize();
         public SAV7SM() : base(SaveUtil.SIZE_G7SM, BlocksSM, boSM) => Initialize();

PKHeX.Core/Saves/SAV7USUM.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class SAV7USUM : SAV7
+    public sealed class SAV7USUM : SAV7
     {
         public SAV7USUM(byte[] data) : base(data, BlocksUSUM, boUU)
         {

PKHeX.Core/Saves/SAV8SWSH.cs

@@ -3,7 +3,7 @@
     /// <summary>
     /// Generation 8 <see cref="SaveFile"/> object for <see cref="GameVersion.SWSH"/> games.
     /// </summary>
-    public class SAV8SWSH : SAV8
+    public sealed class SAV8SWSH : SAV8
     {
         public SAV8SWSH(byte[] data) : base(data, BlocksSWSH, boSWSH) => Initialize();
         public SAV8SWSH() : base(SaveUtil.SIZE_G8SWSH, BlocksSWSH, boSWSH) => Initialize();

PKHeX.Core/Saves/Substructures/Battle Videos/BV6.cs

@@ -4,7 +4,7 @@
 
 namespace PKHeX.Core
 {
-    public class BV6 : BattleVideo
+    public sealed class BV6 : BattleVideo
     {
         internal const int SIZE = 0x2E60;
 

PKHeX.Core/Saves/Substructures/Battle Videos/BV7.cs

@@ -4,7 +4,7 @@
 
 namespace PKHeX.Core
 {
-    public class BV7 : BattleVideo
+    public sealed class BV7 : BattleVideo
     {
         internal const int SIZE = 0x2BC0;
 

PKHeX.Core/Saves/Substructures/Gen12/G1OverworldSpawner.cs

@@ -3,7 +3,7 @@
 
 namespace PKHeX.Core
 {
-    public class G1OverworldSpawner
+    public sealed class G1OverworldSpawner
     {
         private readonly SAV1 SAV;
         private readonly bool[] EventFlags;
@@ -73,7 +73,7 @@ public G1OverworldSpawner(SAV1 sav)
         private FlagPair FlagSquirtle { get; }
         private FlagPair FlagCharmander { get; }
 
-        public class FlagPair
+        public sealed class FlagPair
         {
             public string Name { get; internal set; }
 

PKHeX.Core/Saves/Substructures/Gen3/HallFame3.cs

@@ -3,7 +3,7 @@
 
 namespace PKHeX.Core
 {
-    public class HallFame3Entry
+    public sealed class HallFame3Entry
     {
         private readonly byte[] Parent;
         private readonly bool Japanese;
@@ -64,7 +64,7 @@ public static void SetEntries(SAV3 sav, HallFame3Entry[] entries)
         }
     }
 
-    public class HallFame3PKM
+    public sealed class HallFame3PKM
     {
         public const int SIZE = 20;
 

PKHeX.Core/Saves/Substructures/Gen3/PokeBlock3.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class PokeBlock3
+    public sealed class PokeBlock3
     {
         public const int SIZE = 7;
         private readonly byte[] Data;

PKHeX.Core/Saves/Substructures/Gen3/PokeBlock3Case.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class PokeBlock3Case
+    public sealed class PokeBlock3Case
     {
         private const int Count = 40;
         public readonly PokeBlock3[] Blocks;

PKHeX.Core/Saves/Substructures/Gen3/Roamer3.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class Roamer3 : IContestStats
+    public sealed class Roamer3 : IContestStats
     {
         private readonly SaveFile SAV;
         private readonly int Offset;

PKHeX.Core/Saves/Substructures/Gen3/SecretBase3.cs

@@ -1,9 +1,8 @@
 using System;
-using System.Linq;
 
 namespace PKHeX.Core
 {
-    public class SecretBase3
+    public sealed class SecretBase3
     {
         private readonly byte[] Data;
         private readonly int Offset;

PKHeX.Core/Saves/Substructures/Gen3/SecretBase3PKM.cs

@@ -3,7 +3,7 @@
 
 namespace PKHeX.Core
 {
-    public class SecretBase3PKM
+    public sealed class SecretBase3PKM
     {
         public uint PID { get; set; }
         public int Move1 { get; set; }

PKHeX.Core/Saves/Substructures/Gen3/SecretBase3Team.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class SecretBase3Team
+    public sealed class SecretBase3Team
     {
         private const int O_PID = 0;
         private const int O_Moves = 0x18;

PKHeX.Core/Saves/Substructures/Gen3/ShadowInfo.cs

@@ -4,7 +4,7 @@
 
 namespace PKHeX.Core
 {
-    public class ShadowInfoTableXD
+    public sealed class ShadowInfoTableXD
     {
         private readonly List<ShadowInfoEntryXD> Entries;
         private readonly int MaxLength;
@@ -56,7 +56,7 @@ public void SetEntry(ShadowInfoEntryXD Entry)
         public int Count => Entries.Count;
     }
 
-    public class ShadowInfoEntryXD
+    public sealed class ShadowInfoEntryXD
     {
         public readonly byte[] Data;
         internal const int SIZE_ENTRY = 72;
@@ -74,7 +74,7 @@ public class ShadowInfoEntryXD
         public bool IsEmpty => Species == 0;
     }
 
-    public class ShadowInfoEntryColo
+    public sealed class ShadowInfoEntryColo
     {
         public readonly byte[] Data;
         private const int SIZE_ENTRY = 12;

PKHeX.Core/Saves/Substructures/Gen3/StrategyMemo.cs

@@ -4,7 +4,7 @@
 
 namespace PKHeX.Core
 {
-    public class StrategyMemo
+    public sealed class StrategyMemo
     {
         private readonly bool XD;
         private const int SIZE_ENTRY = 12;
@@ -51,7 +51,7 @@ public void SetEntry(StrategyMemoEntry entry)
                 Entries.Add(entry);
         }
 
-        public class StrategyMemoEntry
+        public sealed class StrategyMemoEntry
         {
             public readonly byte[] Data;
             private readonly bool XD;

PKHeX.Core/Saves/Substructures/Gen4/HoneyTree.cs

@@ -5,7 +5,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Honey Tree in Sinnoh (Gen4)
     /// </summary>
-    public class HoneyTree
+    public sealed class HoneyTree
     {
         public const int Size = 8;
 

PKHeX.Core/Saves/Substructures/Gen4/Poffin4.cs

@@ -3,7 +3,7 @@
 
 namespace PKHeX.Core
 {
-    public class Poffin4
+    public sealed class Poffin4
     {
         public const int SIZE = 8;
         public readonly byte[] Data;

PKHeX.Core/Saves/Substructures/Gen4/PoffinCase4.cs

@@ -6,7 +6,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Storage for all <see cref="Poffin4"/> the trainer has.
     /// </summary>
-    public class PoffinCase4
+    public sealed class PoffinCase4
     {
         private readonly SAV4Sinnoh SAV;
         private readonly int Offset;

PKHeX.Core/Saves/Substructures/Gen5/BattleSubway5.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class BattleSubway5 : SaveBlock
+    public sealed class BattleSubway5 : SaveBlock
     {
         public BattleSubway5(SAV5 sav, int offset) : base(sav) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen5/CGearBackground.cs

@@ -4,7 +4,10 @@
 
 namespace PKHeX.Core
 {
-    public class CGearBackground
+    /// <summary>
+    /// Generation 5 C-Gear Background Image
+    /// </summary>
+    public sealed class CGearBackground
     {
         public const string Extension = "cgb";
         public const string Filter = "C-Gear Background|*.cgb";

PKHeX.Core/Saves/Substructures/Gen5/Daycare5.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class Daycare5 : SaveBlock
+    public sealed class Daycare5 : SaveBlock
     {
         // struct daycareSlot 
         // bool32 occupied

PKHeX.Core/Saves/Substructures/Gen5/EntreeForest.cs

@@ -2,7 +2,10 @@
 
 namespace PKHeX.Core
 {
-    public class EntreeForest
+    /// <summary>
+    /// Generation 5 Entree Forest
+    /// </summary>
+    public sealed class EntreeForest
     {
         /// <summary>
         /// Areas 1 thru 8 have 20 slots.

PKHeX.Core/Saves/Substructures/Gen5/EntreeSlot.cs

@@ -2,7 +2,10 @@
 
 namespace PKHeX.Core
 {
-    public class EntreeSlot
+    /// <summary>
+    /// Generation 5 <see cref="EntreeForest"/> slot
+    /// </summary>
+    public sealed class EntreeSlot
     {
         /// <summary>
         /// <see cref="PKM.Species"/> index

PKHeX.Core/Saves/Substructures/Gen5/MysteryBlock5.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class MysteryBlock5 : SaveBlock
+    public sealed class MysteryBlock5 : SaveBlock
     {
         private const int FlagStart = 0;
         private const int MaxReceivedFlag = 2048;

PKHeX.Core/Saves/Substructures/Gen5/PWTBlock5.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class PWTBlock5 : SaveBlock
+    public sealed class PWTBlock5 : SaveBlock
     {
         public PWTBlock5(SAV5B2W2 sav, int offset) : base(sav) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen5/PlayerData5.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class PlayerData5 : SaveBlock
+    public sealed class PlayerData5 : SaveBlock
     {
         public PlayerData5(SAV5 sav, int offset) : base(sav) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen6/BoxLayout6.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class BoxLayout6 : SaveBlock
+    public sealed class BoxLayout6 : SaveBlock
     {
         // gfstr5[31] boxNames;
         // byte[31] wallpapers;

PKHeX.Core/Saves/Substructures/Gen6/MysteryBlock6.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class MysteryBlock6 : SaveBlock
+    public sealed class MysteryBlock6 : SaveBlock
     {
         private const int FlagStart = 0;
         private const int MaxReceivedFlag = 2048;

PKHeX.Core/Saves/Substructures/Gen6/Puff6.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class Puff6 : SaveBlock
+    public sealed class Puff6 : SaveBlock
     {
         private const int MaxPuffID = 26; // Supreme Winter Poké Puff
         private const int PuffSlots = 100;
@@ -58,7 +58,7 @@ public void Sort(bool reverse = false)
     }
 
 
-    public class BattleBox6 : SaveBlock
+    public sealed class BattleBox6 : SaveBlock
     {
         public BattleBox6(SaveFile SAV, int offset) : base(SAV) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen6/Record6.cs

@@ -4,7 +4,7 @@
 
 namespace PKHeX.Core
 {
-    public class Record6 : RecordBlock
+    public sealed class Record6 : RecordBlock
     {
         public const int RecordCount = 200;
         protected override IReadOnlyList<byte> RecordMax { get; }

PKHeX.Core/Saves/Substructures/Gen6/SangoInfoBlock.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class SangoInfoBlock : SaveBlock
+    public sealed class SangoInfoBlock : SaveBlock
     {
         public SangoInfoBlock(SaveFile SAV, int offset) : base(SAV) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen6/Situation6.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class Situation6 : SaveBlock
+    public sealed class Situation6 : SaveBlock
     {
         public Situation6(SaveFile SAV, int offset) : base(SAV) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen6/TrainerFashion6.cs

@@ -69,7 +69,7 @@ public enum F6Skin
         }
     }
 
-    public class Fashion6Male : TrainerFashion6
+    public sealed class Fashion6Male : TrainerFashion6
     {
         public Fashion6Male(byte[] data, int offset)
             : base(data, offset) { }
@@ -269,7 +269,7 @@ public enum F6HairStyleFront
         }
     }
 
-    public class Fashion6Female : TrainerFashion6
+    public sealed class Fashion6Female : TrainerFashion6
     {
         public Fashion6Female(byte[] data, int offset)
             : base(data, offset) { }

PKHeX.Core/Saves/Substructures/Gen7/BattleTree7.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class BattleTree7 : SaveBlock
+    public sealed class BattleTree7 : SaveBlock
     {
         public BattleTree7(SAV7 sav, int offset) : base(sav) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen7/Daycare7.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class Daycare7 : SaveBlock
+    public sealed class Daycare7 : SaveBlock
     {
         public const int DaycareSeedSize = 32; // 128 bits
 

PKHeX.Core/Saves/Substructures/Gen7/FieldMoveModelSave7.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class FieldMoveModelSave7 : SaveBlock
+    public sealed class FieldMoveModelSave7 : SaveBlock
     {
         public FieldMoveModelSave7(SAV7 sav, int offset) : base(sav) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen7/GP1.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Go Park Entity transferred from <see cref="GameVersion.GO"/> to <see cref="GameVersion.GG"/>.
     /// </summary>
-    public class GP1
+    public sealed class GP1
     {
         public const int SIZE = 0x1B0;
         public byte[] Data { get; }

PKHeX.Core/Saves/Substructures/Gen7/MyStatus7.cs

@@ -3,7 +3,7 @@
 
 namespace PKHeX.Core
 {
-    public class MyStatus7 : SaveBlock
+    public sealed class MyStatus7 : SaveBlock
     {
         public const int GameSyncIDSize = 16; // 64 bits
         public const int NexUniqueIDSize = 32; // 128 bits

PKHeX.Core/Saves/Substructures/Gen7/PokeFinder7.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class PokeFinder7 : SaveBlock
+    public sealed class PokeFinder7 : SaveBlock
     {
         public PokeFinder7(SAV7 sav, int offset) : base(sav) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen7/WB7Records.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class WB7Records : SaveBlock
+    public sealed class WB7Records : SaveBlock
     {
         public WB7Records(SaveFile sav) : base(sav)
         {

PKHeX.Core/Saves/Substructures/Gen7/WormholeInfoReader.cs

@@ -1,6 +1,6 @@
 namespace PKHeX.Core
 {
-    public class WormholeInfoReader
+    public sealed class WormholeInfoReader
     {
         public readonly SAV7 SAV;
         public WormholeInfoReader(SAV7 sav) => SAV = sav;

PKHeX.Core/Saves/Substructures/Gen8/FieldMoveModelSave8.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class FieldMoveModelSave8 : SaveBlock
+    public sealed class FieldMoveModelSave8 : SaveBlock
     {
         public FieldMoveModelSave8(SAV8 sav, int offset) : base(sav) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen8/MyStatus8.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class MyStatus8 : SaveBlock
+    public sealed class MyStatus8 : SaveBlock
     {
         public MyStatus8(SAV8 sav, int offset) : base(sav) => Offset = offset;
 

PKHeX.Core/Saves/Substructures/Gen8/Record6.cs

@@ -4,7 +4,7 @@
 
 namespace PKHeX.Core
 {
-    public class Record8 : RecordBlock
+    public sealed class Record8 : RecordBlock
     {
         public const int RecordCount = 200;
         protected override IReadOnlyList<byte> RecordMax { get; }

PKHeX.Core/Saves/Substructures/Inventory/BeanPouch.cs

@@ -7,7 +7,7 @@ namespace PKHeX.Core
     /// <summary>
     /// Reads the bean pouch data from a <see cref="SAV7"/>.
     /// </summary>
-    public class BeanPouch
+    public sealed class BeanPouch
     {
         public const int Count = 15;
         public static readonly string[] BeanIndexNames = GetBeanList();

PKHeX.Core/Saves/Substructures/Inventory/InventoryItem.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class InventoryItem
+    public sealed class InventoryItem
     {
         public bool New;
         public bool FreeSpace;

PKHeX.Core/Saves/Substructures/Mail/Mail2.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class Mail2 : Mail
+    public sealed class Mail2 : Mail
     {
         private readonly bool US;
 

PKHeX.Core/Saves/Substructures/Mail/Mail3.cs

@@ -3,7 +3,7 @@
 
 namespace PKHeX.Core
 {
-    public class Mail3 : Mail
+    public sealed class Mail3 : Mail
     {
         private const int SIZE = 0x24;
         private readonly bool JP;

PKHeX.Core/Saves/Substructures/Mail/Mail4.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class Mail4 : Mail
+    public sealed class Mail4 : Mail
     {
         private const int SIZE = 0x38;
 

PKHeX.Core/Saves/Substructures/Mail/Mail5.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class Mail5 : Mail
+    public sealed class Mail5 : Mail
     {
         private const int SIZE = 0x38;
 

PKHeX.Core/Saves/Substructures/Misc/FestaFacility.cs

@@ -1,9 +1,8 @@
 using System;
-using System.Linq;
 
 namespace PKHeX.Core
 {
-    public class FestaFacility
+    public sealed class FestaFacility
     {
         private const int SIZE = 0x48;
         private readonly byte[] Data;

PKHeX.Core/Saves/Substructures/MysteryGiftAlbum.cs

@@ -3,7 +3,7 @@
     /// <summary>
     /// Structure containing the Mystery Gift Data
     /// </summary>
-    public class MysteryGiftAlbum
+    public sealed class MysteryGiftAlbum
     {
         /// <summary>
         /// Mystery Gift data received

PKHeX.Core/Saves/Substructures/OPower/OPower6.cs

@@ -3,7 +3,7 @@
 
 namespace PKHeX.Core
 {
-    public class OPower6 : SaveBlock
+    public sealed class OPower6 : SaveBlock
     {
         private static readonly OPowerFlagSet[] Mapping =
         {

PKHeX.Core/Saves/Substructures/PokeDex/Zukan5.cs

@@ -2,7 +2,7 @@
 
 namespace PKHeX.Core
 {
-    public class Zukan5 : Zukan
+    public sealed class Zukan5 : Zukan
     {
         protected override int OFS_SEEN => OFS_CAUGHT + BitSeenSize;
         protected override int OFS_CAUGHT => 0x8;

PKHeX.Core/Saves/Substructures/PokeDex/Zukan6.cs

@@ -168,7 +168,7 @@ private bool[] GetBlankLanguageBits(bool value)
         }
     }
 
-    public class Zukan6AO : Zukan6
+    public sealed class Zukan6AO : Zukan6
     {
         public Zukan6AO(SaveFile sav, int dex, int langflag) : base(sav, dex, langflag)
         {
@@ -197,7 +197,7 @@ public void SetEncounterCount(int index, ushort value)
         }
     }
 
-    public class Zukan6XY : Zukan6
+    public sealed class Zukan6XY : Zukan6
     {
         public Zukan6XY(SaveFile sav, int dex, int langflag) : base(sav, dex, langflag)
         {