diff --git a/src/core/hle/service/mii/mii.cpp b/src/core/hle/service/mii/mii.cpp
index c2263569d..39e4e937a 100644
--- a/src/core/hle/service/mii/mii.cpp
+++ b/src/core/hle/service/mii/mii.cpp
@@ -68,13 +68,14 @@ private:
 
     void IsUpdated(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
-        const auto unknown{rp.PopRaw<u32>()};
+        const auto source{rp.PopRaw<Source>()};
 
-        LOG_WARNING(Service_Mii, "(STUBBED) called with unknown={:08X}", unknown);
+        LOG_DEBUG(Service_Mii, "called with source={}", source);
 
         IPC::ResponseBuilder rb{ctx, 3};
         rb.Push(RESULT_SUCCESS);
-        rb.Push(false);
+        rb.Push(db.CheckUpdatedFlag());
+        db.ResetUpdatedFlag();
     }
 
     void IsFullDatabase(Kernel::HLERequestContext& ctx) {
@@ -87,9 +88,9 @@ private:
 
     void GetCount(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
-        const auto unknown{rp.PopRaw<u32>()};
+        const auto source{rp.PopRaw<Source>()};
 
-        LOG_DEBUG(Service_Mii, "called with unknown={:08X}", unknown);
+        LOG_DEBUG(Service_Mii, "called with source={}", source);
 
         IPC::ResponseBuilder rb{ctx, 3};
         rb.Push(RESULT_SUCCESS);
@@ -100,8 +101,10 @@ private:
     void Get(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
         const auto size{rp.PopRaw<u32>()};
+        const auto source{rp.PopRaw<Source>()};
 
-        LOG_DEBUG(Service_Mii, "called with size={:08X}, offset={:08X}", size, offsets[0]);
+        LOG_DEBUG(Service_Mii, "called with size={:08X}, offset={:08X}, source={}", size,
+                  offsets[0], source);
 
         u32 read_size{};
         ctx.WriteBuffer(SerializeArray(&MiiManager::GetInfoElement, offsets[0], size, read_size));
@@ -116,8 +119,10 @@ private:
     void Get1(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
         const auto size{rp.PopRaw<u32>()};
+        const auto source{rp.PopRaw<Source>()};
 
-        LOG_DEBUG(Service_Mii, "called with size={:08X}, offset={:08X}", size, offsets[1]);
+        LOG_DEBUG(Service_Mii, "called with size={:08X}, offset={:08X}, source={}", size,
+                  offsets[1], source);
 
         u32 read_size{};
         ctx.WriteBuffer(SerializeArray(&MiiManager::GetInfo, offsets[1], size, read_size));
@@ -157,8 +162,10 @@ private:
     void Get2(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
         const auto size{rp.PopRaw<u32>()};
+        const auto source{rp.PopRaw<Source>()};
 
-        LOG_DEBUG(Service_Mii, "called with size={:08X}, offset={:08X}", size, offsets[2]);
+        LOG_DEBUG(Service_Mii, "called with size={:08X}, offset={:08X}, source={}", size,
+                  offsets[2], source);
 
         u32 read_size{};
         ctx.WriteBuffer(
@@ -174,8 +181,10 @@ private:
     void Get3(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
         const auto size{rp.PopRaw<u32>()};
+        const auto source{rp.PopRaw<Source>()};
 
-        LOG_DEBUG(Service_Mii, "called with size={:08X}, offset={:08X}", size, offsets[3]);
+        LOG_DEBUG(Service_Mii, "called with size={:08X}, offset={:08X}, source={}", size,
+                  offsets[3], source);
 
         u32 read_size{};
         ctx.WriteBuffer(SerializeArray(&MiiManager::GetStoreData, offsets[3], size, read_size));
diff --git a/src/core/hle/service/mii/mii_manager.cpp b/src/core/hle/service/mii/mii_manager.cpp
index 083c62b1e..7011ea2bd 100644
--- a/src/core/hle/service/mii/mii_manager.cpp
+++ b/src/core/hle/service/mii/mii_manager.cpp
@@ -204,6 +204,14 @@ MiiInfo MiiManager::CreateDefault(u32 index) {
     return ConvertStoreDataToInfo(new_mii);
 }
 
+bool MiiManager::CheckUpdatedFlag() const {
+    return updated_flag;
+}
+
+void MiiManager::ResetUpdatedFlag() {
+    updated_flag = false;
+}
+
 bool MiiManager::Empty() const {
     return Size() == 0;
 }
@@ -213,6 +221,7 @@ bool MiiManager::Full() const {
 }
 
 void MiiManager::Clear() {
+    updated_flag = true;
     std::fill(database.miis.begin(), database.miis.end(), MiiStoreData{});
 }
 
@@ -244,6 +253,7 @@ bool MiiManager::Remove(Common::UUID uuid) {
     if (iter == database.miis.end())
         return false;
 
+    updated_flag = true;
     *iter = MiiStoreData{};
     EnsureDatabasePartition();
     return true;
@@ -277,6 +287,7 @@ bool MiiManager::Move(Common::UUID uuid, u32 new_index) {
     if (index == INVALID_INDEX || new_index >= MAX_MIIS)
         return false;
 
+    updated_flag = true;
     const auto moving = database.miis[index];
     const auto replacing = database.miis[new_index];
     if (replacing.uuid) {
@@ -294,6 +305,7 @@ bool MiiManager::Move(Common::UUID uuid, u32 new_index) {
 bool MiiManager::AddOrReplace(const MiiStoreData& data) {
     const auto index = IndexOf(data.uuid);
 
+    updated_flag = true;
     if (index == INVALID_INDEX) {
         const auto size = Size();
         if (size == MAX_MIIS)
diff --git a/src/core/hle/service/mii/mii_manager.h b/src/core/hle/service/mii/mii_manager.h
index f7e3d2cf9..bf955930d 100644
--- a/src/core/hle/service/mii/mii_manager.h
+++ b/src/core/hle/service/mii/mii_manager.h
@@ -226,6 +226,9 @@ public:
     MiiInfo CreateRandom(RandomParameters params);
     MiiInfo CreateDefault(u32 index);
 
+    bool CheckUpdatedFlag() const;
+    void ResetUpdatedFlag();
+
     bool Empty() const;
     bool Full() const;
 
@@ -254,6 +257,7 @@ private:
     void EnsureDatabasePartition();
 
     MiiDatabase database;
+    bool updated_flag = false;
 };
 
 }; // namespace Service::Mii