diff --git a/common/include/Utilities/Assertions.h b/common/include/Utilities/Assertions.h
index c35759c578..b2774f24c1 100644
--- a/common/include/Utilities/Assertions.h
+++ b/common/include/Utilities/Assertions.h
@@ -185,11 +185,7 @@ extern pxDoAssertFnType *pxDoAssert;
 #define IndexBoundsAssumeDev(objname, idx, sze) pxAssumeDev((uint)(idx) < (uint)(sze), \
                                                             pxsFmt(L"Array index out of bounds accessing object '%s' (index=%d, size=%d)", objname, (idx), (sze)))
 
-
-extern void pxOnAssert(const DiagnosticOrigin &origin, const wxChar *msg = NULL);
-extern void pxOnAssert(const DiagnosticOrigin &origin, const char *msg);
 extern void pxOnAssert(const DiagnosticOrigin &origin, const wxString &msg);
-extern void pxOnAssert(const DiagnosticOrigin &origin, const FastFormatUnicode &msg);
 
 // --------------------------------------------------------------------------------------
 // jNO_DEFAULT -- disables the default case in a switch, which improves switch optimization
diff --git a/common/include/Utilities/wxGuiTools.h b/common/include/Utilities/wxGuiTools.h
index cadcdf880d..d2d68e6c86 100644
--- a/common/include/Utilities/wxGuiTools.h
+++ b/common/include/Utilities/wxGuiTools.h
@@ -680,8 +680,7 @@ protected:
     wxPoint m_curpos;
     int m_leading;
 
-    virtual void _DoWriteLn(const wxChar *msg);
-    void _DoWriteLn(const wxString msg);
+    virtual void _DoWriteLn(const wxString &msg);
     void _DoWrite(const wxChar *msg);
 
 public:
diff --git a/common/src/Utilities/Exceptions.cpp b/common/src/Utilities/Exceptions.cpp
index b0944bf30f..fc9d52a28f 100644
--- a/common/src/Utilities/Exceptions.cpp
+++ b/common/src/Utilities/Exceptions.cpp
@@ -95,7 +95,7 @@ bool pxAssertImpl_LogIt(const DiagnosticOrigin &origin, const wxChar *msg)
 }
 
 
-DEVASSERT_INLINE void pxOnAssert(const DiagnosticOrigin &origin, const wxChar *msg)
+DEVASSERT_INLINE void pxOnAssert(const DiagnosticOrigin &origin, const wxString &msg)
 {
     // Recursion guard: Allow at least one recursive call.  This is useful because sometimes
     // we get meaningless assertions while unwinding stack traces after exceptions have occurred.
@@ -114,9 +114,9 @@ DEVASSERT_INLINE void pxOnAssert(const DiagnosticOrigin &origin, const wxChar *m
 
     if (pxDoAssert == NULL) {
         // Note: Format uses MSVC's syntax for output window hotlinking.
-        trapit = pxAssertImpl_LogIt(origin, msg);
+        trapit = pxAssertImpl_LogIt(origin, msg.wc_str());
     } else {
-        trapit = pxDoAssert(origin, msg);
+        trapit = pxDoAssert(origin, msg.wc_str());
     }
 
     if (trapit) {
@@ -124,21 +124,6 @@ DEVASSERT_INLINE void pxOnAssert(const DiagnosticOrigin &origin, const wxChar *m
     }
 }
 
-__fi void pxOnAssert(const DiagnosticOrigin &origin, const char *msg)
-{
-    pxOnAssert(origin, fromUTF8(msg));
-}
-
-__fi void pxOnAssert(const DiagnosticOrigin &origin, const wxString &msg)
-{
-    pxOnAssert(origin, msg.wc_str());
-}
-
-__fi void pxOnAssert(const DiagnosticOrigin &origin, const FastFormatUnicode &msg)
-{
-    pxOnAssert(origin, msg.c_str());
-}
-
 // --------------------------------------------------------------------------------------
 //  BaseException  (implementations)
 // --------------------------------------------------------------------------------------
diff --git a/common/src/Utilities/pxWindowTextWriter.cpp b/common/src/Utilities/pxWindowTextWriter.cpp
index c1ab3e425f..f49adb44fc 100644
--- a/common/src/Utilities/pxWindowTextWriter.cpp
+++ b/common/src/Utilities/pxWindowTextWriter.cpp
@@ -84,10 +84,8 @@ pxWindowTextWriter &pxWindowTextWriter::MoveY(int ydelta)
     return *this;
 }
 
-void pxWindowTextWriter::_DoWriteLn(const wxChar *msg)
+void pxWindowTextWriter::_DoWriteLn(const wxString &msg)
 {
-    pxAssert(msg);
-
     int tWidth, tHeight;
     m_dc.GetMultiLineTextExtent(msg, &tWidth, &tHeight);
 
@@ -103,11 +101,6 @@ void pxWindowTextWriter::_DoWriteLn(const wxChar *msg)
     m_curpos.y += tHeight + m_leading;
 }
 
-void pxWindowTextWriter::_DoWriteLn(const wxString msg)
-{
-    _DoWriteLn(msg.wc_str());
-}
-
 // Splits incoming multi-line strings into pieces, and dispatches each line individually
 // to the text writer.
 void pxWindowTextWriter::_DoWrite(const wxChar *msg)
diff --git a/pcsx2/DebugTools/Debug.h b/pcsx2/DebugTools/Debug.h
index 0fdc13725a..6dfece3e73 100644
--- a/pcsx2/DebugTools/Debug.h
+++ b/pcsx2/DebugTools/Debug.h
@@ -227,7 +227,7 @@ public:
 
 	ConsoleLogFromVM( const TraceLogDescriptor* desc ) : _parent( desc ) {}
 
-	bool Write( const wxChar* msg ) const
+	bool Write( const wxString &msg ) const
 	{
 		ConsoleColorScope cs(conColor);
 		Console.WriteRaw( msg );
@@ -239,12 +239,6 @@ public:
 
 		return false;
 	}
-
-	bool Write( const wxString msg ) const
-	{
-		return Write(msg.wc_str());
-	}
-
 };
 
 // --------------------------------------------------------------------------------------