diff --git a/Source/Core/Core/HW/GBAPadEmu.cpp b/Source/Core/Core/HW/GBAPadEmu.cpp
index fd68bc9a1d..2a84a5345b 100644
--- a/Source/Core/Core/HW/GBAPadEmu.cpp
+++ b/Source/Core/Core/HW/GBAPadEmu.cpp
@@ -10,12 +10,6 @@
 #include "InputCommon/ControllerEmu/ControlGroup/Buttons.h"
 #include "InputCommon/GCPadStatus.h"
 
-static const u16 dpad_bitmasks[] = {PAD_BUTTON_UP, PAD_BUTTON_DOWN, PAD_BUTTON_LEFT,
-                                    PAD_BUTTON_RIGHT};
-
-static const u16 button_bitmasks[] = {PAD_BUTTON_B,  PAD_BUTTON_A,  PAD_TRIGGER_L,
-                                      PAD_TRIGGER_R, PAD_TRIGGER_Z, PAD_BUTTON_START};
-
 GBAPad::GBAPad(const unsigned int index) : m_reset_pending(false), m_index(index)
 {
   using Translatability = ControllerEmu::Translatability;
@@ -67,15 +61,25 @@ GCPadStatus GBAPad::GetInput()
   const auto lock = GetStateLock();
   GCPadStatus pad = {};
 
+  static constexpr u16 dpad_bitmasks[] = {
+      GBA_BUTTON_UP,
+      GBA_BUTTON_DOWN,
+      GBA_BUTTON_LEFT,
+      GBA_BUTTON_RIGHT,
+  };
+
+  static constexpr u16 button_bitmasks[] = {
+      GBA_BUTTON_B, GBA_BUTTON_A, GBA_BUTTON_L, GBA_BUTTON_R, GBA_BUTTON_SELECT, GBA_BUTTON_START,
+  };
+
   // Buttons
   m_buttons->GetState(&pad.button, button_bitmasks, m_input_override_function);
 
   // DPad
   m_dpad->GetState(&pad.button, dpad_bitmasks, m_input_override_function);
 
-  // Use X button as a reset signal
   if (m_reset_pending)
-    pad.button |= PAD_BUTTON_X;
+    pad.button |= PAD_STATUS_RESET_SIGNAL;
   m_reset_pending = false;
 
   return pad;
diff --git a/Source/Core/Core/HW/GBAPadEmu.h b/Source/Core/Core/HW/GBAPadEmu.h
index c9c38f1e5a..9fc7710fc2 100644
--- a/Source/Core/Core/HW/GBAPadEmu.h
+++ b/Source/Core/Core/HW/GBAPadEmu.h
@@ -23,6 +23,21 @@ enum class GBAPadGroup
 class GBAPad : public ControllerEmu::EmulatedController
 {
 public:
+  static constexpr u16 GBA_BUTTON_A = 1u << 0;
+  static constexpr u16 GBA_BUTTON_B = 1u << 1;
+  static constexpr u16 GBA_BUTTON_SELECT = 1u << 2;
+  static constexpr u16 GBA_BUTTON_START = 1u << 3;
+  static constexpr u16 GBA_BUTTON_RIGHT = 1u << 4;
+  static constexpr u16 GBA_BUTTON_LEFT = 1u << 5;
+  static constexpr u16 GBA_BUTTON_UP = 1u << 6;
+  static constexpr u16 GBA_BUTTON_DOWN = 1u << 7;
+  static constexpr u16 GBA_BUTTON_R = 1u << 8;
+  static constexpr u16 GBA_BUTTON_L = 1u << 9;
+
+  static constexpr u16 GBA_ALL_BUTTONS = (1u << 10) - 1;
+
+  static constexpr u16 PAD_STATUS_RESET_SIGNAL = 1u << 10;
+
   explicit GBAPad(unsigned int index);
   GCPadStatus GetInput();
   void SetReset(bool reset);
diff --git a/Source/Core/Core/HW/SI/SI_DeviceGBAEmu.cpp b/Source/Core/Core/HW/SI/SI_DeviceGBAEmu.cpp
index 36ccc15bc0..a7c342e1b4 100644
--- a/Source/Core/Core/HW/SI/SI_DeviceGBAEmu.cpp
+++ b/Source/Core/Core/HW/SI/SI_DeviceGBAEmu.cpp
@@ -14,6 +14,7 @@
 #include "Core/CoreTiming.h"
 #include "Core/HW/GBACore.h"
 #include "Core/HW/GBAPad.h"
+#include "Core/HW/GBAPadEmu.h"
 #include "Core/HW/SI/SI.h"
 #include "Core/HW/SI/SI_DeviceGCController.h"
 #include "Core/HW/SystemTimers.h"
@@ -128,25 +129,11 @@ DataResponse CSIDevice_GBAEmu::GetData(u32& hi, u32& low)
   SerialInterface::CSIDevice_GCController::HandleMoviePadStatus(m_system.GetMovie(),
                                                                 m_device_number, &pad_status);
 
-  static constexpr std::array<PadButton, 10> buttons_map = {
-      PadButton::PAD_BUTTON_A,      // A
-      PadButton::PAD_BUTTON_B,      // B
-      PadButton::PAD_TRIGGER_Z,     // Select
-      PadButton::PAD_BUTTON_START,  // Start
-      PadButton::PAD_BUTTON_RIGHT,  // Right
-      PadButton::PAD_BUTTON_LEFT,   // Left
-      PadButton::PAD_BUTTON_UP,     // Up
-      PadButton::PAD_BUTTON_DOWN,   // Down
-      PadButton::PAD_TRIGGER_R,     // R
-      PadButton::PAD_TRIGGER_L,     // L
-  };
+  // Note: The misused GCPadStatus contains GBA button values.
+  m_keys = pad_status.button & GBAPad::GBA_ALL_BUTTONS;
 
-  m_keys = 0;
-  for (size_t i = 0; i < buttons_map.size(); ++i)
-    m_keys |= static_cast<u16>(static_cast<bool>((pad_status.button & buttons_map[i]))) << i;
-
-  // Use X button as a reset signal for NetPlay/Movies
-  if (pad_status.button & PadButton::PAD_BUTTON_X)
+  // A reset signal for NetPlay/Movies
+  if (pad_status.button & GBAPad::PAD_STATUS_RESET_SIGNAL)
     m_core->Reset();
 
   return DataResponse::NoData;