diff --git a/Source/Core/Core/CoreTiming.cpp b/Source/Core/Core/CoreTiming.cpp
index ad8cb71139..329f63a7ae 100644
--- a/Source/Core/Core/CoreTiming.cpp
+++ b/Source/Core/Core/CoreTiming.cpp
@@ -6,6 +6,7 @@
 #include <cinttypes>
 #include <mutex>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
 #include "Common/Assert.h"
@@ -28,16 +29,14 @@ namespace CoreTiming
 struct EventType
 {
   TimedCallback callback;
-  std::string name;
+  const std::string* name;
 };
 
-static std::vector<EventType> s_event_types;
-
 struct Event
 {
   s64 time;
   u64 userdata;
-  int type;
+  EventType* type;
 };
 
 constexpr bool operator>(const Event& left, const Event& right)
@@ -49,6 +48,10 @@ constexpr bool operator<(const Event& left, const Event& right)
   return left.time < right.time;
 }
 
+// unordered_map stores each element separately as a linked list node so pointers to elements
+// remain stable regardless of rehashes/resizing.
+static std::unordered_map<std::string, EventType> s_event_types;
+
 // STATE_TO_SAVE
 // The queue is a min-heap using std::make_heap/push_heap/pop_heap.
 // We don't use std::priority_queue because we need to be able to serialize, unserialize and
@@ -74,7 +77,7 @@ s64 g_global_timer;
 u64 g_fake_TB_start_value;
 u64 g_fake_TB_start_ticks;
 
-static int s_ev_lost;
+static EventType* s_ev_lost = nullptr;
 
 static void EmptyTimedCallback(u64 userdata, s64 cyclesLate)
 {
@@ -97,38 +100,25 @@ static int CyclesToDowncount(int cycles)
   return static_cast<int>(cycles * s_last_OC_factor);
 }
 
-int RegisterEvent(const std::string& name, TimedCallback callback)
+EventType* RegisterEvent(const std::string& name, TimedCallback callback)
 {
-  EventType type;
-  type.name = name;
-  type.callback = callback;
-
   // check for existing type with same name.
   // we want event type names to remain unique so that we can use them for serialization.
-  for (auto& event_type : s_event_types)
-  {
-    if (name == event_type.name)
-    {
-      WARN_LOG(
-          POWERPC,
-          "Discarded old event type \"%s\" because a new type with the same name was registered.",
-          name.c_str());
-      // we don't know if someone might be holding on to the type index,
-      // so we gut the old event type instead of actually removing it.
-      event_type.name = "_discarded_event";
-      event_type.callback = &EmptyTimedCallback;
-    }
-  }
+  _assert_msg_(POWERPC, s_event_types.find(name) == s_event_types.end(),
+               "CoreTiming Event \"%s\" is already registered. Events should only be registered "
+               "during Init to avoid breaking save states.",
+               name.c_str());
 
-  s_event_types.push_back(type);
-  return static_cast<int>(s_event_types.size() - 1);
+  auto info = s_event_types.emplace(name, EventType{callback, nullptr});
+  EventType* event_type = &info.first->second;
+  event_type->name = &info.first->first;
+  return event_type;
 }
 
 void UnregisterAllEvents()
 {
   _assert_msg_(POWERPC, s_event_queue.empty(), "Cannot unregister events with events pending");
   s_event_types.clear();
-  s_event_types.shrink_to_fit();
 }
 
 void Init()
@@ -179,16 +169,15 @@ void DoState(PointerWrap& p)
     // so, we savestate the event's type's name, and derive ev.type from that when loading.
     std::string name;
     if (pw.GetMode() != PointerWrap::MODE_READ)
-      name = s_event_types[ev.type].name;
+      name = *ev.type->name;
 
     pw.Do(name);
     if (pw.GetMode() == PointerWrap::MODE_READ)
     {
-      auto itr = std::find_if(s_event_types.begin(), s_event_types.end(),
-                              [&](const EventType& evt) { return evt.name == name; });
+      auto itr = s_event_types.find(name);
       if (itr != s_event_types.end())
       {
-        ev.type = static_cast<int>(itr - s_event_types.begin());
+        ev.type = &itr->second;
       }
       else
       {
@@ -231,8 +220,10 @@ void ClearPendingEvents()
   s_event_queue.clear();
 }
 
-void ScheduleEvent(s64 cycles_into_future, int event_type, u64 userdata, FromThread from)
+void ScheduleEvent(s64 cycles_into_future, EventType* event_type, u64 userdata, FromThread from)
 {
+  _assert_msg_(POWERPC, event_type, "Event type is nullptr, will crash now.");
+
   bool from_cpu_thread;
   if (from == FromThread::ANY)
   {
@@ -262,7 +253,7 @@ void ScheduleEvent(s64 cycles_into_future, int event_type, u64 userdata, FromThr
     {
       ERROR_LOG(POWERPC, "Someone scheduled an off-thread \"%s\" event while netplay or "
                          "movie play/record was active.  This is likely to cause a desync.",
-                s_event_types[event_type].name.c_str());
+                event_type->name->c_str());
     }
 
     std::lock_guard<std::mutex> lk(s_ts_write_lock);
@@ -270,7 +261,7 @@ void ScheduleEvent(s64 cycles_into_future, int event_type, u64 userdata, FromThr
   }
 }
 
-void RemoveEvent(int event_type)
+void RemoveEvent(EventType* event_type)
 {
   auto itr = std::remove_if(s_event_queue.begin(), s_event_queue.end(),
                             [&](const Event& e) { return e.type == event_type; });
@@ -283,7 +274,7 @@ void RemoveEvent(int event_type)
   }
 }
 
-void RemoveAllEvents(int event_type)
+void RemoveAllEvents(EventType* event_type)
 {
   MoveEvents();
   RemoveEvent(event_type);
@@ -328,7 +319,7 @@ void Advance()
     s_event_queue.pop_back();
     // NOTICE_LOG(POWERPC, "[Scheduler] %-20s (%lld, %lld)", evt.type->name->c_str(),
     //            g_global_timer, evt.time);
-    s_event_types[evt.type].callback(evt.userdata, g_global_timer - evt.time);
+    evt.type->callback(evt.userdata, g_global_timer - evt.time);
   }
 
   s_is_global_timer_sane = false;
@@ -355,10 +346,8 @@ void LogPendingEvents()
   std::sort(clone.begin(), clone.end());
   for (const Event& ev : clone)
   {
-    INFO_LOG(POWERPC, "PENDING: Now: %" PRId64 " Pending: %" PRId64 " Type: %s (%d)",
-             g_global_timer, ev.time,
-             ev.type < s_event_types.size() ? s_event_types[ev.type].name.c_str() : "<INVALID>",
-             ev.type);
+    INFO_LOG(POWERPC, "PENDING: Now: %" PRId64 " Pending: %" PRId64 " Type: %s", g_global_timer,
+             ev.time, ev.type->name->c_str());
   }
 }
 
@@ -385,17 +374,8 @@ std::string GetScheduledEventsSummary()
   std::sort(clone.begin(), clone.end());
   for (const Event& ev : clone)
   {
-    unsigned int t = ev.type;
-    if (t >= s_event_types.size())
-    {
-      PanicAlertT("Invalid event type %i", t);
-      continue;
-    }
-
-    const std::string& name = s_event_types[ev.type].name;
-
-    text +=
-        StringFromFormat("%s : %" PRIi64 " %016" PRIx64 "\n", name.c_str(), ev.time, ev.userdata);
+    text += StringFromFormat("%s : %" PRIi64 " %016" PRIx64 "\n", ev.type->name->c_str(), ev.time,
+                             ev.userdata);
   }
   return text;
 }
diff --git a/Source/Core/Core/CoreTiming.h b/Source/Core/Core/CoreTiming.h
index 4fd76e4df7..4f209c97bd 100644
--- a/Source/Core/Core/CoreTiming.h
+++ b/Source/Core/Core/CoreTiming.h
@@ -43,9 +43,11 @@ u64 GetIdleTicks();
 
 void DoState(PointerWrap& p);
 
+struct EventType;
+
 // Returns the event_type identifier. if name is not unique, an existing event_type will be
 // discarded.
-int RegisterEvent(const std::string& name, TimedCallback callback);
+EventType* RegisterEvent(const std::string& name, TimedCallback callback);
 void UnregisterAllEvents();
 
 enum class FromThread
@@ -58,12 +60,12 @@ enum class FromThread
 };
 
 // userdata MAY NOT CONTAIN POINTERS. userdata might get written and reloaded from savestates.
-void ScheduleEvent(s64 cycles_into_future, int event_type, u64 userdata = 0,
+void ScheduleEvent(s64 cycles_into_future, EventType* event_type, u64 userdata = 0,
                    FromThread from = FromThread::CPU);
 
 // We only permit one event of each type in the queue at a time.
-void RemoveEvent(int event_type);
-void RemoveAllEvents(int event_type);
+void RemoveEvent(EventType* event_type);
+void RemoveAllEvents(EventType* event_type);
 void Advance();
 void MoveEvents();
 
diff --git a/Source/Core/Core/HW/AudioInterface.cpp b/Source/Core/Core/HW/AudioInterface.cpp
index de062df4aa..92e0e1610b 100644
--- a/Source/Core/Core/HW/AudioInterface.cpp
+++ b/Source/Core/Core/HW/AudioInterface.cpp
@@ -130,7 +130,7 @@ static void GenerateAudioInterrupt();
 static void UpdateInterrupts();
 static void IncreaseSampleCount(const u32 _uAmount);
 static int GetAIPeriod();
-static int et_AI;
+static CoreTiming::EventType* et_AI;
 static void Update(u64 userdata, s64 cyclesLate);
 
 void Init()
diff --git a/Source/Core/Core/HW/DSP.cpp b/Source/Core/Core/HW/DSP.cpp
index 9ad397901c..9fab707330 100644
--- a/Source/Core/Core/HW/DSP.cpp
+++ b/Source/Core/Core/HW/DSP.cpp
@@ -188,8 +188,8 @@ static void UpdateInterrupts();
 static void Do_ARAM_DMA();
 static void GenerateDSPInterrupt(u64 DSPIntType, s64 cyclesLate = 0);
 
-static int et_GenerateDSPInterrupt;
-static int et_CompleteARAM;
+static CoreTiming::EventType* et_GenerateDSPInterrupt;
+static CoreTiming::EventType* et_CompleteARAM;
 
 static void CompleteARAM(u64 userdata, s64 cyclesLate)
 {
diff --git a/Source/Core/Core/HW/DVDInterface.cpp b/Source/Core/Core/HW/DVDInterface.cpp
index 1fdef1a313..ad3236d1b0 100644
--- a/Source/Core/Core/HW/DVDInterface.cpp
+++ b/Source/Core/Core/HW/DVDInterface.cpp
@@ -238,14 +238,14 @@ static u32 s_error_code = 0;
 static bool s_disc_inside = false;
 static bool s_stream = false;
 static bool s_stop_at_track_end = false;
-static int s_finish_executing_command = 0;
-static int s_dtk = 0;
+static CoreTiming::EventType* s_finish_executing_command;
+static CoreTiming::EventType* s_dtk;
 
 static u64 s_last_read_offset;
 static u64 s_last_read_time;
 
-static int s_eject_disc;
-static int s_insert_disc;
+static CoreTiming::EventType* s_eject_disc;
+static CoreTiming::EventType* s_insert_disc;
 
 static void EjectDiscCallback(u64 userdata, s64 cyclesLate);
 static void InsertDiscCallback(u64 userdata, s64 cyclesLate);
diff --git a/Source/Core/Core/HW/DVDThread.cpp b/Source/Core/Core/HW/DVDThread.cpp
index 3601f5bafd..e79de14019 100644
--- a/Source/Core/Core/HW/DVDThread.cpp
+++ b/Source/Core/Core/HW/DVDThread.cpp
@@ -30,7 +30,7 @@ namespace DVDThread
 static void DVDThread();
 
 static void FinishRead(u64 userdata, s64 cycles_late);
-static int s_finish_read;
+static CoreTiming::EventType* s_finish_read;
 
 static std::thread s_dvd_thread;
 static Common::Event s_dvd_thread_start_working;
diff --git a/Source/Core/Core/HW/EXI.cpp b/Source/Core/Core/HW/EXI.cpp
index 9db0a83382..32c6ce80a7 100644
--- a/Source/Core/Core/HW/EXI.cpp
+++ b/Source/Core/Core/HW/EXI.cpp
@@ -23,8 +23,8 @@ bool g_SRAM_netplay_initialized = false;
 
 namespace ExpansionInterface
 {
-static int changeDevice;
-static int updateInterrupts;
+static CoreTiming::EventType* changeDevice;
+static CoreTiming::EventType* updateInterrupts;
 
 static std::array<std::unique_ptr<CEXIChannel>, MAX_EXI_CHANNELS> g_Channels;
 
diff --git a/Source/Core/Core/HW/EXI_DeviceMemoryCard.h b/Source/Core/Core/HW/EXI_DeviceMemoryCard.h
index 53763e7e5f..5cafcfce29 100644
--- a/Source/Core/Core/HW/EXI_DeviceMemoryCard.h
+++ b/Source/Core/Core/HW/EXI_DeviceMemoryCard.h
@@ -9,6 +9,10 @@
 
 #include "Core/HW/EXI_Device.h"
 
+namespace CoreTiming
+{
+struct EventType;
+}
 class MemoryCardBase;
 class PointerWrap;
 
@@ -67,7 +71,8 @@ private:
   };
 
   int card_index;
-  int et_cmd_done, et_transfer_complete;
+  CoreTiming::EventType* et_cmd_done = nullptr;
+  CoreTiming::EventType* et_transfer_complete = nullptr;
   //! memory card state
 
   // STATE_TO_SAVE
diff --git a/Source/Core/Core/HW/ProcessorInterface.cpp b/Source/Core/Core/HW/ProcessorInterface.cpp
index 59ce6a4569..04fec4cd07 100644
--- a/Source/Core/Core/HW/ProcessorInterface.cpp
+++ b/Source/Core/Core/HW/ProcessorInterface.cpp
@@ -31,10 +31,10 @@ static u32 m_FlipperRev;
 static u32 m_Unknown;
 
 // ID and callback for scheduling reset button presses/releases
-static int toggleResetButton;
+static CoreTiming::EventType* toggleResetButton;
 static void ToggleResetButtonCallback(u64 userdata, s64 cyclesLate);
 
-static int iosNotifyResetButton;
+static CoreTiming::EventType* iosNotifyResetButton;
 static void IOSNotifyResetButtonCallback(u64 userdata, s64 cyclesLate);
 
 // Let the PPC know that an external exception is set/cleared
diff --git a/Source/Core/Core/HW/SI.cpp b/Source/Core/Core/HW/SI.cpp
index 55c9c06904..917f70d7e4 100644
--- a/Source/Core/Core/HW/SI.cpp
+++ b/Source/Core/Core/HW/SI.cpp
@@ -23,8 +23,8 @@
 
 namespace SerialInterface
 {
-static int changeDevice;
-static int et_transfer_pending;
+static CoreTiming::EventType* changeDevice;
+static CoreTiming::EventType* et_transfer_pending;
 
 static void RunSIBuffer(u64 userdata, s64 cyclesLate);
 static void UpdateInterrupts();
diff --git a/Source/Core/Core/HW/SystemTimers.cpp b/Source/Core/Core/HW/SystemTimers.cpp
index 6736d191b7..3e8b96381f 100644
--- a/Source/Core/Core/HW/SystemTimers.cpp
+++ b/Source/Core/Core/HW/SystemTimers.cpp
@@ -64,13 +64,14 @@ IPC_HLE_PERIOD: For the Wiimote this is the call schedule:
 
 namespace SystemTimers
 {
-static int et_Dec;
-static int et_VI;
-static int et_AudioDMA;
-static int et_DSP;
-static int et_IPC_HLE;
-static int et_PatchEngine;  // PatchEngine updates every 1/60th of a second by default
-static int et_Throttle;
+static CoreTiming::EventType* et_Dec;
+static CoreTiming::EventType* et_VI;
+static CoreTiming::EventType* et_AudioDMA;
+static CoreTiming::EventType* et_DSP;
+static CoreTiming::EventType* et_IPC_HLE;
+// PatchEngine updates every 1/60th of a second by default
+static CoreTiming::EventType* et_PatchEngine;
+static CoreTiming::EventType* et_Throttle;
 
 static u32 s_cpu_core_clock = 486000000u;  // 486 mhz (its not 485, stop bugging me!)
 
diff --git a/Source/Core/Core/HW/WII_IPC.cpp b/Source/Core/Core/HW/WII_IPC.cpp
index ff24dd3447..67da12be96 100644
--- a/Source/Core/Core/HW/WII_IPC.cpp
+++ b/Source/Core/Core/HW/WII_IPC.cpp
@@ -98,7 +98,7 @@ static u32 arm_irq_masks;
 
 static u32 sensorbar_power;  // do we need to care about this?
 
-static int updateInterrupts;
+static CoreTiming::EventType* updateInterrupts;
 static void UpdateInterrupts(u64 = 0, s64 cyclesLate = 0);
 
 void DoState(PointerWrap& p)
diff --git a/Source/Core/Core/IPC_HLE/WII_IPC_HLE.cpp b/Source/Core/Core/IPC_HLE/WII_IPC_HLE.cpp
index 1720790b75..0934c79f59 100644
--- a/Source/Core/Core/IPC_HLE/WII_IPC_HLE.cpp
+++ b/Source/Core/Core/IPC_HLE/WII_IPC_HLE.cpp
@@ -76,8 +76,8 @@ static ipc_msg_queue request_queue;  // ppc -> arm
 static ipc_msg_queue reply_queue;    // arm -> ppc
 static ipc_msg_queue ack_queue;      // arm -> ppc
 
-static int event_enqueue;
-static int event_sdio_notify;
+static CoreTiming::EventType* event_enqueue;
+static CoreTiming::EventType* event_sdio_notify;
 
 static u64 last_reply_time;
 
diff --git a/Source/Core/Core/MemoryWatcher.cpp b/Source/Core/Core/MemoryWatcher.cpp
index a0fccb973b..3aea80a6b6 100644
--- a/Source/Core/Core/MemoryWatcher.cpp
+++ b/Source/Core/Core/MemoryWatcher.cpp
@@ -15,7 +15,7 @@
 #include "Core/MemoryWatcher.h"
 
 static std::unique_ptr<MemoryWatcher> s_memory_watcher;
-static int s_event;
+static CoreTiming::EventType* s_event;
 static const int MW_RATE = 600;  // Steps per second
 
 static void MWCallback(u64 userdata, s64 cyclesLate)
diff --git a/Source/Core/Core/PowerPC/PowerPC.cpp b/Source/Core/Core/PowerPC/PowerPC.cpp
index 68b21ab0e0..e7d9e8617d 100644
--- a/Source/Core/Core/PowerPC/PowerPC.cpp
+++ b/Source/Core/Core/PowerPC/PowerPC.cpp
@@ -36,7 +36,7 @@ BreakPoints breakpoints;
 MemChecks memchecks;
 PPCDebugInterface debug_interface;
 
-static int s_invalidate_cache_thread_safe;
+static CoreTiming::EventType* s_invalidate_cache_thread_safe;
 static void InvalidateCacheThreadSafe(u64 userdata, s64 cyclesLate)
 {
   ppcState.iCache.Invalidate(static_cast<u32>(userdata));
diff --git a/Source/Core/VideoCommon/CommandProcessor.cpp b/Source/Core/VideoCommon/CommandProcessor.cpp
index 287d93d28f..32095d57b2 100644
--- a/Source/Core/VideoCommon/CommandProcessor.cpp
+++ b/Source/Core/VideoCommon/CommandProcessor.cpp
@@ -21,7 +21,7 @@
 
 namespace CommandProcessor
 {
-static int et_UpdateInterrupts;
+static CoreTiming::EventType* et_UpdateInterrupts;
 
 // TODO(ector): Warn on bbox read/write
 
diff --git a/Source/Core/VideoCommon/Fifo.cpp b/Source/Core/VideoCommon/Fifo.cpp
index 263d21193c..97cb8753e0 100644
--- a/Source/Core/VideoCommon/Fifo.cpp
+++ b/Source/Core/VideoCommon/Fifo.cpp
@@ -48,7 +48,7 @@ static u8* s_fifo_aux_read_ptr;
 static bool s_use_deterministic_gpu_thread;
 
 static u64 s_last_sync_gpu_tick;
-static int s_event_sync_gpu;
+static CoreTiming::EventType* s_event_sync_gpu;
 
 // STATE_TO_SAVE
 static u8* s_video_buffer;
diff --git a/Source/Core/VideoCommon/PixelEngine.cpp b/Source/Core/VideoCommon/PixelEngine.cpp
index f38eb71125..5271f11d9a 100644
--- a/Source/Core/VideoCommon/PixelEngine.cpp
+++ b/Source/Core/VideoCommon/PixelEngine.cpp
@@ -100,7 +100,7 @@ static bool s_event_raised;
 static bool s_signal_token_interrupt;
 static bool s_signal_finish_interrupt;
 
-static int et_SetTokenFinishOnMainThread;
+static CoreTiming::EventType* et_SetTokenFinishOnMainThread;
 
 enum
 {