diff --git a/PKHeX.Core/Editing/Database/TrainerDatabase.cs b/PKHeX.Core/Editing/Database/TrainerDatabase.cs
index 0f2a6e995..eb4c10f69 100644
--- a/PKHeX.Core/Editing/Database/TrainerDatabase.cs
+++ b/PKHeX.Core/Editing/Database/TrainerDatabase.cs
@@ -46,6 +46,9 @@ private static T GetRandomChoice<T>(IReadOnlyList<T> list)
     private ITrainerInfo? GetTrainerFromGroup(GameVersion version, LanguageID? lang = null)
     {
         var possible = Database.Where(z => version.Contains(z.Key)).ToList();
+        if (possible.Count == 0)
+            return null;
+
         if (lang != null)
         {
             possible = possible.Select(z =>
@@ -66,6 +69,9 @@ private static T GetRandomChoice<T>(IReadOnlyList<T> list)
     public ITrainerInfo? GetTrainerFromGen(byte generation, LanguageID? lang = null)
     {
         var possible = Database.Where(z => z.Key.GetGeneration() == generation).ToList();
+        if (possible.Count == 0)
+            return null;
+
         if (lang != null)
         {
             possible = possible.Select(z =>
diff --git a/PKHeX.Core/Legality/Encounters/Templates/Gen3/Colo/EncounterShadow3Colo.cs b/PKHeX.Core/Legality/Encounters/Templates/Gen3/Colo/EncounterShadow3Colo.cs
index 0c4909fc9..f9e699395 100644
--- a/PKHeX.Core/Legality/Encounters/Templates/Gen3/Colo/EncounterShadow3Colo.cs
+++ b/PKHeX.Core/Legality/Encounters/Templates/Gen3/Colo/EncounterShadow3Colo.cs
@@ -139,10 +139,6 @@ private void SetPINGA_EReader(CK3 pk)
                 break;
         }
         while (++ctr <= max);
-
-#if DEBUG
-        System.Diagnostics.Debug.Assert(ctr < max);
-#endif
     }
 
     #endregion
diff --git a/PKHeX.Core/Legality/Encounters/Templates/Gen4/EncounterArea4.cs b/PKHeX.Core/Legality/Encounters/Templates/Gen4/EncounterArea4.cs
index 0687784d8..5a0ae1703 100644
--- a/PKHeX.Core/Legality/Encounters/Templates/Gen4/EncounterArea4.cs
+++ b/PKHeX.Core/Legality/Encounters/Templates/Gen4/EncounterArea4.cs
@@ -34,7 +34,7 @@ private EncounterArea4(ReadOnlySpan<byte> data, [ConstantExpected] GameVersion g
         Type = (SlotType4)data[2];
         Rate = data[3];
         Version = game;
-        // although GroundTilePermission flags are 32bit, none have values > 16bit.
+        // although flags are 32bit, none have values > 16bit.
         GroundTile = (GroundTileAllowed)ReadUInt16LittleEndian(data[4..]);
 
         Slots = ReadRegularSlots(data[6..]);
diff --git a/PKHeX.Core/Legality/RNG/PIDIV.cs b/PKHeX.Core/Legality/RNG/PIDIV.cs
index cb71236b7..00b309a7b 100644
--- a/PKHeX.Core/Legality/RNG/PIDIV.cs
+++ b/PKHeX.Core/Legality/RNG/PIDIV.cs
@@ -50,7 +50,6 @@ public PIDIV(PIDType type, ulong seed)
 #if DEBUG
     public override string ToString() => NoSeed ? Type.ToString() : $"{Type} - 0x{OriginSeed:X8}";
 #endif
-    public bool IsClassicMethod() => Type.IsClassicMethod();
 
     public bool IsSeed64() => Type is PIDType.Xoroshiro;
 
diff --git a/PKHeX.Core/MysteryGifts/PCD.cs b/PKHeX.Core/MysteryGifts/PCD.cs
index 14df6efeb..cd81a2240 100644
--- a/PKHeX.Core/MysteryGifts/PCD.cs
+++ b/PKHeX.Core/MysteryGifts/PCD.cs
@@ -107,23 +107,11 @@ public override string CardTitle
     public bool GiftEquals(PGT pgt)
     {
         // Skip over the PGT's "Corresponding PCD Slot" @ 0x02
-        byte[] g = pgt.Data;
-        byte[] c = Gift.Data;
+        ReadOnlySpan<byte> g = pgt.Data;
+        ReadOnlySpan<byte> c = Gift.Data;
         if (g.Length != c.Length || g.Length < 3)
             return false;
-        for (int i = 0; i < 2; i++)
-        {
-            if (g[i] != c[i])
-                return false;
-        }
-
-        for (int i = 3; i < g.Length; i++)
-        {
-            if (g[i] != c[i])
-                return false;
-        }
-
-        return true;
+        return g[..2].SequenceEqual(c[..2]) && g[3..].SequenceEqual(c[3..]);
     }
 
     public override PK4 ConvertToPKM(ITrainerInfo tr, EncounterCriteria criteria)
diff --git a/PKHeX.Core/PKM/PK9.cs b/PKHeX.Core/PKM/PK9.cs
index 7c7bd002d..bec61a291 100644
--- a/PKHeX.Core/PKM/PK9.cs
+++ b/PKHeX.Core/PKM/PK9.cs
@@ -11,12 +11,7 @@ public sealed class PK9 : PKM, ISanityChecksum, ITeraType, ITechRecord, IObedien
 {
     public override ReadOnlySpan<ushort> ExtraBytes =>
     [
-        0x17,
-        0x1A, 0x1B,
-        0x23,
-        0x33,
-        0x3E, 0x3F,
-        0x90, 0x91, 0x92, 0x93, // Status condition
+        0x17, 0x1A, 0x1B, 0x23, 0x33, 0x3E, 0x3F,
         0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
         0xC5,
         0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
diff --git a/PKHeX.Core/Saves/Substructures/Misc/SlotGroup.cs b/PKHeX.Core/Saves/Substructures/Misc/SlotGroup.cs
index 21f606db8..8fc4a85a0 100644
--- a/PKHeX.Core/Saves/Substructures/Misc/SlotGroup.cs
+++ b/PKHeX.Core/Saves/Substructures/Misc/SlotGroup.cs
@@ -1,8 +1,3 @@
-namespace PKHeX.Core;
+namespace PKHeX.Core;
 
-public sealed record SlotGroup(string GroupName, PKM[] Slots)
-{
-#if DEBUG
-    public override string ToString() => $"{GroupName}: {Slots.Length} {Slots.GetType().Name}";
-#endif
-}
+public sealed record SlotGroup(string GroupName, PKM[] Slots);
diff --git a/PKHeX.Core/Saves/Substructures/PokeDex/Zukan8.cs b/PKHeX.Core/Saves/Substructures/PokeDex/Zukan8.cs
index eaae5e101..c4046bf53 100644
--- a/PKHeX.Core/Saves/Substructures/PokeDex/Zukan8.cs
+++ b/PKHeX.Core/Saves/Substructures/PokeDex/Zukan8.cs
@@ -130,20 +130,6 @@ public static List<Zukan8EntryInfo> GetRawIndexes(PersonalTable8SWSH pt, int dex
         _ => lang - 1,
     };
 
-#if DEBUG
-    public IList<string> GetEntryNames(IReadOnlyList<string> speciesNames)
-    {
-        var dex = new List<string>();
-        foreach (var (species, entry) in DexLookup)
-        {
-            var name = entry.GetEntryName(speciesNames, species);
-            dex.Add(name);
-        }
-        dex.Sort();
-        return dex;
-    }
-#endif
-
     #region Structure
 
     internal const int EntrySize = 0x30;
@@ -718,30 +704,6 @@ private int GetSavedIndex()
     private const int Rigel1Count = 211; // Count within Armor dex
     private const int Rigel2Count = 210; // Count within Crown dex
     public const int TotalCount = GalarCount + Rigel1Count + Rigel2Count;
-#if DEBUG
-    /// <summary>
-    /// Gets the <see cref="Zukan8Index"/> from the absolute (overall) dex index. Don't use this method unless you're analyzing things.
-    /// </summary>
-    /// <param name="index">Unique Pokédex index (incremental). Should be 0-indexed.</param>
-    public static Zukan8Index GetFromAbsoluteIndex(ushort index)
-    {
-        if (index > TotalCount)
-            return new Zukan8Index();
-
-        if (index < GalarCount)
-            return new Zukan8Index(Zukan8Type.Galar, ++index);
-        index -= GalarCount;
-
-        if (index < Rigel1Count)
-            return new Zukan8Index(Zukan8Type.Armor, ++index);
-        index -= Rigel1Count;
-
-        if (index < Rigel2Count)
-            return new Zukan8Index(Zukan8Type.Crown, ++index);
-
-        throw new ArgumentOutOfRangeException(nameof(index));
-    }
-#endif
 
     public string DexPrefix => DexType.GetZukanTypeInternalPrefix();