diff --git a/include/battle_util.h b/include/battle_util.h
index fb74610d0c..d3b930feda 100644
--- a/include/battle_util.h
+++ b/include/battle_util.h
@@ -102,6 +102,7 @@ u32 IsAbilityOnOpposingSide(u32 battlerId, u32 ability);
 u32 IsAbilityOnField(u32 ability);
 u32 IsAbilityOnFieldExcept(u32 battlerId, u32 ability);
 u32 IsAbilityPreventingEscape(u32 battlerId);
+bool32 IsBattlerProtected(u8 battlerId, u16 move);
 bool32 CanBattlerEscape(u32 battlerId); // no ability check
 void BattleScriptExecute(const u8* BS_ptr);
 void BattleScriptPushCursorAndCallback(const u8* BS_ptr);
diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 3f9ba388f7..ccb2a26d1b 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -1313,47 +1313,6 @@ static const u8 sBattlePalaceNatureToFlavorTextId[NUM_NATURES] =
     [NATURE_QUIRKY]  = B_MSG_EAGER_FOR_MORE,
 };
 
-bool32 IsBattlerProtected(u8 battlerId, u16 move)
-{
-    // Decorate bypasses protect and detect, but not crafty shield
-    if (move == MOVE_DECORATE)
-    {
-        if (gSideStatuses[GetBattlerSide(battlerId)] & SIDE_STATUS_CRAFTY_SHIELD)
-            return TRUE;
-        else if (gProtectStructs[battlerId].protected)
-            return FALSE;
-    }
-    
-    if (!(gBattleMoves[move].flags & FLAG_PROTECT_AFFECTED))
-        return FALSE;
-    else if (gBattleMoves[move].effect == MOVE_EFFECT_FEINT)
-        return FALSE;
-    else if (gProtectStructs[battlerId].protected)
-        return TRUE;
-    else if (gSideStatuses[GetBattlerSide(battlerId)] & SIDE_STATUS_WIDE_GUARD
-             && gBattleMoves[move].target & (MOVE_TARGET_BOTH | MOVE_TARGET_FOES_AND_ALLY))
-        return TRUE;
-    else if (gProtectStructs[battlerId].banefulBunkered)
-        return TRUE;
-    else if (gProtectStructs[battlerId].obstructed && !IS_MOVE_STATUS(move))
-        return TRUE;
-    else if (gProtectStructs[battlerId].spikyShielded)
-        return TRUE;
-    else if (gProtectStructs[battlerId].kingsShielded && gBattleMoves[move].power != 0)
-        return TRUE;
-    else if (gSideStatuses[GetBattlerSide(battlerId)] & SIDE_STATUS_QUICK_GUARD
-             && GetChosenMovePriority(gBattlerAttacker) > 0)
-        return TRUE;
-    else if (gSideStatuses[GetBattlerSide(battlerId)] & SIDE_STATUS_CRAFTY_SHIELD
-      && IS_MOVE_STATUS(move))
-        return TRUE;
-    else if (gSideStatuses[GetBattlerSide(battlerId)] & SIDE_STATUS_MAT_BLOCK
-      && !IS_MOVE_STATUS(move))
-        return TRUE;
-    else
-        return FALSE;
-}
-
 static bool32 NoTargetPresent(u32 move)
 {
     if (!IsBattlerAlive(gBattlerTarget))
diff --git a/src/battle_util.c b/src/battle_util.c
index 18847b8cce..1f89a082e5 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -7450,6 +7450,48 @@ bool32 IsMoveMakingContact(u16 move, u8 battlerAtk)
     }
 }
 
+bool32 IsBattlerProtected(u8 battlerId, u16 move)
+{
+    // Decorate bypasses protect and detect, but not crafty shield
+    if (move == MOVE_DECORATE)
+    {
+        if (gSideStatuses[GetBattlerSide(battlerId)] & SIDE_STATUS_CRAFTY_SHIELD)
+            return TRUE;
+        else if (gProtectStructs[battlerId].protected)
+            return FALSE;
+    }
+    
+    if (!(gBattleMoves[move].flags & FLAG_PROTECT_AFFECTED))
+        return FALSE;
+    else if (gBattleMoves[move].effect == MOVE_EFFECT_FEINT)
+        return FALSE;
+    else if (gProtectStructs[battlerId].protected)
+        return TRUE;
+    else if (gSideStatuses[GetBattlerSide(battlerId)] & SIDE_STATUS_WIDE_GUARD
+             && gBattleMoves[move].target & (MOVE_TARGET_BOTH | MOVE_TARGET_FOES_AND_ALLY))
+        return TRUE;
+    else if (gProtectStructs[battlerId].banefulBunkered)
+        return TRUE;
+    else if (gProtectStructs[battlerId].obstructed && !IS_MOVE_STATUS(move))
+        return TRUE;
+    else if (gProtectStructs[battlerId].spikyShielded)
+        return TRUE;
+    else if (gProtectStructs[battlerId].kingsShielded && gBattleMoves[move].power != 0)
+        return TRUE;
+    else if (gSideStatuses[GetBattlerSide(battlerId)] & SIDE_STATUS_QUICK_GUARD
+             && GetChosenMovePriority(gBattlerAttacker) > 0)
+        return TRUE;
+    else if (gSideStatuses[GetBattlerSide(battlerId)] & SIDE_STATUS_CRAFTY_SHIELD
+      && IS_MOVE_STATUS(move))
+        return TRUE;
+    else if (gSideStatuses[GetBattlerSide(battlerId)] & SIDE_STATUS_MAT_BLOCK
+      && !IS_MOVE_STATUS(move))
+        return TRUE;
+    else
+        return FALSE;
+}
+
+
 bool32 IsBattlerGrounded(u8 battlerId)
 {
     if (GetBattlerHoldEffect(battlerId, TRUE) == HOLD_EFFECT_IRON_BALL)
@@ -8609,7 +8651,9 @@ static u32 CalcFinalDmg(u32 dmg, u16 move, u8 battlerAtk, u8 battlerDef, u8 move
     if (((gSideStatuses[defSide] & SIDE_STATUS_REFLECT && IS_MOVE_PHYSICAL(move))
             || (gSideStatuses[defSide] & SIDE_STATUS_LIGHTSCREEN && IS_MOVE_SPECIAL(move))
             || (gSideStatuses[defSide] & SIDE_STATUS_AURORA_VEIL))
-        && abilityAtk != ABILITY_INFILTRATOR)
+        && abilityAtk != ABILITY_INFILTRATOR
+        && !(isCrit)
+        && !gProtectStructs[gBattlerAttacker].confusionSelfDmg)
     {
         if (gBattleTypeFlags & BATTLE_TYPE_DOUBLE)
             MulModifier(&finalModifier, UQ_4_12(0.66));
@@ -8781,9 +8825,6 @@ static void MulByTypeEffectiveness(u16 *modifier, u16 move, u8 moveType, u8 batt
     if (moveType == TYPE_FIRE && gDisableStructs[battlerDef].tarShot)
         mod = UQ_4_12(2.0);
 
-    if (gProtectStructs[battlerDef].kingsShielded && gBattleMoves[move].effect != EFFECT_FEINT)
-        mod = UQ_4_12(1.0);
-
     // WEATHER_STRONG_WINDS weakens Super Effective moves against Flying-type Pokémon
     if (WEATHER_HAS_EFFECT && gBattleWeather & WEATHER_STRONG_WINDS)
     {