diff --git a/include/constants/hold_effects.h b/include/constants/hold_effects.h
index bdf042d63..669d7c0b8 100644
--- a/include/constants/hold_effects.h
+++ b/include/constants/hold_effects.h
@@ -102,7 +102,7 @@
 #define HOLD_EFFECT_GRISEOUS_ORB   96
 #define HOLD_EFFECT_GRACIDEA       97
 #define HOLD_EFFECT_RESIST_BERRY   98
-#define HOLD_EFFECT_EV_BOOST       99
+#define HOLD_EFFECT_POWER_ITEM     99
 #define HOLD_EFFECT_RESTORE_PCT_HP 100
 
 // Gen5 hold effects
diff --git a/src/battle_main.c b/src/battle_main.c
index 17375b24c..3617978ef 100644
--- a/src/battle_main.c
+++ b/src/battle_main.c
@@ -4242,7 +4242,7 @@ u32 GetBattlerTotalSpeedStat(u8 battlerId)
     }
 
     // item effects
-    if (GetBattlerHoldEffect(battlerId, FALSE) == HOLD_EFFECT_MACHO_BRACE || GetBattlerHoldEffect(battlerId, FALSE) == HOLD_EFFECT_EV_BOOST)
+    if (GetBattlerHoldEffect(battlerId, FALSE) == HOLD_EFFECT_MACHO_BRACE || GetBattlerHoldEffect(battlerId, FALSE) == HOLD_EFFECT_POWER_ITEM)
         speed /= 2;
     else if (holdEffect == HOLD_EFFECT_IRON_BALL)
         speed /= 2;
diff --git a/src/pokemon.c b/src/pokemon.c
index e38befa4a..ed890c7df 100644
--- a/src/pokemon.c
+++ b/src/pokemon.c
@@ -5560,6 +5560,24 @@ void MonGainEVs(struct Pokemon *mon, u16 defeatedSpecies)
     u16 heldItem;
     u8 holdEffect;
     int i, multiplier;
+    u8 stat;
+    u8 bonus;
+
+    heldItem = GetMonData(mon, MON_DATA_HELD_ITEM, 0);
+    if (heldItem == ITEM_ENIGMA_BERRY)
+    {
+        if (gMain.inBattle)
+            holdEffect = gEnigmaBerries[0].holdEffect;
+        else
+            holdEffect = gSaveBlock1Ptr->enigmaBerry.holdEffect;
+    }
+    else
+    {
+        holdEffect = ItemId_GetHoldEffect(heldItem);
+    }
+
+    stat = ItemId_GetSecondaryId(heldItem);
+    bonus = ItemId_GetHoldEffectParam(heldItem);
 
     for (i = 0; i < NUM_STATS; i++)
     {
@@ -5580,36 +5598,41 @@ void MonGainEVs(struct Pokemon *mon, u16 defeatedSpecies)
         switch (i)
         {
         case STAT_HP:
-            evIncrease = gBaseStats[defeatedSpecies].evYield_HP * multiplier;
+            if (holdEffect == HOLD_EFFECT_POWER_ITEM && stat == STAT_HP)
+                evIncrease = (gBaseStats[defeatedSpecies].evYield_HP + bonus) * multiplier;
+            else
+                evIncrease = gBaseStats[defeatedSpecies].evYield_HP * multiplier;
             break;
         case STAT_ATK:
-            evIncrease = gBaseStats[defeatedSpecies].evYield_Attack * multiplier;
+            if (holdEffect == HOLD_EFFECT_POWER_ITEM && stat == STAT_ATK)
+                evIncrease = (gBaseStats[defeatedSpecies].evYield_Attack + bonus) * multiplier;
+            else
+                evIncrease = gBaseStats[defeatedSpecies].evYield_Attack * multiplier;
             break;
         case STAT_DEF:
-            evIncrease = gBaseStats[defeatedSpecies].evYield_Defense * multiplier;
+            if (holdEffect == HOLD_EFFECT_POWER_ITEM && stat == STAT_DEF)
+                evIncrease = (gBaseStats[defeatedSpecies].evYield_Defense + bonus) * multiplier;
+            else
+                evIncrease = gBaseStats[defeatedSpecies].evYield_Defense * multiplier;
             break;
         case STAT_SPEED:
-            evIncrease = gBaseStats[defeatedSpecies].evYield_Speed * multiplier;
+            if (holdEffect == HOLD_EFFECT_POWER_ITEM && stat == STAT_SPEED)
+                evIncrease = (gBaseStats[defeatedSpecies].evYield_Speed + bonus) * multiplier;
+            else
+                evIncrease = gBaseStats[defeatedSpecies].evYield_Speed * multiplier;
             break;
         case STAT_SPATK:
-            evIncrease = gBaseStats[defeatedSpecies].evYield_SpAttack * multiplier;
+            if (holdEffect == HOLD_EFFECT_POWER_ITEM && stat == STAT_SPATK)
+                evIncrease = (gBaseStats[defeatedSpecies].evYield_SpAttack + bonus) * multiplier;
+            else
+                evIncrease = gBaseStats[defeatedSpecies].evYield_SpAttack * multiplier;
             break;
         case STAT_SPDEF:
-            evIncrease = gBaseStats[defeatedSpecies].evYield_SpDefense * multiplier;
-            break;
-        }
-
-        heldItem = GetMonData(mon, MON_DATA_HELD_ITEM, 0);
-        if (heldItem == ITEM_ENIGMA_BERRY)
-        {
-            if (gMain.inBattle)
-                holdEffect = gEnigmaBerries[0].holdEffect;
+            if (holdEffect == HOLD_EFFECT_POWER_ITEM && stat == STAT_SPDEF)
+                evIncrease = (gBaseStats[defeatedSpecies].evYield_SpDefense + bonus) * multiplier;
             else
-                holdEffect = gSaveBlock1Ptr->enigmaBerry.holdEffect;
-        }
-        else
-        {
-            holdEffect = ItemId_GetHoldEffect(heldItem);
+                evIncrease = gBaseStats[defeatedSpecies].evYield_SpDefense * multiplier;
+            break;
         }
 
         if (holdEffect == HOLD_EFFECT_MACHO_BRACE)