diff --git a/.github/README-de.md b/.github/README-de.md
index 8aacab7c4..106da18d2 100644
--- a/.github/README-de.md
+++ b/.github/README-de.md
@@ -7,7 +7,7 @@ Save Editor für die Pokémon Hauptreihe, geschrieben in [C#](https://de.wikiped
 Die folgenden Dateien werden unterstützt:
 * Spielstände ("main", \*.sav, \*.dsv, \*.dat, \*.gci, \*.bin)
 * GameCube Memory Card Daten (\*.raw, \*.bin), die GC Pokémon Spielstände enthalten.
-* Einzelne Pokémon (.pk\*, \*.ck3, \*.xk3, \*.pb7, \*.sk2, \*.bk4)
+* Einzelne Pokémon (.pk\*, \*.ck3, \*.xk3, \*.pb7, \*.sk2, \*.bk4, \*.rk4)
 * Wunderkarten (\*.pgt, \*.pcd, \*.pgf, .wc\*), inklusive Konvertierung zu .pk\*
 * Import von GO Park Pokémon (\*.gp1) inklusive Konvertierung zu .pb7
 * Import von Teams aus entschlüsselten 3DS Battle Videos.
diff --git a/.github/README-es.md b/.github/README-es.md
index c7e391580..fd3f228bb 100644
--- a/.github/README-es.md
+++ b/.github/README-es.md
@@ -7,7 +7,7 @@ Editor de guardado de las series principales de Pokémon, programado en [C#](htt
 Soporta los siguientes archivos:
 * Archivos de guardado ("main", \*.sav, \*.dsv, \*.dat, \*.gci, \*.bin)
 * Archivos de Memory Card de GameCube (\*.raw, \*.bin) que contienen archivos de GC Pokémon.
-* Archivos de entidades individuales de Pokémon (.pk\*, \*.ck3, \*.xk3, \*.pb7, \*.sk2, \*.bk4)
+* Archivos de entidades individuales de Pokémon (.pk\*, \*.ck3, \*.xk3, \*.pb7, \*.sk2, \*.bk4, \*.rk4)
 * Archivos de Regalos Misteriosos (\*.pgt, \*.pcd, \*.pgf, .wc\*) incluyendo conversión a .pk\*
 * Importar archivos de entidades de GO Park (\*.gp1) incluyendo conversión a .pb7
 * Importar equipos desde archivos Decrypted 3DS Battle Videos
diff --git a/.github/README-fr.md b/.github/README-fr.md
index ff6dc3bd0..92b6a85a4 100644
--- a/.github/README-fr.md
+++ b/.github/README-fr.md
@@ -7,7 +7,7 @@ PKHeX
 Prend en charge les fichiers suivants :
 * Enregistrer les fichiers ("main", \*.sav, \*.dsv, \*.dat, \*.gci, \*.bin)
 * Fichiers de carte mémoire GameCube (\*.raw, \*.bin) contenant des sauvegardes de Pokémon GC.
-* Fichiers d'entités Pokémon individuels (.pk\*, \*.ck3, \*.xk3, \*.pb7, \*.sk2, \*.bk4)
+* Fichiers d'entités Pokémon individuels (.pk\*, \*.ck3, \*.xk3, \*.pb7, \*.sk2, \*.bk4, \*.rk4)
 * Fichiers de cadeau mystère (\*.pgt, \*.pcd, \*.pgf, .wc\*) y compris la conversion en .pk\*
 * Importation d'entités GO Park (\*.gp1) incluant la conversion en .pb7
 * Importation d'équipes à partir de 3DS Battle Videos
diff --git a/.github/README-it.md b/.github/README-it.md
index 4579fcab5..a7b74e708 100644
--- a/.github/README-it.md
+++ b/.github/README-it.md
@@ -7,7 +7,7 @@ Editor di Salvataggi Pokémon per la serie principale, programmato in [C#](https
 Supporta i seguenti file:
 * File di salvataggio ("main", \*.sav, \*.dsv, \*.dat, \*.gci, \*.bin)
 * File di Memory Card GameCube (\*.raw, \*.bin) contenenti File di Salvataggio Pokémon.
-* File di Entità Pokémon individuali (.pk\*, \*.ck3, \*.xk3, \*.pb7, \*.sk2, \*.bk4)
+* File di Entità Pokémon individuali (.pk\*, \*.ck3, \*.xk3, \*.pb7, \*.sk2, \*.bk4, \*.rk4)
 * File di Dono Segreto (\*.pgt, \*.pcd, \*.pgf, .wc\*) inclusa conversione in .pk\*
 * Importazione di Entità del Go Park (\*.gp1) inclusa conversione in .pb7
 * Importazione di squadre da Video Lotta del 3DS decriptati
diff --git a/PKHeX.Core/Editing/Bulk/BatchEditing.cs b/PKHeX.Core/Editing/Bulk/BatchEditing.cs
index 1c66dc890..a3d4c15ae 100644
--- a/PKHeX.Core/Editing/Bulk/BatchEditing.cs
+++ b/PKHeX.Core/Editing/Bulk/BatchEditing.cs
@@ -19,7 +19,7 @@ public static class BatchEditing
     {
         typeof (PK8), typeof (PA8), typeof (PB8),
         typeof (PB7),
-        typeof (PK7), typeof (PK6), typeof (PK5), typeof (PK4), typeof(BK4),
+        typeof (PK7), typeof (PK6), typeof (PK5), typeof (PK4), typeof(BK4), typeof(RK4),
         typeof (PK3), typeof (XK3), typeof (CK3),
         typeof (PK2), typeof (SK2), typeof (PK1),
     };
diff --git a/PKHeX.Core/PKM/PK4.cs b/PKHeX.Core/PKM/PK4.cs
index 658e3d0d7..3de71547a 100644
--- a/PKHeX.Core/PKM/PK4.cs
+++ b/PKHeX.Core/PKM/PK4.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using static System.Buffers.Binary.BinaryPrimitives;
 
 namespace PKHeX.Core;
@@ -288,15 +289,24 @@ public sealed class PK4 : G4PKM
     {
         BK4 bk4 = ConvertTo<BK4>();
 
-        // Enforce DP content only (no PtHGSS)
-        if (Form != 0 && !PersonalTable.DP[Species].HasForms && Species != 201)
-            bk4.Form = 0;
-        if (HeldItem > Legal.MaxItemID_4_DP)
-            bk4.HeldItem = 0;
+        StripPtHGSSContent(bk4);
         bk4.RefreshChecksum();
         return bk4;
     }
 
+    public RK4 ConvertToRK4()
+    {
+        byte[] data = Data.AsSpan(0, PokeCrypto.SIZE_4RSTORED).ToArray();
+        for (int i = PokeCrypto.SIZE_4STORED; i < PokeCrypto.SIZE_4RSTORED; i++)
+            data[i] = 0;
+
+        RK4 rk4 = new RK4(data);
+        rk4.OwnershipType = RanchOwnershipType.Hayley;
+
+        rk4.RefreshChecksum();
+        return rk4;
+    }
+
     public PK5 ConvertToPK5()
     {
         // Double Check Location Data to see if we're already a PK5
diff --git a/PKHeX.Core/PKM/RK4.cs b/PKHeX.Core/PKM/RK4.cs
new file mode 100644
index 000000000..c174f8dc2
--- /dev/null
+++ b/PKHeX.Core/PKM/RK4.cs
@@ -0,0 +1,345 @@
+using System;
+using System.Collections.Generic;
+using static System.Buffers.Binary.BinaryPrimitives;
+
+namespace PKHeX.Core;
+
+/// <summary> Generation 4 <see cref="PKM"/> format for My Pokémon Ranch. </summary>
+/// <remarks>
+/// MPR-specific values are stored in Big Endian format rather than Little Endian. Beware.
+/// </remarks>
+public sealed class RK4 : G4PKM
+{
+    private static readonly ushort[] Unused =
+{
+        0x42, 0x43, 0x5E, 0x63, 0x64, 0x65, 0x66, 0x67, 0x87,
+    };
+
+    public override IReadOnlyList<ushort> ExtraBytes => Unused;
+
+    public override int SIZE_PARTY => PokeCrypto.SIZE_4RSTORED;
+    public override int SIZE_STORED => PokeCrypto.SIZE_4RSTORED;
+    public override EntityContext Context => EntityContext.Gen4;
+    public override PersonalInfo PersonalInfo => PersonalTable.Pt.GetFormEntry(Species, Form);
+
+    public RK4() : base(PokeCrypto.SIZE_4RSTORED) { }
+    public RK4(byte[] data) : base(Decrypt(data)) { }
+
+    private static byte[] Decrypt(byte[] data)
+    {
+        byte[] pkData = data.Slice(0, PokeCrypto.SIZE_4STORED);
+        PokeCrypto.DecryptIfEncrypted45(ref pkData);
+        return data;
+    }
+
+    public override PKM Clone() => new RK4((byte[])Data.Clone());
+
+    // Structure
+    public override uint PID { get => ReadUInt32LittleEndian(Data.AsSpan(0x00)); set => WriteUInt32LittleEndian(Data.AsSpan(0x00), value); }
+    public override ushort Sanity { get => ReadUInt16LittleEndian(Data.AsSpan(0x04)); set => WriteUInt16LittleEndian(Data.AsSpan(0x04), value); }
+    public override ushort Checksum { get => ReadUInt16LittleEndian(Data.AsSpan(0x06)); set => WriteUInt16LittleEndian(Data.AsSpan(0x06), value); }
+
+    #region Block A
+    public override ushort Species { get => ReadUInt16LittleEndian(Data.AsSpan(0x08)); set => WriteUInt16LittleEndian(Data.AsSpan(0x08), value); }
+    public override int HeldItem { get => ReadUInt16LittleEndian(Data.AsSpan(0x0A)); set => WriteUInt16LittleEndian(Data.AsSpan(0x0A), (ushort)value); }
+    public override int TID { get => ReadUInt16LittleEndian(Data.AsSpan(0x0C)); set => WriteUInt16LittleEndian(Data.AsSpan(0x0C), (ushort)value); }
+    public override int SID { get => ReadUInt16LittleEndian(Data.AsSpan(0x0E)); set => WriteUInt16LittleEndian(Data.AsSpan(0x0E), (ushort)value); }
+    public override uint EXP { get => ReadUInt32LittleEndian(Data.AsSpan(0x10)); set => WriteUInt32LittleEndian(Data.AsSpan(0x10), value); }
+    public override int OT_Friendship { get => Data[0x14]; set => Data[0x14] = (byte)value; }
+    public override int Ability { get => Data[0x15]; set => Data[0x15] = (byte)value; }
+    public override int MarkValue { get => Data[0x16]; set => Data[0x16] = (byte)value; }
+    public override int Language { get => Data[0x17]; set => Data[0x17] = (byte)value; }
+    public override int EV_HP { get => Data[0x18]; set => Data[0x18] = (byte)value; }
+    public override int EV_ATK { get => Data[0x19]; set => Data[0x19] = (byte)value; }
+    public override int EV_DEF { get => Data[0x1A]; set => Data[0x1A] = (byte)value; }
+    public override int EV_SPE { get => Data[0x1B]; set => Data[0x1B] = (byte)value; }
+    public override int EV_SPA { get => Data[0x1C]; set => Data[0x1C] = (byte)value; }
+    public override int EV_SPD { get => Data[0x1D]; set => Data[0x1D] = (byte)value; }
+    public override byte CNT_Cool { get => Data[0x1E]; set => Data[0x1E] = value; }
+    public override byte CNT_Beauty { get => Data[0x1F]; set => Data[0x1F] = value; }
+    public override byte CNT_Cute { get => Data[0x20]; set => Data[0x20] = value; }
+    public override byte CNT_Smart { get => Data[0x21]; set => Data[0x21] = value; }
+    public override byte CNT_Tough { get => Data[0x22]; set => Data[0x22] = value; }
+    public override byte CNT_Sheen { get => Data[0x23]; set => Data[0x23] = value; }
+
+    private byte RIB0 { get => Data[0x24]; set => Data[0x24] = value; } // Sinnoh 1
+    private byte RIB1 { get => Data[0x25]; set => Data[0x25] = value; } // Sinnoh 2
+    private byte RIB2 { get => Data[0x26]; set => Data[0x26] = value; } // Unova 1
+    private byte RIB3 { get => Data[0x27]; set => Data[0x27] = value; } // Unova 2
+    public override bool RibbonChampionSinnoh { get => (RIB0 & (1 << 0)) == 1 << 0; set => RIB0 = (byte)((RIB0 & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonAbility { get => (RIB0 & (1 << 1)) == 1 << 1; set => RIB0 = (byte)((RIB0 & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonAbilityGreat { get => (RIB0 & (1 << 2)) == 1 << 2; set => RIB0 = (byte)((RIB0 & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonAbilityDouble { get => (RIB0 & (1 << 3)) == 1 << 3; set => RIB0 = (byte)((RIB0 & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RibbonAbilityMulti { get => (RIB0 & (1 << 4)) == 1 << 4; set => RIB0 = (byte)((RIB0 & ~(1 << 4)) | (value ? 1 << 4 : 0)); }
+    public override bool RibbonAbilityPair { get => (RIB0 & (1 << 5)) == 1 << 5; set => RIB0 = (byte)((RIB0 & ~(1 << 5)) | (value ? 1 << 5 : 0)); }
+    public override bool RibbonAbilityWorld { get => (RIB0 & (1 << 6)) == 1 << 6; set => RIB0 = (byte)((RIB0 & ~(1 << 6)) | (value ? 1 << 6 : 0)); }
+    public override bool RibbonAlert { get => (RIB0 & (1 << 7)) == 1 << 7; set => RIB0 = (byte)((RIB0 & ~(1 << 7)) | (value ? 1 << 7 : 0)); }
+    public override bool RibbonShock { get => (RIB1 & (1 << 0)) == 1 << 0; set => RIB1 = (byte)((RIB1 & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonDowncast { get => (RIB1 & (1 << 1)) == 1 << 1; set => RIB1 = (byte)((RIB1 & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonCareless { get => (RIB1 & (1 << 2)) == 1 << 2; set => RIB1 = (byte)((RIB1 & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonRelax { get => (RIB1 & (1 << 3)) == 1 << 3; set => RIB1 = (byte)((RIB1 & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RibbonSnooze { get => (RIB1 & (1 << 4)) == 1 << 4; set => RIB1 = (byte)((RIB1 & ~(1 << 4)) | (value ? 1 << 4 : 0)); }
+    public override bool RibbonSmile { get => (RIB1 & (1 << 5)) == 1 << 5; set => RIB1 = (byte)((RIB1 & ~(1 << 5)) | (value ? 1 << 5 : 0)); }
+    public override bool RibbonGorgeous { get => (RIB1 & (1 << 6)) == 1 << 6; set => RIB1 = (byte)((RIB1 & ~(1 << 6)) | (value ? 1 << 6 : 0)); }
+    public override bool RibbonRoyal { get => (RIB1 & (1 << 7)) == 1 << 7; set => RIB1 = (byte)((RIB1 & ~(1 << 7)) | (value ? 1 << 7 : 0)); }
+    public override bool RibbonGorgeousRoyal { get => (RIB2 & (1 << 0)) == 1 << 0; set => RIB2 = (byte)((RIB2 & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonFootprint { get => (RIB2 & (1 << 1)) == 1 << 1; set => RIB2 = (byte)((RIB2 & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonRecord { get => (RIB2 & (1 << 2)) == 1 << 2; set => RIB2 = (byte)((RIB2 & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonEvent { get => (RIB2 & (1 << 3)) == 1 << 3; set => RIB2 = (byte)((RIB2 & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RibbonLegend { get => (RIB2 & (1 << 4)) == 1 << 4; set => RIB2 = (byte)((RIB2 & ~(1 << 4)) | (value ? 1 << 4 : 0)); }
+    public override bool RibbonChampionWorld { get => (RIB2 & (1 << 5)) == 1 << 5; set => RIB2 = (byte)((RIB2 & ~(1 << 5)) | (value ? 1 << 5 : 0)); }
+    public override bool RibbonBirthday { get => (RIB2 & (1 << 6)) == 1 << 6; set => RIB2 = (byte)((RIB2 & ~(1 << 6)) | (value ? 1 << 6 : 0)); }
+    public override bool RibbonSpecial { get => (RIB2 & (1 << 7)) == 1 << 7; set => RIB2 = (byte)((RIB2 & ~(1 << 7)) | (value ? 1 << 7 : 0)); }
+    public override bool RibbonSouvenir { get => (RIB3 & (1 << 0)) == 1 << 0; set => RIB3 = (byte)((RIB3 & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonWishing { get => (RIB3 & (1 << 1)) == 1 << 1; set => RIB3 = (byte)((RIB3 & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonClassic { get => (RIB3 & (1 << 2)) == 1 << 2; set => RIB3 = (byte)((RIB3 & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonPremier { get => (RIB3 & (1 << 3)) == 1 << 3; set => RIB3 = (byte)((RIB3 & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RIB3_4 { get => (RIB3 & (1 << 4)) == 1 << 4; set => RIB3 = (byte)((RIB3 & ~(1 << 4)) | (value ? 1 << 4 : 0)); } // Unused
+    public override bool RIB3_5 { get => (RIB3 & (1 << 5)) == 1 << 5; set => RIB3 = (byte)((RIB3 & ~(1 << 5)) | (value ? 1 << 5 : 0)); } // Unused
+    public override bool RIB3_6 { get => (RIB3 & (1 << 6)) == 1 << 6; set => RIB3 = (byte)((RIB3 & ~(1 << 6)) | (value ? 1 << 6 : 0)); } // Unused
+    public override bool RIB3_7 { get => (RIB3 & (1 << 7)) == 1 << 7; set => RIB3 = (byte)((RIB3 & ~(1 << 7)) | (value ? 1 << 7 : 0)); } // Unused
+    #endregion
+
+    #region Block B
+    public override ushort Move1 { get => ReadUInt16LittleEndian(Data.AsSpan(0x28)); set => WriteUInt16LittleEndian(Data.AsSpan(0x28), value); }
+    public override ushort Move2 { get => ReadUInt16LittleEndian(Data.AsSpan(0x2A)); set => WriteUInt16LittleEndian(Data.AsSpan(0x2A), value); }
+    public override ushort Move3 { get => ReadUInt16LittleEndian(Data.AsSpan(0x2C)); set => WriteUInt16LittleEndian(Data.AsSpan(0x2C), value); }
+    public override ushort Move4 { get => ReadUInt16LittleEndian(Data.AsSpan(0x2E)); set => WriteUInt16LittleEndian(Data.AsSpan(0x2E), value); }
+    public override int Move1_PP { get => Data[0x30]; set => Data[0x30] = (byte)value; }
+    public override int Move2_PP { get => Data[0x31]; set => Data[0x31] = (byte)value; }
+    public override int Move3_PP { get => Data[0x32]; set => Data[0x32] = (byte)value; }
+    public override int Move4_PP { get => Data[0x33]; set => Data[0x33] = (byte)value; }
+    public override int Move1_PPUps { get => Data[0x34]; set => Data[0x34] = (byte)value; }
+    public override int Move2_PPUps { get => Data[0x35]; set => Data[0x35] = (byte)value; }
+    public override int Move3_PPUps { get => Data[0x36]; set => Data[0x36] = (byte)value; }
+    public override int Move4_PPUps { get => Data[0x37]; set => Data[0x37] = (byte)value; }
+    public uint IV32 { get => ReadUInt32LittleEndian(Data.AsSpan(0x38)); set => WriteUInt32LittleEndian(Data.AsSpan(0x38), value); }
+    public override int IV_HP { get => (int)(IV32 >> 00) & 0x1F; set => IV32 = (IV32 & ~(0x1Fu << 00)) | ((value > 31 ? 31u : (uint)value) << 00); }
+    public override int IV_ATK { get => (int)(IV32 >> 05) & 0x1F; set => IV32 = (IV32 & ~(0x1Fu << 05)) | ((value > 31 ? 31u : (uint)value) << 05); }
+    public override int IV_DEF { get => (int)(IV32 >> 10) & 0x1F; set => IV32 = (IV32 & ~(0x1Fu << 10)) | ((value > 31 ? 31u : (uint)value) << 10); }
+    public override int IV_SPE { get => (int)(IV32 >> 15) & 0x1F; set => IV32 = (IV32 & ~(0x1Fu << 15)) | ((value > 31 ? 31u : (uint)value) << 15); }
+    public override int IV_SPA { get => (int)(IV32 >> 20) & 0x1F; set => IV32 = (IV32 & ~(0x1Fu << 20)) | ((value > 31 ? 31u : (uint)value) << 20); }
+    public override int IV_SPD { get => (int)(IV32 >> 25) & 0x1F; set => IV32 = (IV32 & ~(0x1Fu << 25)) | ((value > 31 ? 31u : (uint)value) << 25); }
+    public override bool IsEgg { get => ((IV32 >> 30) & 1) == 1; set => IV32 = (IV32 & ~0x40000000u) | (value ? 0x40000000u : 0u); }
+    public override bool IsNicknamed { get => ((IV32 >> 31) & 1) == 1; set => IV32 = (IV32 & 0x7FFFFFFFu) | (value ? 0x80000000u : 0u); }
+
+    private byte RIB4 { get => Data[0x3C]; set => Data[0x3C] = value; } // Hoenn 1a
+    private byte RIB5 { get => Data[0x3D]; set => Data[0x3D] = value; } // Hoenn 1b
+    private byte RIB6 { get => Data[0x3E]; set => Data[0x3E] = value; } // Hoenn 2a
+    private byte RIB7 { get => Data[0x3F]; set => Data[0x3F] = value; } // Hoenn 2b
+    public override bool RibbonG3Cool { get => (RIB4 & (1 << 0)) == 1 << 0; set => RIB4 = (byte)((RIB4 & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonG3CoolSuper { get => (RIB4 & (1 << 1)) == 1 << 1; set => RIB4 = (byte)((RIB4 & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonG3CoolHyper { get => (RIB4 & (1 << 2)) == 1 << 2; set => RIB4 = (byte)((RIB4 & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonG3CoolMaster { get => (RIB4 & (1 << 3)) == 1 << 3; set => RIB4 = (byte)((RIB4 & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RibbonG3Beauty { get => (RIB4 & (1 << 4)) == 1 << 4; set => RIB4 = (byte)((RIB4 & ~(1 << 4)) | (value ? 1 << 4 : 0)); }
+    public override bool RibbonG3BeautySuper { get => (RIB4 & (1 << 5)) == 1 << 5; set => RIB4 = (byte)((RIB4 & ~(1 << 5)) | (value ? 1 << 5 : 0)); }
+    public override bool RibbonG3BeautyHyper { get => (RIB4 & (1 << 6)) == 1 << 6; set => RIB4 = (byte)((RIB4 & ~(1 << 6)) | (value ? 1 << 6 : 0)); }
+    public override bool RibbonG3BeautyMaster { get => (RIB4 & (1 << 7)) == 1 << 7; set => RIB4 = (byte)((RIB4 & ~(1 << 7)) | (value ? 1 << 7 : 0)); }
+    public override bool RibbonG3Cute { get => (RIB5 & (1 << 0)) == 1 << 0; set => RIB5 = (byte)((RIB5 & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonG3CuteSuper { get => (RIB5 & (1 << 1)) == 1 << 1; set => RIB5 = (byte)((RIB5 & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonG3CuteHyper { get => (RIB5 & (1 << 2)) == 1 << 2; set => RIB5 = (byte)((RIB5 & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonG3CuteMaster { get => (RIB5 & (1 << 3)) == 1 << 3; set => RIB5 = (byte)((RIB5 & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RibbonG3Smart { get => (RIB5 & (1 << 4)) == 1 << 4; set => RIB5 = (byte)((RIB5 & ~(1 << 4)) | (value ? 1 << 4 : 0)); }
+    public override bool RibbonG3SmartSuper { get => (RIB5 & (1 << 5)) == 1 << 5; set => RIB5 = (byte)((RIB5 & ~(1 << 5)) | (value ? 1 << 5 : 0)); }
+    public override bool RibbonG3SmartHyper { get => (RIB5 & (1 << 6)) == 1 << 6; set => RIB5 = (byte)((RIB5 & ~(1 << 6)) | (value ? 1 << 6 : 0)); }
+    public override bool RibbonG3SmartMaster { get => (RIB5 & (1 << 7)) == 1 << 7; set => RIB5 = (byte)((RIB5 & ~(1 << 7)) | (value ? 1 << 7 : 0)); }
+    public override bool RibbonG3Tough { get => (RIB6 & (1 << 0)) == 1 << 0; set => RIB6 = (byte)((RIB6 & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonG3ToughSuper { get => (RIB6 & (1 << 1)) == 1 << 1; set => RIB6 = (byte)((RIB6 & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonG3ToughHyper { get => (RIB6 & (1 << 2)) == 1 << 2; set => RIB6 = (byte)((RIB6 & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonG3ToughMaster { get => (RIB6 & (1 << 3)) == 1 << 3; set => RIB6 = (byte)((RIB6 & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RibbonChampionG3 { get => (RIB6 & (1 << 4)) == 1 << 4; set => RIB6 = (byte)((RIB6 & ~(1 << 4)) | (value ? 1 << 4 : 0)); }
+    public override bool RibbonWinning { get => (RIB6 & (1 << 5)) == 1 << 5; set => RIB6 = (byte)((RIB6 & ~(1 << 5)) | (value ? 1 << 5 : 0)); }
+    public override bool RibbonVictory { get => (RIB6 & (1 << 6)) == 1 << 6; set => RIB6 = (byte)((RIB6 & ~(1 << 6)) | (value ? 1 << 6 : 0)); }
+    public override bool RibbonArtist { get => (RIB6 & (1 << 7)) == 1 << 7; set => RIB6 = (byte)((RIB6 & ~(1 << 7)) | (value ? 1 << 7 : 0)); }
+    public override bool RibbonEffort { get => (RIB7 & (1 << 0)) == 1 << 0; set => RIB7 = (byte)((RIB7 & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonChampionBattle { get => (RIB7 & (1 << 1)) == 1 << 1; set => RIB7 = (byte)((RIB7 & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonChampionRegional { get => (RIB7 & (1 << 2)) == 1 << 2; set => RIB7 = (byte)((RIB7 & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonChampionNational { get => (RIB7 & (1 << 3)) == 1 << 3; set => RIB7 = (byte)((RIB7 & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RibbonCountry { get => (RIB7 & (1 << 4)) == 1 << 4; set => RIB7 = (byte)((RIB7 & ~(1 << 4)) | (value ? 1 << 4 : 0)); }
+    public override bool RibbonNational { get => (RIB7 & (1 << 5)) == 1 << 5; set => RIB7 = (byte)((RIB7 & ~(1 << 5)) | (value ? 1 << 5 : 0)); }
+    public override bool RibbonEarth { get => (RIB7 & (1 << 6)) == 1 << 6; set => RIB7 = (byte)((RIB7 & ~(1 << 6)) | (value ? 1 << 6 : 0)); }
+    public override bool RibbonWorld { get => (RIB7 & (1 << 7)) == 1 << 7; set => RIB7 = (byte)((RIB7 & ~(1 << 7)) | (value ? 1 << 7 : 0)); }
+
+    public override bool FatefulEncounter { get => (Data[0x40] & 1) == 1; set => Data[0x40] = (byte)((Data[0x40] & ~0x01) | (value ? 1 : 0)); }
+    public override int Gender { get => (Data[0x40] >> 1) & 0x3; set => Data[0x40] = (byte)((Data[0x40] & ~0x06) | (value << 1)); }
+    public override byte Form { get => (byte)(Data[0x40] >> 3); set => Data[0x40] = (byte)((Data[0x40] & 0x07) | (value << 3)); }
+    public override int ShinyLeaf { get => Data[0x41]; set => Data[0x41] = (byte)value; }
+    // 0x42-0x43 Unused
+    public override ushort Egg_LocationExtended
+    {
+        get => ReadUInt16LittleEndian(Data.AsSpan(0x44));
+        set => WriteUInt16LittleEndian(Data.AsSpan(0x44), value);
+    }
+
+    public override ushort Met_LocationExtended
+    {
+        get => ReadUInt16LittleEndian(Data.AsSpan(0x46));
+        set => WriteUInt16LittleEndian(Data.AsSpan(0x46), value);
+    }
+
+    #endregion
+
+    #region Block C
+    public override string Nickname
+    {
+        get => StringConverter4.GetString(Nickname_Trash);
+        set => StringConverter4.SetString(Nickname_Trash, value.AsSpan(), 10, StringConverterOption.None);
+    }
+
+    // 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
+    private byte RIB9 { get => Data[0x61]; set => Data[0x61] = value; } // Sinnoh 4
+    private byte RIBA { get => Data[0x62]; set => Data[0x62] = value; } // Sinnoh 5
+    private byte RIBB { get => Data[0x63]; set => Data[0x63] = value; } // Sinnoh 6
+    public override bool RibbonG4Cool { get => (RIB8 & (1 << 0)) == 1 << 0; set => RIB8 = (byte)((RIB8 & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonG4CoolGreat { get => (RIB8 & (1 << 1)) == 1 << 1; set => RIB8 = (byte)((RIB8 & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonG4CoolUltra { get => (RIB8 & (1 << 2)) == 1 << 2; set => RIB8 = (byte)((RIB8 & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonG4CoolMaster { get => (RIB8 & (1 << 3)) == 1 << 3; set => RIB8 = (byte)((RIB8 & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RibbonG4Beauty { get => (RIB8 & (1 << 4)) == 1 << 4; set => RIB8 = (byte)((RIB8 & ~(1 << 4)) | (value ? 1 << 4 : 0)); }
+    public override bool RibbonG4BeautyGreat { get => (RIB8 & (1 << 5)) == 1 << 5; set => RIB8 = (byte)((RIB8 & ~(1 << 5)) | (value ? 1 << 5 : 0)); }
+    public override bool RibbonG4BeautyUltra { get => (RIB8 & (1 << 6)) == 1 << 6; set => RIB8 = (byte)((RIB8 & ~(1 << 6)) | (value ? 1 << 6 : 0)); }
+    public override bool RibbonG4BeautyMaster { get => (RIB8 & (1 << 7)) == 1 << 7; set => RIB8 = (byte)((RIB8 & ~(1 << 7)) | (value ? 1 << 7 : 0)); }
+    public override bool RibbonG4Cute { get => (RIB9 & (1 << 0)) == 1 << 0; set => RIB9 = (byte)((RIB9 & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonG4CuteGreat { get => (RIB9 & (1 << 1)) == 1 << 1; set => RIB9 = (byte)((RIB9 & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonG4CuteUltra { get => (RIB9 & (1 << 2)) == 1 << 2; set => RIB9 = (byte)((RIB9 & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonG4CuteMaster { get => (RIB9 & (1 << 3)) == 1 << 3; set => RIB9 = (byte)((RIB9 & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RibbonG4Smart { get => (RIB9 & (1 << 4)) == 1 << 4; set => RIB9 = (byte)((RIB9 & ~(1 << 4)) | (value ? 1 << 4 : 0)); }
+    public override bool RibbonG4SmartGreat { get => (RIB9 & (1 << 5)) == 1 << 5; set => RIB9 = (byte)((RIB9 & ~(1 << 5)) | (value ? 1 << 5 : 0)); }
+    public override bool RibbonG4SmartUltra { get => (RIB9 & (1 << 6)) == 1 << 6; set => RIB9 = (byte)((RIB9 & ~(1 << 6)) | (value ? 1 << 6 : 0)); }
+    public override bool RibbonG4SmartMaster { get => (RIB9 & (1 << 7)) == 1 << 7; set => RIB9 = (byte)((RIB9 & ~(1 << 7)) | (value ? 1 << 7 : 0)); }
+    public override bool RibbonG4Tough { get => (RIBA & (1 << 0)) == 1 << 0; set => RIBA = (byte)((RIBA & ~(1 << 0)) | (value ? 1 << 0 : 0)); }
+    public override bool RibbonG4ToughGreat { get => (RIBA & (1 << 1)) == 1 << 1; set => RIBA = (byte)((RIBA & ~(1 << 1)) | (value ? 1 << 1 : 0)); }
+    public override bool RibbonG4ToughUltra { get => (RIBA & (1 << 2)) == 1 << 2; set => RIBA = (byte)((RIBA & ~(1 << 2)) | (value ? 1 << 2 : 0)); }
+    public override bool RibbonG4ToughMaster { get => (RIBA & (1 << 3)) == 1 << 3; set => RIBA = (byte)((RIBA & ~(1 << 3)) | (value ? 1 << 3 : 0)); }
+    public override bool RIBA_4 { get => (RIBA & (1 << 4)) == 1 << 4; set => RIBA = (byte)((RIBA & ~(1 << 4)) | (value ? 1 << 4 : 0)); } // Unused
+    public override bool RIBA_5 { get => (RIBA & (1 << 5)) == 1 << 5; set => RIBA = (byte)((RIBA & ~(1 << 5)) | (value ? 1 << 5 : 0)); } // Unused
+    public override bool RIBA_6 { get => (RIBA & (1 << 6)) == 1 << 6; set => RIBA = (byte)((RIBA & ~(1 << 6)) | (value ? 1 << 6 : 0)); } // Unused
+    public override bool RIBA_7 { get => (RIBA & (1 << 7)) == 1 << 7; set => RIBA = (byte)((RIBA & ~(1 << 7)) | (value ? 1 << 7 : 0)); } // Unused
+    public override bool RIBB_0 { get => (RIBB & (1 << 0)) == 1 << 0; set => RIBB = (byte)((RIBB & ~(1 << 0)) | (value ? 1 << 0 : 0)); } // Unused
+    public override bool RIBB_1 { get => (RIBB & (1 << 1)) == 1 << 1; set => RIBB = (byte)((RIBB & ~(1 << 1)) | (value ? 1 << 1 : 0)); } // Unused
+    public override bool RIBB_2 { get => (RIBB & (1 << 2)) == 1 << 2; set => RIBB = (byte)((RIBB & ~(1 << 2)) | (value ? 1 << 2 : 0)); } // Unused
+    public override bool RIBB_3 { get => (RIBB & (1 << 3)) == 1 << 3; set => RIBB = (byte)((RIBB & ~(1 << 3)) | (value ? 1 << 3 : 0)); } // Unused
+    public override bool RIBB_4 { get => (RIBB & (1 << 4)) == 1 << 4; set => RIBB = (byte)((RIBB & ~(1 << 4)) | (value ? 1 << 4 : 0)); } // Unused
+    public override bool RIBB_5 { get => (RIBB & (1 << 5)) == 1 << 5; set => RIBB = (byte)((RIBB & ~(1 << 5)) | (value ? 1 << 5 : 0)); } // Unused
+    public override bool RIBB_6 { get => (RIBB & (1 << 6)) == 1 << 6; set => RIBB = (byte)((RIBB & ~(1 << 6)) | (value ? 1 << 6 : 0)); } // Unused
+    public override bool RIBB_7 { get => (RIBB & (1 << 7)) == 1 << 7; set => RIBB = (byte)((RIBB & ~(1 << 7)) | (value ? 1 << 7 : 0)); } // Unused
+    // 0x64-0x67 Unused
+    #endregion
+
+    #region Block D
+    public override string OT_Name
+    {
+        get => StringConverter4.GetString(OT_Trash);
+        set => StringConverter4.SetString(OT_Trash, value.AsSpan(), 7, StringConverterOption.None);
+    }
+
+    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; }
+    public override int Met_Year { get => Data[0x7B]; set => Data[0x7B] = (byte)value; }
+    public override int Met_Month { get => Data[0x7C]; set => Data[0x7C] = (byte)value; }
+    public override int Met_Day { get => Data[0x7D]; set => Data[0x7D] = (byte)value; }
+
+    public override ushort Egg_LocationDP
+    {
+        get => ReadUInt16LittleEndian(Data.AsSpan(0x7E));
+        set => WriteUInt16LittleEndian(Data.AsSpan(0x7E), value);
+    }
+    public override ushort Met_LocationDP
+    {
+        get => ReadUInt16LittleEndian(Data.AsSpan(0x80));
+        set => WriteUInt16LittleEndian(Data.AsSpan(0x80), value);
+    }
+
+    private byte PKRS { get => Data[0x82]; set => Data[0x82] = value; }
+    public override int PKRS_Days { get => PKRS & 0xF; set => PKRS = (byte)((PKRS & ~0xF) | value); }
+    public override int PKRS_Strain { get => PKRS >> 4; set => PKRS = (byte)((PKRS & 0xF) | (value << 4)); }
+    public override byte BallDPPt { get => Data[0x83]; set => Data[0x83] = value; }
+    public override int Met_Level { get => Data[0x84] & ~0x80; set => Data[0x84] = (byte)((Data[0x84] & 0x80) | value); }
+    public override int OT_Gender { get => Data[0x84] >> 7; set => Data[0x84] = (byte)((Data[0x84] & ~0x80) | (value << 7)); }
+    public override GroundTileType GroundTile { get => (GroundTileType)Data[0x85]; set => Data[0x85] = (byte)value; }
+    public override byte BallHGSS { get => Data[0x86]; set => Data[0x86] = value; }
+    public override byte PokeathlonStat { get => Data[0x87]; set => Data[0x87] = value; }
+    #endregion
+
+    #region Battle Stats
+    public override int Status_Condition { get => 0; set { } }
+    public override int Stat_Level { get => CurrentLevel; set { } }
+    public override int Stat_HPCurrent { get => PersonalInfo.HP; set { } }
+    public override int Stat_HPMax { get => PersonalInfo.HP; set { } }
+    public override int Stat_ATK { get => PersonalInfo.ATK; set { } }
+    public override int Stat_DEF { get => PersonalInfo.DEF; set { } }
+    public override int Stat_SPE { get => PersonalInfo.SPE; set { } }
+    public override int Stat_SPA { get => PersonalInfo.SPA; set { } }
+    public override int Stat_SPD { get => PersonalInfo.SPD; set { } }
+
+    #endregion
+
+    #region My Pokémon Ranch Data
+
+    /* ====Metadata====
+     * uint8_t poke_type;// 01 trainer, 04 hayley, 05 traded
+     * unused alignment byte
+     * uint16_t tradeable;// 02 is tradeable, normal 00
+     * uint16_t tid;
+     * uint16_t sid;
+     * uint32_t name1;
+     * uint32_t name2;
+     * uint32_t name3;
+     * uint32_t name4;
+     */
+
+    // 4 bytes extra at the end of the metadata, unused/reserved; or, it's just extra for the Trainer Name.
+
+    public RanchOwnershipType OwnershipType
+    {
+        get => (RanchOwnershipType)Data[0x88];
+        set => Data[0x88] = (byte)value;
+    }
+
+    public RanchOwnershipStatus OwnershipStatus
+    {
+        get => (RanchOwnershipStatus)ReadUInt16BigEndian(Data.AsSpan(0x8A));
+        set => WriteUInt16BigEndian(Data.AsSpan(0x8A), (ushort)value);
+    }
+
+    public ushort HT_TID { get => ReadUInt16LittleEndian(Data.AsSpan(0x8C)); set => WriteUInt16LittleEndian(Data.AsSpan(0x8C), value); }
+    public ushort HT_SID { get => ReadUInt16LittleEndian(Data.AsSpan(0x8E)); set => WriteUInt16LittleEndian(Data.AsSpan(0x8E), value); }
+
+    public override Span<byte> HT_Trash => Data.AsSpan(0x90, 0x10);
+    public override string HT_Name
+    {
+        get => StringConverter4.GetString(HT_Trash);
+        set => StringConverter4.SetString(HT_Trash, value.AsSpan(), 7, StringConverterOption.None);
+    }
+
+    #endregion
+
+    // Methods
+    public void SetSaveRevision(int ranchSaveRevision)
+    {
+        if (ranchSaveRevision == 0)
+            StripPtHGSSContent(this);
+    }
+
+    protected override byte[] Encrypt()
+    {
+        RefreshChecksum();
+
+        byte[] data = (byte[])Data.Clone();
+        byte[] pkData = data.Slice(0, PokeCrypto.SIZE_4STORED);
+        pkData = PokeCrypto.EncryptArray45(pkData);
+        pkData.CopyTo(data, 0);
+        return data;
+    }
+
+    public PK4 ConvertToPK4()
+    {
+        byte[] data = Data.AsSpan(0, PokeCrypto.SIZE_4STORED).ToArray();
+        var pk4 = new PK4(data);
+        pk4.ResetPartyStats();
+        pk4.RefreshChecksum();
+        return pk4;
+    }
+}
diff --git a/PKHeX.Core/PKM/Shared/G4PKM.cs b/PKHeX.Core/PKM/Shared/G4PKM.cs
index dfd90f6d4..433f311d6 100644
--- a/PKHeX.Core/PKM/Shared/G4PKM.cs
+++ b/PKHeX.Core/PKM/Shared/G4PKM.cs
@@ -294,6 +294,15 @@ public abstract class G4PKM : PKM,
         return false;
     }
 
+    // Enforce DP content only (no PtHGSS)
+    protected void StripPtHGSSContent(PKM pk)
+    {
+        if (Form != 0 && !PersonalTable.DP[Species].HasForms && Species != 201)
+            pk.Form = 0;
+        if (HeldItem > Legal.MaxItemID_4_DP)
+            pk.HeldItem = 0;
+    }
+
     protected T ConvertTo<T>() where T : G4PKM, new()
     {
         var pk = new T
diff --git a/PKHeX.Core/PKM/Util/Conversion/EntityConverter.cs b/PKHeX.Core/PKM/Util/Conversion/EntityConverter.cs
index c7ddf2c5c..005b9e496 100644
--- a/PKHeX.Core/PKM/Util/Conversion/EntityConverter.cs
+++ b/PKHeX.Core/PKM/Util/Conversion/EntityConverter.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Diagnostics;
 using static PKHeX.Core.EntityConverterResult;
 
@@ -119,6 +119,7 @@ public static class EntityConverter
         PK3 pk3 when destType == typeof(CK3) => pk3.ConvertToCK3(),
         PK3 pk3 when destType == typeof(XK3) => pk3.ConvertToXK3(),
         PK4 pk4 when destType == typeof(BK4) => pk4.ConvertToBK4(),
+        PK4 pk4 when destType == typeof(RK4) => pk4.ConvertToRK4(),
 
         PB8 pb8 when destType == typeof(PK8) => pb8.ConvertToPK8(),
         PK8 pk8 when destType == typeof(PB8) => pk8.ConvertToPB8(),
@@ -141,6 +142,7 @@ public static class EntityConverter
         CK3 ck3 => ck3.ConvertToPK3(),
         XK3 xk3 => xk3.ConvertToPK3(),
         BK4 bk4 => bk4.ConvertToPK4(),
+        RK4 rk4 => rk4.ConvertToPK4(),
 
         _ => InvalidTransfer(out result, NoTransferRoute),
     };
diff --git a/PKHeX.Core/PKM/Util/EntityDetection.cs b/PKHeX.Core/PKM/Util/EntityDetection.cs
index df6996a3e..ed9f09227 100644
--- a/PKHeX.Core/PKM/Util/EntityDetection.cs
+++ b/PKHeX.Core/PKM/Util/EntityDetection.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using static System.Buffers.Binary.BinaryPrimitives;
 
@@ -12,7 +12,7 @@ public static class EntityDetection
         PokeCrypto.SIZE_2ULIST,   PokeCrypto.SIZE_2JLIST,   PokeCrypto.SIZE_2STADIUM,
         PokeCrypto.SIZE_3STORED,  PokeCrypto.SIZE_3PARTY,
         PokeCrypto.SIZE_3CSTORED, PokeCrypto.SIZE_3XSTORED,
-        PokeCrypto.SIZE_4STORED,  PokeCrypto.SIZE_4PARTY,
+        PokeCrypto.SIZE_4STORED,  PokeCrypto.SIZE_4PARTY,   PokeCrypto.SIZE_4RSTORED,
         PokeCrypto.SIZE_5PARTY,
         PokeCrypto.SIZE_6STORED,  PokeCrypto.SIZE_6PARTY,
         PokeCrypto.SIZE_8STORED,  PokeCrypto.SIZE_8PARTY,
@@ -29,6 +29,7 @@ public static class EntityDetection
     public static bool IsPresentGB(ReadOnlySpan<byte> data) => data[0] != 0; // Species non-zero
     public static bool IsPresentGC(ReadOnlySpan<byte> data) => ReadUInt16BigEndian(data) != 0; // Species non-zero
     public static bool IsPresentGBA(ReadOnlySpan<byte> data) => (data[0x13] & 0xFB) == 2; // ignore egg flag, must be FlagHasSpecies.
+    public static bool IsPresentSAV4Ranch(ReadOnlySpan<byte> data) => ReadUInt32LittleEndian(data) != 0 && ReadUInt32BigEndian(data) != 0x28; // Species non-zero, ignore file end marker
 
     public static bool IsPresent(ReadOnlySpan<byte> data)
     {
diff --git a/PKHeX.Core/PKM/Util/EntityFileExtension.cs b/PKHeX.Core/PKM/Util/EntityFileExtension.cs
index ec9329424..66f3586cc 100644
--- a/PKHeX.Core/PKM/Util/EntityFileExtension.cs
+++ b/PKHeX.Core/PKM/Util/EntityFileExtension.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 
 namespace PKHeX.Core;
@@ -30,7 +30,10 @@ public static class EntityFileExtension
             result.Add("xk3"); // xd
         }
         if (maxGeneration >= 4)
+        {
             result.Add("bk4"); // battle revolution
+            result.Add("rk4"); // My Pokemon Ranch
+        }
         if (maxGeneration >= 7)
             result.Add(ExtensionPB7); // let's go
         if (maxGeneration >= 8)
diff --git a/PKHeX.Core/PKM/Util/EntityFormat.cs b/PKHeX.Core/PKM/Util/EntityFormat.cs
index 4647782a8..0a12a7d8e 100644
--- a/PKHeX.Core/PKM/Util/EntityFormat.cs
+++ b/PKHeX.Core/PKM/Util/EntityFormat.cs
@@ -29,6 +29,7 @@ public static class EntityFormat
         SIZE_3CSTORED                 => FormatCK3,
         SIZE_3XSTORED                 => FormatXK3,
         SIZE_4PARTY or SIZE_4STORED   => GetFormat45(data),
+        SIZE_4RSTORED                 => FormatRK4,
         SIZE_5PARTY                   => FormatPK5,
         SIZE_6STORED                  => GetFormat67(data),
         SIZE_6PARTY                   => GetFormat67_PGT(data),
@@ -65,6 +66,8 @@ public static class EntityFormat
     // assumes decrypted state
     private static EntityFormatDetected GetFormat45(ReadOnlySpan<byte> data)
     {
+        if (data.Length == PokeCrypto.SIZE_4RSTORED)
+            return FormatRK4;
         if (ReadUInt16LittleEndian(data[0x4..]) != 0)
             return FormatBK4; // BK4 non-zero sanity
         if (data[0x5F] < 0x10 && ReadUInt16LittleEndian(data[0x80..]) < 0x3333)
@@ -114,6 +117,7 @@ public static class EntityFormat
         FormatXK3 => new XK3(data),
         FormatPK4 => new PK4(data),
         FormatBK4 => new BK4(data),
+        FormatRK4 => new RK4(data),
         FormatPK5 => new PK5(data),
         FormatPK6 => new PK6(data),
         FormatPK7 => new PK7(data),
@@ -202,7 +206,7 @@ public enum EntityFormatDetected
     FormatPK1,
     FormatPK2, FormatSK2,
     FormatPK3, FormatCK3, FormatXK3,
-    FormatPK4, FormatBK4, FormatPK5,
+    FormatPK4, FormatBK4, FormatRK4, FormatPK5,
     FormatPK6, FormatPK7, FormatPB7,
     FormatPK8, FormatPA8, FormatPB8,
 
diff --git a/PKHeX.Core/PKM/Util/PokeCrypto.cs b/PKHeX.Core/PKM/Util/PokeCrypto.cs
index de0c9f675..b97c60df6 100644
--- a/PKHeX.Core/PKM/Util/PokeCrypto.cs
+++ b/PKHeX.Core/PKM/Util/PokeCrypto.cs
@@ -31,6 +31,7 @@ public static class PokeCrypto
 
     internal const int SIZE_4PARTY = 236;
     internal const int SIZE_4STORED = 136;
+    internal const int SIZE_4RSTORED = 164; // 4STORED + 0x1C bytes of extra data
     private const int SIZE_4BLOCK = 32;
 
     internal const int SIZE_5PARTY = 220;
diff --git a/PKHeX.Core/Saves/SaveFile.cs b/PKHeX.Core/Saves/SaveFile.cs
index f56a35634..ec1abe1a1 100644
--- a/PKHeX.Core/Saves/SaveFile.cs
+++ b/PKHeX.Core/Saves/SaveFile.cs
@@ -534,7 +534,7 @@ public abstract class SaveFile : ITrainerInfo, IGameValueLimit, IBoxDetailWallpa
     public int NextOpenBoxSlot(int lastKnownOccupied = -1)
     {
         var storage = BoxBuffer.AsSpan();
-        int count = BoxSlotCount * BoxCount;
+        int count = SlotCount;
         for (int i = lastKnownOccupied + 1; i < count; i++)
         {
             int offset = GetBoxSlotOffset(i);
diff --git a/PKHeX.Core/Saves/Storage/SAV4Ranch.cs b/PKHeX.Core/Saves/Storage/SAV4Ranch.cs
index 26253a1f8..0df4110ef 100644
--- a/PKHeX.Core/Saves/Storage/SAV4Ranch.cs
+++ b/PKHeX.Core/Saves/Storage/SAV4Ranch.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Security.Cryptography;
 using static System.Buffers.Binary.BinaryPrimitives;
 
@@ -10,75 +11,145 @@ namespace PKHeX.Core;
 /// </summary>
 public sealed class SAV4Ranch : BulkStorage, ISaveFileRevision
 {
-    protected override int SIZE_STORED => 0x88 + 0x1C;
-    protected override int SIZE_PARTY => SIZE_STORED;
+    protected override int SIZE_STORED => PokeCrypto.SIZE_4RSTORED;
+    protected override int SIZE_PARTY => PokeCrypto.SIZE_4RSTORED;
 
     public int SaveRevision => Version == GameVersion.DP ? 0 : 1;
     public string SaveRevisionString => Version == GameVersion.DP ? "-DP" : "-Pt";
 
-    public override int BoxCount { get; }
-    public override int SlotCount { get; }
+    // ReSharper disable PrivateFieldCanBeConvertedToLocalVariable
+    private readonly int DataEndMarker;
+    private int DataEndMarkerOffset;
+    private readonly int MiiDataOffset;
+    private readonly int MiiCountOffset;
+    private readonly int TrainerMiiDataOffset;
+    private readonly int TrainerMiiCountOffset;
+    private readonly int PokemonCountOffset;
+
+    public override int SlotCount => RanchLevel.GetSlotCount(CurrentRanchLevelIndex);
+    public override int BoxCount => (int)Math.Ceiling((decimal)SlotCount / SlotsPerBox);
+    public int MiiCount { get; }
+    public int TrainerMiiCount { get; }
+    public int MaxToys => RanchLevel.GetMaxToys(CurrentRanchLevelIndex);
+    public int MaxMiiCount => RanchLevel.GetMaxMiis(CurrentRanchLevelIndex);
 
     public override IPersonalTable Personal => PersonalTable.Pt;
     public override IReadOnlyList<ushort> HeldItems => Legal.HeldItems_Pt;
     protected override SaveFile CloneInternal() => new SAV4Ranch((byte[])Data.Clone());
-    public override string PlayTimeString => $"{Checksums.CRC16Invert(Data):X4}";
     protected internal override string ShortSummary => $"{OT} {PlayTimeString}";
     public override string Extension => ".bin";
 
-    protected override PKM GetPKM(byte[] data) => new PK4(data);
-    protected override byte[] DecryptPKM(byte[] data) => PokeCrypto.DecryptArray45(data);
+    protected override PKM GetPKM(byte[] data) => new RK4(data);
     public override StorageSlotSource GetSlotFlags(int index) => index >= SlotCount ? StorageSlotSource.Locked : StorageSlotSource.None;
     protected override bool IsSlotSwapProtected(int box, int slot) => IsSlotOverwriteProtected(box, slot);
+    public override bool IsPKMPresent(ReadOnlySpan<byte> data) => EntityDetection.IsPresentSAV4Ranch(data);
 
-    public SAV4Ranch(byte[] data) : base(data, typeof(PK4), 0)
+    public SAV4Ranch(byte[] data) : base(data, typeof(RK4), 0)
     {
         Version = Data.Length == SaveUtil.SIZE_G4RANCH_PLAT ? GameVersion.Pt : GameVersion.DP;
 
         OT = GetString(0x770, 0x12);
 
-        // 0x18 starts the header table
-        // Block 00, Offset = ???
-        // Block 01, Offset = Mii Data
-        // Block 02, Offset = Mii Link Data
-        // Block 03, Offset = Pokemon Data
-        // Block 04, Offset = ??
+        // 0x18 starts the header table: [u32 BlockID, u32 Offset]
+        // Block 00, Offset = Metadata object
+        // Block 01, Offset = Mii Data Array object
+        // Block 02, Offset = Mii Link Data Array object
+        // Block 03, Offset = Pokemon Data Array object
+        // Block 04, Offset = reserved object
 
         // Unpack the binary a little:
-        // size, count, Mii data[count]
-        // size, count, Mii Link data[count]
-        // size, count, Pokemon (PK4 + metadata)[count]
-        // size, count, ???
+        // 00: size, ???
+        // 01: size, count, Mii data[count]
+        // 02: size, count, Mii Link data[count]
+        // 03: size, count, Pokemon (PK4 + metadata)[count]
+        // 04: size, count, ???
 
-        /* ====Metadata====
-         * uint8_t poke_type;// 01 trainer, 04 hayley, 05 traded
-         * uint8_t tradeable;// 02 is tradeable, normal 00
-         * uint16_t tid;
-         * uint16_t sid;
-         * uint32_t name1;
-         * uint32_t name2;
-         * uint32_t name3;
-         * uint32_t name4;
-         */
+        MiiCountOffset = ReadInt32BigEndian(Data.AsSpan(0x24)) + 4;
+        TrainerMiiCountOffset = ReadInt32BigEndian(Data.AsSpan(0x2C)) + 4;
+        MiiCount = ReadInt32BigEndian(Data.AsSpan(MiiCountOffset));
+        TrainerMiiCount = ReadInt32BigEndian(Data.AsSpan(TrainerMiiCountOffset));
 
-        var pkCountOffset = ReadInt32BigEndian(Data.AsSpan(0x34)) + 4;
-        SlotCount = ReadInt32BigEndian(Data.AsSpan(pkCountOffset));
-        BoxCount = (int)Math.Ceiling((decimal)SlotCount / SlotsPerBox);
+        MiiDataOffset = MiiCountOffset + 4;
+        TrainerMiiDataOffset = TrainerMiiCountOffset + 4;
 
-        Box = pkCountOffset + 4;
+        PokemonCountOffset = ReadInt32BigEndian(Data.AsSpan(0x34)) + 4;
+        Box = PokemonCountOffset + 4;
 
-        FinalCountOffset = ReadInt32BigEndian(Data.AsSpan(0x3C));
-        FinalCount = ReadInt32BigEndian(Data.AsSpan(FinalCountOffset));
+        DataEndMarkerOffset = ReadInt32BigEndian(Data.AsSpan(0x3C));
+        DataEndMarker = ReadInt32BigEndian(Data.AsSpan(DataEndMarkerOffset));
     }
 
-    private readonly int FinalCount;
-    private readonly int FinalCountOffset;
+    private const int ToyBaseOffset = 0x227B;
+
+    public byte CurrentRanchLevelIndex { get => Data[0x5A]; set => Data[0x5A] = value; }
+    public byte PlannedRanchLevelIndex { get => Data[0x5B]; set => Data[0x5B] = value; } // tomorrow's level
+
+    public uint SecondsSince2000 { get => ReadUInt32BigEndian(Data.AsSpan(0x5C)); set => WriteUInt32BigEndian(Data.AsSpan(0x5C), value); }
+    public uint TotalSeconds { get => ReadUInt32BigEndian(Data.AsSpan(0x60)); set => WriteUInt32BigEndian(Data.AsSpan(0x60), value); }
+    public ushort NextHayleyBringNationalDex { get => ReadUInt16LittleEndian(Data.AsSpan(0x6A)); set => WriteUInt16LittleEndian(Data.AsSpan(0x6A), value); }
+
+    public RanchToy GetRanchToy(int index)
+    {
+        if ((uint)index >= MaxToys)
+            throw new ArgumentOutOfRangeException(nameof(index));
+
+        int toyOffset = ToyBaseOffset + (RanchToy.SIZE * index);
+        var data = Data.Slice(toyOffset, RanchToy.SIZE);
+        return new RanchToy(data);
+    }
+
+    public void SetRanchToy(RanchToy toy, int index)
+    {
+        if ((uint)index >= MaxToys)
+            throw new ArgumentOutOfRangeException(nameof(index));
+
+        int toyOffset = ToyBaseOffset + (RanchToy.SIZE * index);
+        SetData(Data, toy.Data, toyOffset);
+    }
+
+    public RanchMii GetRanchMii(int index)
+    {
+        if ((uint)index >= MiiCount)
+            throw new ArgumentOutOfRangeException(nameof(index));
+
+        int offset = MiiDataOffset + (RanchMii.SIZE * index);
+        var data = Data.Slice(offset, RanchMii.SIZE);
+        return new RanchMii(data);
+    }
+
+    public void SetRanchMii(RanchMii trainer, int index)
+    {
+        if ((uint)index >= MiiCount)
+            throw new ArgumentOutOfRangeException(nameof(index));
+
+        int offset = MiiDataOffset + (RanchMii.SIZE * index);
+        SetData(Data, trainer.Data, offset);
+    }
+
+    public RanchTrainerMii GetRanchTrainerMii(int index)
+    {
+        if ((uint)index >= TrainerMiiCount)
+            throw new ArgumentOutOfRangeException(nameof(index));
+
+        int offset = TrainerMiiDataOffset + (RanchTrainerMii.SIZE * index);
+        var data = Data.Slice(offset, RanchTrainerMii.SIZE);
+        return new RanchTrainerMii(data);
+    }
+
+    public void SetRanchTrainerMii(RanchTrainerMii mii, int index)
+    {
+        if ((uint)index >= TrainerMiiCount)
+            throw new ArgumentOutOfRangeException(nameof(index));
+
+        int offset = TrainerMiiDataOffset + (RanchTrainerMii.SIZE * index);
+        SetData(Data, mii.Data, offset);
+    }
 
     protected override void SetChecksums()
     {
         // ensure the final data is written if the user screws stuff up
-        WriteInt32BigEndian(Data.AsSpan(FinalCountOffset), FinalCount);
-        var goodlen = (FinalCountOffset + 4);
+        WriteInt32BigEndian(Data.AsSpan(DataEndMarkerOffset), DataEndMarker);
+        var goodlen = (DataEndMarkerOffset + 4);
         Array.Clear(Data, goodlen, Data.Length - goodlen);
 
         // 20 byte SHA checksum at the top of the file, which covers all data that follows.
@@ -87,6 +158,78 @@ public sealed class SAV4Ranch : BulkStorage, ISaveFileRevision
         SetData(result, 0);
     }
 
+    protected override byte[] DecryptPKM(byte[] data)
+    {
+        var pokeData = PokeCrypto.DecryptArray45(data.Slice(0, PokeCrypto.SIZE_4STORED));
+        var ranchData = data.AsSpan(PokeCrypto.SIZE_4STORED, 0x1C);
+        var finalData = new byte[SIZE_STORED];
+
+        pokeData.CopyTo(finalData, 0);
+        ranchData.CopyTo(finalData.AsSpan(PokeCrypto.SIZE_4STORED));
+        return finalData;
+    }
+
+    public void WriteBoxSlotInternal(PKM pk, Span<byte> data, int offset, string htName = "", ushort htTID = 0, ushort htSID = 0, RanchOwnershipType type = RanchOwnershipType.Hayley)
+    {
+        RK4 rk = (RK4)this.GetCompatiblePKM(pk);
+        rk.OwnershipType = type;
+        rk.HT_TID = htTID;
+        rk.HT_SID = htSID;
+        rk.HT_Name = htName;
+
+        WriteBoxSlot(rk, data, offset);
+    }
+
+    public override void WriteBoxSlot(PKM pk, Span<byte> data, int offset)
+    {
+        bool isBlank = pk.Data.SequenceEqual(BlankPKM.Data);
+        if (pk is not RK4 rk4)
+        {
+            WriteBoxSlotInternal(pk, data, offset);
+            return;
+        }
+
+        if (!isBlank && rk4.OwnershipType == RanchOwnershipType.None)
+            rk4.OwnershipType = RanchOwnershipType.Hayley; // Pokemon without an Ownership type get erased when the save is loaded. Hayley is considered 'default'.
+
+        base.WriteBoxSlot(rk4, data, offset);
+        if ((offset + SIZE_STORED) > DataEndMarkerOffset)
+        {
+            DataEndMarkerOffset = (offset + SIZE_STORED);
+            WriteInt32BigEndian(Data.AsSpan(0x3C), DataEndMarkerOffset);
+            WriteInt32BigEndian(Data.AsSpan(DataEndMarkerOffset), DataEndMarker);
+        }
+
+        int pkStart = PokemonCountOffset + 4;
+        int pkEnd = DataEndMarkerOffset;
+        int pkCount = (pkEnd - pkStart) / SIZE_STORED;
+        WriteInt32BigEndian(Data.AsSpan(PokemonCountOffset), pkCount);
+    }
+
+    private TimeSpan PlayedSpan
+    {
+        get => TimeSpan.FromSeconds(TotalSeconds);
+        set => TotalSeconds = (uint)value.TotalSeconds;
+    }
+
+    public override int PlayedHours
+    {
+        get => (ushort)PlayedSpan.TotalHours;
+        set { var time = PlayedSpan; PlayedSpan = time - TimeSpan.FromHours(time.TotalHours) + TimeSpan.FromHours(value); }
+    }
+
+    public override int PlayedMinutes
+    {
+        get => (byte)PlayedSpan.Minutes;
+        set { var time = PlayedSpan; PlayedSpan = time - TimeSpan.FromMinutes(time.Minutes) + TimeSpan.FromMinutes(value); }
+    }
+
+    public override int PlayedSeconds
+    {
+        get => (byte)PlayedSpan.Seconds;
+        set { var time = PlayedSpan; PlayedSpan = time - TimeSpan.FromSeconds(time.Seconds) + TimeSpan.FromSeconds(value); }
+    }
+
     public override string GetString(ReadOnlySpan<byte> data) => StringConverter4GC.GetStringUnicode(data);
 
     public override int SetString(Span<byte> destBuffer, ReadOnlySpan<char> value, int maxLength, StringConverterOption option)
diff --git a/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchLevel.cs b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchLevel.cs
new file mode 100644
index 000000000..61db27314
--- /dev/null
+++ b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchLevel.cs
@@ -0,0 +1,61 @@
+namespace PKHeX.Core;
+
+/// <summary>
+/// Logic to calculate max counts denoted by the ranch level in My Pokemon Ranch
+/// </summary>
+public static class RanchLevel
+{
+    public static int GetLevel(byte levelIndex) => levelIndex + 1;
+
+    public static int GetMaxMiis(byte levelIndex) => levelIndex switch
+    {
+        >= 11 => 20,
+        >= 08 => 15,
+        >= 04 => 10,
+        _ => 5,
+    };
+
+    public static int GetMaxToys(byte levelIndex) => levelIndex switch
+    {
+        >= 25 => 6,
+        >= 20 => 5,
+        >= 15 => 4,
+        >= 11 => 3,
+        >= 08 => 2,
+        _ => 1,
+    };
+
+    public static int GetSlotCount(byte levelIndex) => levelIndex switch
+    {
+        00 => 020,
+        01 => 025,
+        02 => 030,
+        03 => 040,
+        04 => 050,
+        05 => 060,
+        06 => 080,
+
+        07 => 100,
+        08 => 150,
+        09 => 200,
+        10 => 250,
+        11 => 300,
+        12 => 350,
+
+        13 => 400,
+        14 => 500,
+        15 => 600,
+        16 => 700,
+        17 => 800,
+        18 => 900,
+        19 => 1000,
+
+        20 => 1000,
+        21 => 1000,
+        22 => 1000,
+        23 => 1000,
+        24 => 1000,
+
+        _ => 1500,
+    };
+}
diff --git a/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchMii.cs b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchMii.cs
new file mode 100644
index 000000000..b4ae3091a
--- /dev/null
+++ b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchMii.cs
@@ -0,0 +1,22 @@
+using System;
+using static System.Buffers.Binary.BinaryPrimitives;
+
+namespace PKHeX.Core;
+
+public sealed class RanchMii
+{
+    public const int SIZE = 0x28;
+    public readonly byte[] Data;
+
+    public RanchMii(byte[] data) => Data = data;
+
+    public uint MiiId { get => ReadUInt32BigEndian(Data); set => WriteUInt32BigEndian(Data, value); }
+    public uint SystemId { get => ReadUInt32BigEndian(Data.AsSpan(0x04)); set => WriteUInt32BigEndian(Data.AsSpan(0x04), value); }
+    public Span<byte> Name_Trash => Data.AsSpan(0x10, 0x18);
+
+    public string MiiName
+    {
+        get => StringConverter4GC.GetStringUnicode(Name_Trash);
+        set => StringConverter4GC.SetStringUnicode(value.AsSpan(), Name_Trash, value.Length, StringConverterOption.None);
+    }
+}
diff --git a/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchOwnershipType.cs b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchOwnershipType.cs
new file mode 100644
index 000000000..28d555832
--- /dev/null
+++ b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchOwnershipType.cs
@@ -0,0 +1,16 @@
+namespace PKHeX.Core;
+
+public enum RanchOwnershipType : byte
+{
+    None              = 0,
+    Trainer           = 1,
+    Hayley            = 4,
+    Hayley_Traded     = 5,
+}
+
+// this might actually be an index to which Mii trainer owns the pokemon
+public enum RanchOwnershipStatus : ushort
+{
+    None = 0,
+    Traded = 2,
+}
diff --git a/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchToy.cs b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchToy.cs
new file mode 100644
index 000000000..31b87d2f2
--- /dev/null
+++ b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchToy.cs
@@ -0,0 +1,16 @@
+using System;
+using static System.Buffers.Binary.BinaryPrimitives;
+
+namespace PKHeX.Core;
+
+public sealed class RanchToy
+{
+    public const int SIZE = 0x08;
+    public readonly byte[] Data;
+
+    public RanchToy(byte[] ranchToyData) => Data = ranchToyData;
+
+    public RanchToyType ToyType { get => (RanchToyType)Data[0]; set => Data[0] = (byte)value; }
+    // 1,2,3 alignment
+    public uint ToyMetadata { get => ReadUInt32BigEndian(Data.AsSpan(4)); set => WriteUInt32BigEndian(Data.AsSpan(4), value); }
+}
diff --git a/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchToyType.cs b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchToyType.cs
new file mode 100644
index 000000000..8ec52272f
--- /dev/null
+++ b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchToyType.cs
@@ -0,0 +1,34 @@
+namespace PKHeX.Core;
+
+/// <summary>
+/// Toys used in My Pokemon Ranch save files.
+/// </summary>
+public enum RanchToyType : byte
+{
+    None = 0,
+    Poke_Balloons = 1,
+    Slippery_Peel = 2,
+    Poke_Bell = 3,
+    BounceBack_Ball = 4,
+    Poke_Rocket = 5,
+    Poke_Cushion = 6,
+    Parade_Drum = 7,
+    Bonfire = 8,
+    Leader_Flag = 9,
+    Fountain = 10,
+    Ice_Block = 11,
+    Poke_Microphone = 12,
+    Burst_Ball = 13,
+    Poke_Palette = 14,
+    Poke_Pendulum = 15,
+    Pitfall = 16,
+    Training_Bag = 17,
+    Stinky_Ball = 18,
+    Snowman = 19,
+    Round_Rock = 20,
+    Spin_Ride = 21,
+    Sprint_Stand = 22,
+    Attractor = 23,
+    Challenger = 24,
+    Toy_Box = 25,
+}
diff --git a/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchTrainerMii.cs b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchTrainerMii.cs
new file mode 100644
index 000000000..0eb3f8497
--- /dev/null
+++ b/PKHeX.Core/Saves/Substructures/Gen4/Ranch/RanchTrainerMii.cs
@@ -0,0 +1,33 @@
+using System;
+using static System.Buffers.Binary.BinaryPrimitives;
+
+namespace PKHeX.Core;
+
+public sealed class RanchTrainerMii
+{
+    public const int SIZE = 0x2C;
+    public readonly byte[] Data;
+
+    public RanchTrainerMii(byte[] data) => Data = data;
+
+    public uint MiiId    { get => ReadUInt32BigEndian(Data.AsSpan(0x00)); set => WriteUInt32BigEndian(Data.AsSpan(0x00), value); }
+    public uint SystemId { get => ReadUInt32BigEndian(Data.AsSpan(0x04)); set => WriteUInt32BigEndian(Data.AsSpan(0x04), value); }
+
+    public ushort TrainerId { get => ReadUInt16LittleEndian(Data.AsSpan(0x0C)); set => WriteUInt16LittleEndian(Data.AsSpan(0x0C), value); }
+    public ushort SecretId  { get => ReadUInt16LittleEndian(Data.AsSpan(0x0E)); set => WriteUInt16LittleEndian(Data.AsSpan(0x0E), value); }
+
+    private Span<byte> Trainer_Trash => Data.AsSpan(0x10, 0x10);
+
+    // 0x20-23: ??
+    // 0x24:    ??
+    // 0x25:    ??
+    // 0x26-27: ??
+    // 0x28-29: ??
+    // 0x2A-2B: ??
+
+    public string TrainerName
+    {
+        get => StringConverter4.GetString(Trainer_Trash);
+        set => StringConverter4.SetString(Trainer_Trash, value.AsSpan(), 7);
+    }
+}
diff --git a/README.md b/README.md
index d4a969695..7c7ce029f 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Pokémon core series save editor, programmed in [C#](https://en.wikipedia.org/wi
 Supports the following files:
 * Save files ("main", \*.sav, \*.dsv, \*.dat, \*.gci, \*.bin)
 * GameCube Memory Card files (\*.raw, \*.bin) containing GC Pokémon savegames.
-* Individual Pokémon entity files (.pk\*, \*.ck3, \*.xk3, \*.pb7, \*.sk2, \*.bk4)
+* Individual Pokémon entity files (.pk\*, \*.ck3, \*.xk3, \*.pb7, \*.sk2, \*.bk4, \*.rk4)
 * Mystery Gift files (\*.pgt, \*.pcd, \*.pgf, .wc\*) including conversion to .pk\*
 * Importing GO Park entities (\*.gp1) including conversion to .pb7
 * Importing teams from Decrypted 3DS Battle Videos