diff --git a/src/battle_ai_main.c b/src/battle_ai_main.c
index 5460e31dee..6d7f4ed09d 100644
--- a/src/battle_ai_main.c
+++ b/src/battle_ai_main.c
@@ -2320,6 +2320,23 @@ static s32 AI_CheckBadMove(u32 battlerAtk, u32 battlerDef, u32 move, s32 score)
               || DoesPartnerHaveSameMoveEffect(BATTLE_PARTNER(battlerAtk), battlerDef, move, aiData->partnerMove))
                 ADJUST_SCORE(-9);
             break;
+        case EFFECT_COURT_CHANGE:
+            if (gSideStatuses[GetBattlerSide(FOE(battlerAtk))] & SIDE_STATUS_BAD_COURT)
+                ADJUST_SCORE(BAD_EFFECT);
+            if (gSideStatuses[GetBattlerSide(battlerAtk)] & SIDE_STATUS_GOOD_COURT)
+                ADJUST_SCORE(BAD_EFFECT);
+            if (AreAnyHazardsOnSide(GetBattlerSide(FOE(battlerAtk))) && CountUsablePartyMons(battlerAtk) != 0)
+                ADJUST_SCORE(WORST_EFFECT);
+            if (hasPartner)
+            {
+                if (IsHazardMove(aiData->partnerMove) // partner is going to set up hazards
+                  && AI_IsFaster(BATTLE_PARTNER(battlerAtk), battlerAtk, aiData->partnerMove, predictedMove, CONSIDER_PRIORITY)) // partner is going to set up before the Court Change
+                {
+                    ADJUST_SCORE(-10);
+                    break; // Don't use Defog if partner is going to set up hazards
+                }
+            }
+            break;
         case EFFECT_DEFOG:
             if (gSideStatuses[GetBattlerSide(battlerDef)] & (SIDE_STATUS_SCREEN_ANY | SIDE_STATUS_SAFEGUARD | SIDE_STATUS_MIST)
              || AreAnyHazardsOnSide(GetBattlerSide(battlerAtk)))
@@ -2880,7 +2897,6 @@ static s32 AI_CheckBadMove(u32 battlerAtk, u32 battlerDef, u32 move, s32 score)
                     ADJUST_SCORE(-10);
             }
             break;
-        case EFFECT_COURT_CHANGE:
         case EFFECT_TEATIME:
             if (DoesPartnerHaveSameMoveEffect(BATTLE_PARTNER(battlerAtk), battlerDef, move, aiData->partnerMove))
                 ADJUST_SCORE(-10);
@@ -4603,6 +4619,27 @@ static u32 AI_CalcMoveEffectScore(u32 battlerAtk, u32 battlerDef, u32 move)
         //if (CountUsablePartyMons(battlerDef) != 0)
             //ADJUST_SCORE(8);
         break;
+    case EFFECT_COURT_CHANGE:
+        if (gSideStatuses[GetBattlerSide(FOE(battlerAtk))] & SIDE_STATUS_GOOD_COURT)
+            ADJUST_SCORE(WEAK_EFFECT);
+        if (gSideStatuses[GetBattlerSide(battlerAtk)] & SIDE_STATUS_BAD_COURT)
+            ADJUST_SCORE(WEAK_EFFECT);
+
+        if (AreAnyHazardsOnSide(GetBattlerSide(battlerAtk)) && CountUsablePartyMons(battlerAtk) != 0)
+        {
+            ADJUST_SCORE(DECENT_EFFECT);
+        }
+
+        if (hasPartner)
+        {
+            if (IsHazardMove(aiData->partnerMove) // partner is going to set up hazards
+              && AI_IsFaster(BATTLE_PARTNER(battlerAtk), battlerAtk, aiData->partnerMove, predictedMove, CONSIDER_PRIORITY)) // partner is going to set up before the Court Change
+            {
+                ADJUST_SCORE(-10);
+                break;
+            }
+        }
+        break;
     case EFFECT_DEFOG:
         if ((AreAnyHazardsOnSide(GetBattlerSide(battlerAtk)) && CountUsablePartyMons(battlerAtk) != 0)
             || (gSideStatuses[GetBattlerSide(battlerDef)] & SIDE_STATUS_GOOD_FOG))
diff --git a/test/battle/move_effect/court_change.c b/test/battle/move_effect/court_change.c
index 56d38c165d..40a1fe4e86 100644
--- a/test/battle/move_effect/court_change.c
+++ b/test/battle/move_effect/court_change.c
@@ -217,3 +217,35 @@ DOUBLE_BATTLE_TEST("Court Change used by the player swaps G-Max Vine Lash, G-Max
         }
     }
 }
+
+AI_SINGLE_BATTLE_TEST("AI uses Court Change")
+{
+    u32 move;
+
+    PARAMETRIZE { move = MOVE_HEADBUTT; }
+    PARAMETRIZE { move = MOVE_REFLECT; }
+    PARAMETRIZE { move = MOVE_LIGHT_SCREEN; }
+    PARAMETRIZE { move = MOVE_SAFEGUARD; }
+    PARAMETRIZE { move = MOVE_SPIKES; }
+    PARAMETRIZE { move = MOVE_STEALTH_ROCK; }
+    PARAMETRIZE { move = MOVE_TOXIC_SPIKES; }
+    PARAMETRIZE { move = MOVE_TAILWIND; }
+    PARAMETRIZE { move = MOVE_STICKY_WEB; }
+    PARAMETRIZE { move = MOVE_MIST; }
+    PARAMETRIZE { move = MOVE_LUCKY_CHANT; }
+
+    GIVEN {
+        AI_FLAGS(AI_FLAG_CHECK_BAD_MOVE | AI_FLAG_CHECK_VIABILITY | AI_FLAG_TRY_TO_FAINT);
+        PLAYER(SPECIES_ZIGZAGOON) { Moves(move, MOVE_CELEBRATE); }
+        PLAYER(SPECIES_ZIGZAGOON) { Moves(move, MOVE_CELEBRATE); }
+        OPPONENT(SPECIES_ZIGZAGOON) { Moves(MOVE_COURT_CHANGE, MOVE_HEADBUTT); }
+        OPPONENT(SPECIES_ZIGZAGOON) { Moves(MOVE_COURT_CHANGE, MOVE_HEADBUTT); }
+    } WHEN {
+        TURN { MOVE(player, move); EXPECT_MOVE(opponent, MOVE_HEADBUTT); }
+        if (move == MOVE_HEADBUTT)
+            TURN { MOVE(player, MOVE_CELEBRATE); NOT_EXPECT_MOVE(opponent, MOVE_COURT_CHANGE); }
+        else
+            TURN { MOVE(player, MOVE_CELEBRATE); EXPECT_MOVE(opponent, MOVE_COURT_CHANGE); }
+    }
+}
+