diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot.cs
index 1475b778e..5551f72d4 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot.cs
@@ -9,21 +9,28 @@ namespace PKHeX.Core
     /// <remarks>Wild encounter slots are found as random encounters in-game.</remarks>
     public abstract record EncounterSlot : IEncounterable, ILocation
     {
-        public int Species { get; protected init; }
-        public int Form { get; protected init; }
-        public int LevelMin { get; protected init; }
-        public int LevelMax { get; protected init; }
+        public int Species { get; }
+        public int Form { get; }
+        public int LevelMin { get; }
+        public int LevelMax { get; }
         public abstract int Generation { get; }
         public bool EggEncounter => false;
         public override string ToString() => $"{(Species) Species} @ {LevelMin}-{LevelMax}";
 
+        protected EncounterSlot(EncounterArea area, int species, int form, int min, int max)
+        {
+            Area = area;
+            Species = species;
+            Form = form;
+            LevelMin = min;
+            LevelMax = max;
+        }
+
         internal readonly EncounterArea Area;
         public GameVersion Version => Area.Version;
         public int Location => Area.Location;
         public int EggLocation => 0;
 
-        protected EncounterSlot(EncounterArea area) => Area = area;
-
         public bool FixedLevel => LevelMin == LevelMax;
 
         private protected const string wild = "Wild Encounter";
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot1.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot1.cs
index 9940d82ac..c7029dd3d 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot1.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot1.cs
@@ -9,11 +9,8 @@ public sealed record EncounterSlot1 : EncounterSlot, INumberedSlot
         public override int Generation => 1;
         public int SlotNumber { get; }
 
-        public EncounterSlot1(EncounterArea1 area, int species, int min, int max, int slot) : base(area)
+        public EncounterSlot1(EncounterArea1 area, int species, int min, int max, int slot) : base(area, species, 0, min, max)
         {
-            Species = species;
-            LevelMin = min;
-            LevelMax = max;
             SlotNumber = slot;
         }
 
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot2.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot2.cs
index bbdae6464..ae1523078 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot2.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot2.cs
@@ -12,11 +12,8 @@ public sealed record EncounterSlot2 : EncounterSlot, INumberedSlot
         public override int Generation => 2;
         public int SlotNumber { get; }
 
-        public EncounterSlot2(EncounterArea2 area, int species, int min, int max, int slot) : base(area)
+        public EncounterSlot2(EncounterArea2 area, int species, int min, int max, int slot) : base(area, species, 0, min, max)
         {
-            Species = species;
-            LevelMin = min;
-            LevelMax = max;
             SlotNumber = slot;
         }
 
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot3.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot3.cs
index 0cf0e947a..502fe6a91 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot3.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot3.cs
@@ -15,12 +15,8 @@ public record EncounterSlot3 : EncounterSlot, IMagnetStatic, INumberedSlot
 
         public int SlotNumber { get; }
 
-        public EncounterSlot3(EncounterArea3 area, int species, int form, int min, int max, int slot, int mpi, int mpc, int sti, int stc) : base(area)
+        public EncounterSlot3(EncounterArea3 area, int species, int form, int min, int max, int slot, int mpi, int mpc, int sti, int stc) : base(area, species, form, min, max)
         {
-            Species = species;
-            Form = form;
-            LevelMin = min;
-            LevelMax = max;
             SlotNumber = slot;
 
             MagnetPullIndex = mpi;
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot3PokeSpot.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot3PokeSpot.cs
index 8192801f9..7b44b4a88 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot3PokeSpot.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot3PokeSpot.cs
@@ -10,11 +10,8 @@ public sealed record EncounterSlot3PokeSpot : EncounterSlot, INumberedSlot
 
         public int SlotNumber { get; }
 
-        public EncounterSlot3PokeSpot(EncounterArea3XD area, int species, int min, int max, int slot) : base(area)
+        public EncounterSlot3PokeSpot(EncounterArea3XD area, int species, int min, int max, int slot) : base(area, species, 0, min, max)
         {
-            Species = species;
-            LevelMin = min;
-            LevelMax = max;
             SlotNumber = slot;
         }
 
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot4.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot4.cs
index e293e11d2..6735a1eb4 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot4.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot4.cs
@@ -16,12 +16,8 @@ public sealed record EncounterSlot4 : EncounterSlot, IMagnetStatic, INumberedSlo
 
         public int SlotNumber { get; }
 
-        public EncounterSlot4(EncounterArea4 area, int species, int form, int min, int max, int slot, int mpi, int mpc, int sti, int stc) : base(area)
+        public EncounterSlot4(EncounterArea4 area, int species, int form, int min, int max, int slot, int mpi, int mpc, int sti, int stc) : base(area, species, form, min, max)
         {
-            Species = species;
-            Form = form;
-            LevelMin = min;
-            LevelMax = max;
             SlotNumber = slot;
 
             MagnetPullIndex = mpi;
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot5.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot5.cs
index 1c3409b3a..677bc8944 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot5.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot5.cs
@@ -8,12 +8,8 @@ public sealed record EncounterSlot5 : EncounterSlot
     {
         public override int Generation => 5;
 
-        public EncounterSlot5(EncounterArea5 area, int species, int form, int min, int max) : base(area)
+        public EncounterSlot5(EncounterArea5 area, int species, int form, int min, int max) : base(area, species, form, min, max)
         {
-            Species = species;
-            Form = form;
-            LevelMin = min;
-            LevelMax = max;
         }
     }
 }
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot6AO.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot6AO.cs
index a59ec3a44..f802dd5c1 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot6AO.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot6AO.cs
@@ -14,12 +14,8 @@ public sealed record EncounterSlot6AO : EncounterSlot
         public bool WhiteFlute { get; init; }
         public bool BlackFlute { get; init; }
 
-        public EncounterSlot6AO(EncounterArea6AO area, int species, int form, int min, int max) : base(area)
+        public EncounterSlot6AO(EncounterArea6AO area, int species, int form, int min, int max) : base(area, species, form, min, max)
         {
-            Species = species;
-            Form = form;
-            LevelMin = min;
-            LevelMax = max;
         }
 
         protected override void SetFormatSpecificData(PKM pk)
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot6XY.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot6XY.cs
index fad00b026..c6e60e554 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot6XY.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot6XY.cs
@@ -9,12 +9,8 @@ public sealed record EncounterSlot6XY : EncounterSlot
         public override int Generation => 6;
         public bool Pressure { get; init; }
 
-        public EncounterSlot6XY(EncounterArea6XY area, int species, int form, int min, int max) : base(area)
+        public EncounterSlot6XY(EncounterArea6XY area, int species, int form, int min, int max) : base(area, species, form, min, max)
         {
-            Species = species;
-            Form = form;
-            LevelMin = min;
-            LevelMax = max;
         }
 
         protected override void SetFormatSpecificData(PKM pk)
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot7.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot7.cs
index b084740c3..103373e5c 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot7.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot7.cs
@@ -8,12 +8,8 @@ public sealed record EncounterSlot7 : EncounterSlot
     {
         public override int Generation => 7;
 
-        public EncounterSlot7(EncounterArea7 area, int species, int form, int min, int max) : base(area)
+        public EncounterSlot7(EncounterArea7 area, int species, int form, int min, int max) : base(area, species, form, min, max)
         {
-            Species = species;
-            Form = form;
-            LevelMin = min;
-            LevelMax = max;
         }
     }
 }
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot7b.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot7b.cs
index 4fc6aca1e..ba45864a8 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot7b.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot7b.cs
@@ -8,11 +8,8 @@ public sealed record EncounterSlot7b : EncounterSlot
     {
         public override int Generation => 7;
 
-        public EncounterSlot7b(EncounterArea7b area, int species, int min, int max) : base(area)
+        public EncounterSlot7b(EncounterArea7b area, int species, int min, int max) : base(area, species, 0, min, max)
         {
-            Species = species;
-            LevelMin = min;
-            LevelMax = max;
         }
     }
 }
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot8.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot8.cs
index 867ae198e..951ee64b3 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot8.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/EncounterSlot8.cs
@@ -10,13 +10,8 @@ public sealed record EncounterSlot8 : EncounterSlot
         public override string LongName => Weather == AreaWeather8.All ? wild : $"{wild} - {Weather.ToString().Replace("_", string.Empty)}";
         public override int Generation => 8;
 
-        public EncounterSlot8(EncounterArea8 area, int specForm, int min, int max, AreaWeather8 weather) : base(area)
+        public EncounterSlot8(EncounterArea8 area, int species, int form, int min, int max, AreaWeather8 weather) : base(area, species, form, min, max)
         {
-            Species = specForm & 0x7FF;
-            Form = specForm >> 11;
-            LevelMin = min;
-            LevelMax = max;
-
             Weather = weather;
         }
     }
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlot7GO.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlot7GO.cs
index 637677cfa..5b6543e3d 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlot7GO.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlot7GO.cs
@@ -9,10 +9,8 @@ public sealed record EncounterSlot7GO : EncounterSlotGO
         public override int Generation => 7;
 
         public EncounterSlot7GO(EncounterArea7g area, int species, int form, int start, int end, Shiny shiny, PogoType type)
-            : base(area, start, end, shiny, type)
+            : base(area, species, form, start, end, shiny, type)
         {
-            Species = species;
-            Form = form;
         }
 
         protected override void ApplyDetails(ITrainerInfo sav, EncounterCriteria criteria, PKM pk)
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlot8GO.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlot8GO.cs
index cf54a4910..ffb09db00 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlot8GO.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlot8GO.cs
@@ -18,11 +18,8 @@ public sealed record EncounterSlot8GO : EncounterSlotGO
         public GameVersion OriginGroup { get; }
 
         public EncounterSlot8GO(EncounterArea8g area, int species, int form, int start, int end, Shiny shiny, PogoType type, GameVersion originGroup)
-            : base(area, start, end, shiny, type)
+            : base(area, species, form, start, end, shiny, type)
         {
-            Species = species;
-            Form = form;
-
             OriginGroup = originGroup;
         }
 
diff --git a/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlotGO.cs b/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlotGO.cs
index 94457f7a7..0a4120b3c 100644
--- a/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlotGO.cs
+++ b/PKHeX.Core/Legality/Encounters/EncounterSlot/GO/EncounterSlotGO.cs
@@ -19,11 +19,8 @@ public abstract record EncounterSlotGO : EncounterSlot, IPogoSlot
         /// <inheritdoc/>
         public PogoType Type { get; }
 
-        protected EncounterSlotGO(EncounterArea area, int start, int end, Shiny shiny, PogoType type) : base(area)
+        protected EncounterSlotGO(EncounterArea area, int species, int form, int start, int end, Shiny shiny, PogoType type) : base(area, species, form, type.GetMinLevel(), EncountersGO.MAX_LEVEL)
         {
-            LevelMin = type.GetMinLevel();
-            LevelMax = EncountersGO.MAX_LEVEL;
-
             Start = start;
             End = end;