diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/MGBAHawk.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/MGBAHawk.cs
index f000310679..206ba7b526 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/MGBAHawk.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/MGBAHawk.cs
@@ -52,7 +52,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 				ser.Register<IMemoryDomains>(_memoryDomains);
 
 				ServiceProvider = ser;
-				CoreComm = comm;
 				PutSettings(_settings);
 
 				_tracer = new TraceBuffer
@@ -149,8 +148,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 			IsLagFrame = false;
 		}
 
-		public CoreComm CoreComm { get; }
-
 		public void Dispose()
 		{
 			if (_core != IntPtr.Zero)
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/VBANext.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/VBANext.cs
index 2ca2657c63..65a96b83ec 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/VBANext.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/VBANext.cs
@@ -19,9 +19,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 			ser.Register<IDisassemblable>(new ArmV4Disassembler());
 			ServiceProvider = ser;
 
-			CoreComm = comm;
-
-			byte[] biosfile = CoreComm.CoreFileProvider.GetFirmware("GBA", "Bios", true, "GBA bios file is mandatory.");
+			byte[] biosfile = comm.CoreFileProvider.GetFirmware("GBA", "Bios", true, "GBA bios file is mandatory.");
 			if (file.Length > 32 * 1024 * 1024)
 				throw new ArgumentException("ROM is too big to be a GBA ROM!");
 			if (biosfile.Length != 16 * 1024)
@@ -131,8 +129,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 		/// </summary>
 		public string GameCode { get; }
 
-		public CoreComm CoreComm { get; }
-
 		public void Dispose()
 		{
 			if (Core != IntPtr.Zero)
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/Gambatte.IEmulator.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/Gambatte.IEmulator.cs
index 8c15640a43..d96826f861 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/Gambatte.IEmulator.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/Gambatte.IEmulator.cs
@@ -91,8 +91,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.Gameboy
 			frameOverflow = 0;
 		}
 
-		public CoreComm CoreComm { get; }
-
 		public void Dispose()
 		{
 			if (GambatteState != IntPtr.Zero)
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/Gambatte.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/Gambatte.cs
index 05de85fb0f..8816e63748 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/Gambatte.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/Gambatte.cs
@@ -34,7 +34,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.Gameboy
 			};
 			ser.Register<ITraceable>(Tracer);
 			InitMemoryCallbacks();
-			CoreComm = comm;
 
 			ThrowExceptionForBadRom(file);
 			BoardName = MapperName(file);
@@ -94,7 +93,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.Gameboy
 				{
 					Bios = comm.CoreFileProvider.GetFirmware("GBC", "World", true, "BIOS Not Found, Cannot Load");
 					IsCgb = true;
-				}				
+				}
+
 				if (LibGambatte.gambatte_loadbios(GambatteState, Bios, (uint)Bios.Length) != 0)
 				{
 					throw new InvalidOperationException($"{nameof(LibGambatte.gambatte_loadbios)}() returned non-zero (bios error)");
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/GambatteLink.IEmulator.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/GambatteLink.IEmulator.cs
index 1458fd746e..53592d3585 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/GambatteLink.IEmulator.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/GambatteLink.IEmulator.cs
@@ -166,8 +166,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.Gameboy
 			IsLagFrame = false;
 		}
 
-		public CoreComm CoreComm { get; }
-
 		public void Dispose()
 		{
 			if (!_disposed)
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/GambatteLink.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/GambatteLink.cs
index 54d27c0c3c..a9f94bc7a3 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/GambatteLink.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/GambatteLink.cs
@@ -17,7 +17,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.Gameboy
 			GambatteLinkSettings linkSettings = (GambatteLinkSettings)settings ?? new GambatteLinkSettings();
 			GambatteLinkSyncSettings linkSyncSettings = (GambatteLinkSyncSettings)syncSettings ?? new GambatteLinkSyncSettings();
 
-			CoreComm = comm;
 			L = new Gameboy(comm.Clone(), leftinfo, leftrom, linkSettings.L, linkSyncSettings.L, deterministic);
 			R = new Gameboy(comm.Clone(), rightinfo, rightrom, linkSettings.R, linkSyncSettings.R, deterministic);