diff --git a/PKHeX.Core/Saves/SAV3.cs b/PKHeX.Core/Saves/SAV3.cs
index b8e7289a0..4f8a5d2b9 100644
--- a/PKHeX.Core/Saves/SAV3.cs
+++ b/PKHeX.Core/Saves/SAV3.cs
@@ -594,5 +594,95 @@ public override void CopyChangesFrom(SaveFile sav)
             SetData(Large, s3.Large, 0);
             SetData(Storage, s3.Storage, 0);
         }
+
+        #region External Connections
+        protected abstract int ExternalEventData { get; }
+        protected int ExternalEventFlags => ExternalEventData + 0x14;
+
+        public uint ColosseumRaw1
+        {
+            get => BitConverter.ToUInt32(Large, ExternalEventData + 7);
+            set => SetData(Large, BitConverter.GetBytes(value), ExternalEventData + 7);
+        }
+
+        public uint ColosseumRaw2
+        {
+            get => BitConverter.ToUInt32(Large, ExternalEventData + 11);
+            set => SetData(Large, BitConverter.GetBytes(value), ExternalEventData + 11);
+        }
+
+        /// <summary>
+        /// PokéCoupons stored by Pokémon Colosseum and XD from Mt. Battle runs. Earned PokéCoupons are also added to <see cref="ColosseumCouponsTotal"/>.
+        /// </summary>
+        /// <remarks>Colosseum/XD caps this at 9,999,999, but will read up to 16,777,215.</remarks>
+        public uint ColosseumCoupons
+        {
+            get => ColosseumRaw1 >> 8;
+            set => ColosseumRaw1 = (value << 8) | (ColosseumRaw1 & 0xFF);
+        }
+
+        /// <summary> Master Ball from JP Colosseum Bonus Disc; for reaching 30,000 <see cref="ColosseumCouponsTotal"/> </summary>
+        public bool ColosseumPokeCouponTitleGold
+        {
+            get => (ColosseumRaw2 & (1 << 0)) != 0;
+            set => ColosseumRaw2 = (ColosseumRaw2 & (1 << 0)) | ((value ? 1u : 0) << 0);
+        }
+
+        /// <summary> Light Ball Pikachu from JP Colosseum Bonus Disc; for reaching 5000 <see cref="ColosseumCouponsTotal"/> </summary>
+        public bool ColosseumPokeCouponTitleSilver
+        {
+            get => (ColosseumRaw2 & (1 << 1)) != 0;
+            set => ColosseumRaw2 = (ColosseumRaw2 & (1 << 1)) | ((value ? 1u : 0) << 1);
+        }
+
+        /// <summary> PP Max from JP Colosseum Bonus Disc; for reaching 2500 <see cref="ColosseumCouponsTotal"/> </summary>
+        public bool ColosseumPokeCouponTitleBronze
+        {
+            get => (ColosseumRaw2 & (1 << 2)) != 0;
+            set => ColosseumRaw2 = (ColosseumRaw2 & (1 << 2)) | ((value ? 1u : 0) << 2);
+        }
+
+        /// <summary> Received Celebi Gift from JP Colosseum Bonus Disc </summary>
+        public bool ColosseumReceivedAgeto
+        {
+            get => (ColosseumRaw2 & (1 << 3)) != 0;
+            set => ColosseumRaw2 = (ColosseumRaw2 & (1 << 3)) | ((value ? 1u : 0) << 3);
+        }
+
+        /// <summary>
+        /// Used by the JP Colosseum bonus disc. Determines PokéCoupon rank to distribute rewards. Unread in International games.
+        /// </summary>
+        /// <remarks>
+        /// Colosseum/XD caps this at 9,999,999.
+        /// </remarks>
+        public uint ColosseumCouponsTotal
+        {
+            get => ColosseumRaw2 >> 8;
+            set => ColosseumRaw2 = (value << 8) | (ColosseumRaw2 & 0xFF);
+        }
+
+        /// <summary> Indicates if this save has connected to RSBOX and triggered the free False Swipe Swablu Egg giveaway. </summary>
+        public bool HasUsedRSBOX
+        {
+            get => GetFlag(ExternalEventFlags + 0, 0);
+            set => SetFlag(ExternalEventFlags + 0, 0, value);
+        }
+
+        /// <summary>
+        /// 1 for ExtremeSpeed Zigzagoon (at 100 deposited), 2 for Pay Day Skitty (at 500 deposited), 3 for Surf Pichu (at 1499 deposited)
+        /// </summary>
+        public int RSBoxDepositEggsUnlocked
+        {
+            get => (Large[ExternalEventFlags] >> 1) & 3;
+            set => Large[ExternalEventFlags] = (byte)((Large[ExternalEventFlags] & ~(3 << 1)) | ((value & 3) << 1));
+        }
+
+        /// <summary> Received Jirachi Gift from Colosseum Bonus Disc </summary>
+        public bool HasReceivedWishmkrJirachi
+        {
+            get => GetFlag(ExternalEventFlags + 2, 0);
+            set => SetFlag(ExternalEventFlags + 2, 0, value);
+        }
+        #endregion
     }
 }
diff --git a/PKHeX.Core/Saves/SAV3E.cs b/PKHeX.Core/Saves/SAV3E.cs
index ca819516f..482d6d3c4 100644
--- a/PKHeX.Core/Saves/SAV3E.cs
+++ b/PKHeX.Core/Saves/SAV3E.cs
@@ -179,13 +179,7 @@ public int SwarmIndex
         public override string GetDaycareRNGSeed(int loc) => BitConverter.ToUInt32(Large, GetDaycareSlotOffset(0, 2)).ToString("X8");  // after the 2 slots, before the step counter
         public override void SetDaycareRNGSeed(int loc, string seed) => BitConverter.GetBytes(Util.GetHexValue(seed)).CopyTo(Large, GetDaycareEXPOffset(2));
 
-        private const int ExternalEventFlags = 0x31C7;
-
-        public bool HasReceivedWishmkrJirachi
-        {
-            get => GetFlag(ExternalEventFlags + 2, 0);
-            set => SetFlag(ExternalEventFlags + 2, 0, value);
-        }
+        protected override int ExternalEventData => 0x31B3;
 
         #region eBerry
         private const int OFFSET_EBERRY = 0x31F8;
diff --git a/PKHeX.Core/Saves/SAV3FRLG.cs b/PKHeX.Core/Saves/SAV3FRLG.cs
index 88aac3bec..d8eb558a7 100644
--- a/PKHeX.Core/Saves/SAV3FRLG.cs
+++ b/PKHeX.Core/Saves/SAV3FRLG.cs
@@ -137,6 +137,8 @@ protected override InventoryPouch3[] GetItems()
         public override string GetDaycareRNGSeed(int loc) => BitConverter.ToUInt16(Large, GetDaycareEXPOffset(2)).ToString("X4"); // after the 2nd slot EXP, before the step counter
         public override void SetDaycareRNGSeed(int loc, string seed) => BitConverter.GetBytes((ushort)Util.GetHexValue(seed)).CopyTo(Large, GetDaycareEXPOffset(2));
 
+        protected override int ExternalEventData => 0x30A7;
+
         #region eBerry
         private const int OFFSET_EBERRY = 0x30EC;
         private const int SIZE_EBERRY = 0x134;
diff --git a/PKHeX.Core/Saves/SAV3RS.cs b/PKHeX.Core/Saves/SAV3RS.cs
index 7bd3a7b50..5305eeb41 100644
--- a/PKHeX.Core/Saves/SAV3RS.cs
+++ b/PKHeX.Core/Saves/SAV3RS.cs
@@ -142,13 +142,7 @@ public int SwarmIndex
         public override string GetDaycareRNGSeed(int loc) => BitConverter.ToUInt16(Large, GetDaycareEXPOffset(2)).ToString("X4");
         public override void SetDaycareRNGSeed(int loc, string seed) => BitConverter.GetBytes((ushort)Util.GetHexValue(seed)).CopyTo(Large, GetDaycareEXPOffset(2));
 
-        private const int ExternalEventFlags = 0x312F;
-
-        public bool HasReceivedWishmkrJirachi
-        {
-            get => GetFlag(ExternalEventFlags + 2, 0);
-            set => SetFlag(ExternalEventFlags + 2, 0, value);
-        }
+        protected override int ExternalEventData => 0x311B;
 
         #region eBerry
         private const int OFFSET_EBERRY = 0x3160;
diff --git a/PKHeX.Core/Saves/Substructures/Gen3/IGen3Hoenn.cs b/PKHeX.Core/Saves/Substructures/Gen3/IGen3Hoenn.cs
index d37924c81..103242742 100644
--- a/PKHeX.Core/Saves/Substructures/Gen3/IGen3Hoenn.cs
+++ b/PKHeX.Core/Saves/Substructures/Gen3/IGen3Hoenn.cs
@@ -12,7 +12,6 @@ public interface IGen3Hoenn
         PokeBlock3Case PokeBlocks { get; set; }
         DecorationInventory3 Decorations { get; set; }
         Swarm3 Swarm { get; set; }
-        bool HasReceivedWishmkrJirachi { get; set; }
 
         IReadOnlyList<Swarm3> DefaultSwarms { get; }
         int SwarmIndex { get; set; }