diff --git a/BizHawk.MultiClient/Global.cs b/BizHawk.MultiClient/Global.cs
index d02c18bb80..ecaf0cd5eb 100644
--- a/BizHawk.MultiClient/Global.cs
+++ b/BizHawk.MultiClient/Global.cs
@@ -149,6 +149,7 @@ namespace BizHawk.MultiClient
 		{
 			{"Atari 2600 Basic Controller", new Dictionary<string, string>() {{"Reset", "r"}, {"Select", "s"}}},
 			{"Gameboy Controller", new Dictionary<string, string>() {{"Power", "P"}}},
+			{"GBA Controller", new Dictionary<string, string>() {{"Power", "P"}}},
 			{"Genesis 3-Button Controller", new Dictionary<string, string>() {{"Reset", "r"}}},
 			{"NES Controller", new Dictionary<string, string>() {{"Reset", "r"}, {"Power", "P"}, {"FDS Eject", "E"}, {"FDS Insert 0", "0"}, {"FDS Insert 1", "1"}, {"VS Coin 1", "c"}, {"VS Coin 2", "C"}}},
 			{"SNES Controller", new Dictionary<string, string>() {{"Power", "P"}, {"Reset", "r"}}},
diff --git a/BizHawk.MultiClient/MainForm.Movie.cs b/BizHawk.MultiClient/MainForm.Movie.cs
index 5d95417fe0..db98538a62 100644
--- a/BizHawk.MultiClient/MainForm.Movie.cs
+++ b/BizHawk.MultiClient/MainForm.Movie.cs
@@ -85,6 +85,17 @@ namespace BizHawk.MultiClient
 
 		public void RecordMovie()
 		{
+			// put any BEETA quality cores here
+			if (Global.Emulator is Emulation.Consoles.Nintendo.GBA.GBA)
+			{
+				var result = MessageBox.Show
+					(this, "Thanks for using Bizhawk!  The emulation core you have selected " +
+					"is currently BETA-status.  We appreciate your help in testing Bizhawk. " +
+					"You can record a movie on this core if you'd like to, but expect to " +
+					"encounter bugs and sync problems.  Continue?", "BizHawk", MessageBoxButtons.YesNo);
+				if (result != System.Windows.Forms.DialogResult.Yes)
+					return;
+			}
 			RecordMovie r = new RecordMovie();
 			r.ShowDialog();
 		}
diff --git a/BizHawk.MultiClient/movie/InputAdapters.cs b/BizHawk.MultiClient/movie/InputAdapters.cs
index 982e62a5df..6cd237bc80 100644
--- a/BizHawk.MultiClient/movie/InputAdapters.cs
+++ b/BizHawk.MultiClient/movie/InputAdapters.cs
@@ -370,8 +370,15 @@ namespace BizHawk.MultiClient
 		private string GetGBAControllersAsMnemonic()
 		{
 			StringBuilder input = new StringBuilder("|");
-			// there's no power button for now
-			input.Append(".|");
+			if (IsBasePressed("Power"))
+			{
+				input.Append(Global.COMMANDS[ControlType]["Power"]);
+			}
+			else
+			{
+				input.Append(".");
+			}
+			input.Append("|");
 			foreach (string button in Global.BUTTONS[ControlType].Keys)
 			{
 				input.Append(IsBasePressed(button) ? Global.BUTTONS[ControlType][button] : ".");
@@ -715,6 +722,26 @@ namespace BizHawk.MultiClient
 		}
 
 		//Redundancy beats crazy if logic that makes new consoles annoying to add
+
+		private void SetGBAControllersAsMnemonic(string mnemonic)
+		{
+			MnemonicChecker c = new MnemonicChecker(mnemonic);
+			MyBoolButtons.Clear();
+			if (mnemonic.Length < 2)
+			{
+				return;
+			}
+			if (mnemonic[1] == 'P')
+			{
+				Force("Power", true);
+			}
+			int start = 3;
+			foreach (string button in Global.BUTTONS[ControlType].Keys)
+			{
+				Force(button, c[start++]);
+			}
+		}
+
 		private void SetSNESControllersAsMnemonic(string mnemonic)
 		{
 			MnemonicChecker c = new MnemonicChecker(mnemonic);
@@ -800,6 +827,11 @@ namespace BizHawk.MultiClient
 				SetC64ControllersAsMnemonic(mnemonic);
 				return;
 			}
+			else if (ControlType == "GBA Controller")
+			{
+				SetGBAControllersAsMnemonic(mnemonic);
+				return;
+			}
 
 			MnemonicChecker c = new MnemonicChecker(mnemonic);
 
diff --git a/BizHawk.MultiClient/output/dll/libmeteor.dll b/BizHawk.MultiClient/output/dll/libmeteor.dll
index adb24f1a77..18b0624d24 100644
Binary files a/BizHawk.MultiClient/output/dll/libmeteor.dll and b/BizHawk.MultiClient/output/dll/libmeteor.dll differ
diff --git a/libmeteor/include/ameteor/memory.hpp b/libmeteor/include/ameteor/memory.hpp
index d55cb7ff27..4c2607dc2a 100644
--- a/libmeteor/include/ameteor/memory.hpp
+++ b/libmeteor/include/ameteor/memory.hpp
@@ -97,11 +97,7 @@ namespace AMeteor
 				return m_cart;
 			}
 
-			void DeleteCart()
-			{
-				if (m_cart)
-					delete m_cart;
-			}
+			void DeleteCart();
 
 			bool HasBios () const
 			{
diff --git a/libmeteor/source/memory.cpp b/libmeteor/source/memory.cpp
index 6fb2b01c84..4ba55bdee5 100644
--- a/libmeteor/source/memory.cpp
+++ b/libmeteor/source/memory.cpp
@@ -96,12 +96,21 @@ namespace AMeteor
 		}
 	}
 
+	void Memory::DeleteCart()
+	{
+		if (m_cart)
+			delete m_cart;
+		m_cart = NULL;
+		print_bizhawk("Cart Memory unloaded.\n");
+	}
+
 	void Memory::SetCartType (uint8_t type)
 	{
 		if (m_cart)
 		{
 			delete m_cart;
 			print_bizhawk("Cart Memory unloaded.\n");
+			m_cart = NULL;
 		}
 		switch (type)
 		{