diff --git a/include/battle.h b/include/battle.h
index d0d8f4d8fb..d59623410d 100644
--- a/include/battle.h
+++ b/include/battle.h
@@ -547,6 +547,7 @@ struct BattleStruct
     u8 soulheartBattlerId;
     u8 friskedBattler; // Frisk needs to identify 2 battlers in double battles.
     bool8 friskedAbility; // If identifies two mons, show the ability pop-up only once.
+    u8 sameMoveTurns[MAX_BATTLERS_COUNT]; // For Metronome, number of times the same moves has been SUCCESFULLY used.
 };
 
 #define GET_MOVE_TYPE(move, typeArg)                        \
diff --git a/src/battle_main.c b/src/battle_main.c
index f200a3b548..5716950951 100644
--- a/src/battle_main.c
+++ b/src/battle_main.c
@@ -3045,6 +3045,7 @@ void SwitchInClearSetData(void)
     gLastHitBy[gActiveBattler] = 0xFF;
 
     gBattleStruct->lastTakenMove[gActiveBattler] = 0;
+    gBattleStruct->sameMoveTurns[gActiveBattler] = 0;
     gBattleStruct->lastTakenMoveFrom[gActiveBattler][0] = 0;
     gBattleStruct->lastTakenMoveFrom[gActiveBattler][1] = 0;
     gBattleStruct->lastTakenMoveFrom[gActiveBattler][2] = 0;
@@ -3130,6 +3131,7 @@ void FaintClearSetData(void)
     gLastHitBy[gActiveBattler] = 0xFF;
 
     gBattleStruct->choicedMove[gActiveBattler] = 0;
+    gBattleStruct->sameMoveTurns[gActiveBattler] = 0;
     gBattleStruct->lastTakenMove[gActiveBattler] = 0;
     gBattleStruct->lastTakenMoveFrom[gActiveBattler][0] = 0;
     gBattleStruct->lastTakenMoveFrom[gActiveBattler][1] = 0;
diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 4e30a3d4d4..a78d4497c6 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -1447,6 +1447,13 @@ static void Cmd_ppreduce(void)
     if (!(gHitMarker & (HITMARKER_NO_PPDEDUCT | HITMARKER_NO_ATTACKSTRING)) && gBattleMons[gBattlerAttacker].pp[gCurrMovePos])
     {
         gProtectStructs[gBattlerAttacker].notFirstStrike = 1;
+        // For item Metronome
+        if (gCurrentMove == gLastResultingMoves[gBattlerAttacker]
+            && !(gMoveResultFlags & MOVE_RESULT_NO_EFFECT)
+            && !WasUnableToUseMove(gBattlerAttacker))
+                gBattleStruct->sameMoveTurns[gBattlerAttacker]++;
+        else
+            gBattleStruct->sameMoveTurns[gBattlerAttacker] = 0;
 
         if (gBattleMons[gBattlerAttacker].pp[gCurrMovePos] > ppToDeduct)
             gBattleMons[gBattlerAttacker].pp[gCurrMovePos] -= ppToDeduct;
@@ -4806,7 +4813,7 @@ static void Cmd_moveend(void)
             }
             gBattleScripting.moveendState++;
             break;
-        case MOVEEND_CLEAR_BITS: // Clear bits active while using a move for all targets and all hits.
+        case MOVEEND_CLEAR_BITS: // Clear/Set bits for things like using a move for all targets and all hits.
             if (gSpecialStatuses[gBattlerAttacker].instructedChosenTarget)
                 *(gBattleStruct->moveTarget + gBattlerAttacker) = gSpecialStatuses[gBattlerAttacker].instructedChosenTarget & 0x3;
             if (gSpecialStatuses[gBattlerAttacker].dancerOriginalTarget)
diff --git a/src/battle_util.c b/src/battle_util.c
index e857fb8bf9..daf0e08f16 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -6131,6 +6131,7 @@ static u32 CalcDefenseStat(u16 move, u8 battlerAtk, u8 battlerDef, u8 moveType,
 
 static u32 CalcFinalDmg(u32 dmg, u16 move, u8 battlerAtk, u8 battlerDef, u8 moveType, u16 typeEffectivenessModifier, bool32 isCrit, bool32 updateFlags)
 {
+    u32 percentBoost;
     u32 abilityAtk = GetBattlerAbility(battlerAtk);
     u32 abilityDef = GetBattlerAbility(battlerDef);
     u32 defSide = GET_BATTLER_SIDE(battlerDef);
@@ -6237,7 +6238,8 @@ static u32 CalcFinalDmg(u32 dmg, u16 move, u8 battlerAtk, u8 battlerDef, u8 move
     switch (GetBattlerHoldEffect(battlerAtk, TRUE))
     {
     case HOLD_EFFECT_METRONOME:
-        // todo
+        percentBoost = min((gBattleStruct->sameMoveTurns[battlerAtk] * GetBattlerHoldEffectParam(battlerAtk)), 100);
+        MulModifier(&finalModifier, UQ_4_12(1.0) + sPercentToModifier[percentBoost]);
         break;
     case HOLD_EFFECT_EXPERT_BELT:
         if (typeEffectivenessModifier >= UQ_4_12(2.0))