diff --git a/include/battle.h b/include/battle.h
index 81123bd5c5..22b60d6e4f 100644
--- a/include/battle.h
+++ b/include/battle.h
@@ -211,6 +211,7 @@ struct SideTimer
     u8 tailwindBattlerId;
     u8 luckyChantTimer;
     u8 luckyChantBattlerId;
+    u8 retaliateTimer;
 };
 
 struct FieldTimer
diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 2c0614ada5..bfd4cc21a2 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -3505,12 +3505,14 @@ static void Cmd_tryfaintmon(void)
                 if (gBattleResults.playerFaintCounter < 0xFF)
                     gBattleResults.playerFaintCounter++;
                 AdjustFriendshipOnBattleFaint(gActiveBattler);
+                gSideTimers[0].retaliateTimer = 2;
             }
             else
             {
                 if (gBattleResults.opponentFaintCounter < 0xFF)
                     gBattleResults.opponentFaintCounter++;
                 gBattleResults.lastOpponentSpecies = GetMonData(&gEnemyParty[gBattlerPartyIndexes[gActiveBattler]], MON_DATA_SPECIES, NULL);
+                gSideTimers[1].retaliateTimer = 2;
             }
             if ((gHitMarker & HITMARKER_DESTINYBOND) && gBattleMons[gBattlerAttacker].hp != 0)
             {
diff --git a/src/battle_util.c b/src/battle_util.c
index 506eebddf8..e01c89fca9 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -1898,6 +1898,7 @@ enum
     ENDTURN_PSYCHIC_TERRAIN,
     ENDTURN_ION_DELUGE,
     ENDTURN_FAIRY_LOCK,
+    ENDTURN_RETALIATE,
     ENDTURN_FIELD_COUNT,
 };
 
@@ -2329,6 +2330,12 @@ u8 DoFieldEndTurnEffects(void)
             }
             gBattleStruct->turnCountersTracker++;
             break;
+        case ENDTURN_RETALIATE:
+            gActiveBattler = gBattlerByTurnOrder[gBattleStruct->turnSideTracker];
+            if (gSideTimers[GET_BATTLER_SIDE(gActiveBattler)].retaliateTimer > 0)
+                gSideTimers[GET_BATTLER_SIDE(gActiveBattler)].retaliateTimer--;
+            gBattleStruct->turnCountersTracker++;
+            break;
         case ENDTURN_FIELD_COUNT:
             effect++;
             break;
@@ -7709,6 +7716,7 @@ static u32 CalcMoveBasePowerAfterModifiers(u16 move, u8 battlerAtk, u8 battlerDe
     u16 basePower = CalcMoveBasePower(move, battlerAtk, battlerDef);
     u16 holdEffectModifier;
     u16 modifier = UQ_4_12(1.0);
+    u32 atkSide = GET_BATTLER_SIDE(battlerAtk);
 
     // attacker's abilities
     switch (GetBattlerAbility(battlerAtk))
@@ -7961,7 +7969,8 @@ static u32 CalcMoveBasePowerAfterModifiers(u16 move, u8 battlerAtk, u8 battlerDe
             MulModifier(&modifier, UQ_4_12(2.0));
         break;
     case EFFECT_RETALIATE:
-        // todo
+        if (gSideTimers[atkSide].retaliateTimer == 1)
+            MulModifier(&modifier, UQ_4_12(2.0));
         break;
     case EFFECT_SOLARBEAM:
         if (WEATHER_HAS_EFFECT && gBattleWeather & (WEATHER_HAIL_ANY | WEATHER_SANDSTORM_ANY | WEATHER_RAIN_ANY))