diff --git a/data/battle_scripts_1.s b/data/battle_scripts_1.s
index 825ed3703e..027c344b2d 100644
--- a/data/battle_scripts_1.s
+++ b/data/battle_scripts_1.s
@@ -4159,6 +4159,7 @@ BattleScript_EffectMinimize::
 BattleScript_EffectCurse::
 	jumpiftype BS_ATTACKER, TYPE_GHOST, BattleScript_GhostCurse
 	attackcanceler
+	jumpiftype BS_ATTACKER, TYPE_GHOST, BattleScript_DoGhostCurse
 	attackstring
 	ppreduce
 	jumpifstat BS_ATTACKER, CMP_GREATER_THAN, STAT_SPEED, MIN_STAT_STAGE, BattleScript_CurseTrySpeed
diff --git a/test/battle/move_effect/curse.c b/test/battle/move_effect/curse.c
index 5fe17d3561..0696dfc4ca 100644
--- a/test/battle/move_effect/curse.c
+++ b/test/battle/move_effect/curse.c
@@ -34,3 +34,36 @@ SINGLE_BATTLE_TEST("Curse cuts the user's HP in half when used by Ghost-types")
         HP_BAR(player, hp: maxHP / 2);
     }
 }
+
+SINGLE_BATTLE_TEST("Curse applies to the user if used with Protean")
+{
+    GIVEN {
+        PLAYER(SPECIES_KECLEON) { Ability(ABILITY_PROTEAN); }
+        OPPONENT(SPECIES_WOBBUFFET);
+    } WHEN {
+        TURN { MOVE(player, MOVE_CURSE, target: player); }
+    } SCENE {
+        s32 playerMaxHP = GetMonData(&PLAYER_PARTY[0], MON_DATA_MAX_HP);
+        ABILITY_POPUP(player, ABILITY_PROTEAN);
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_CURSE, player);
+        HP_BAR(player, damage: playerMaxHP / 2);
+        HP_BAR(player, damage: playerMaxHP / 4);
+    }
+}
+
+SINGLE_BATTLE_TEST("Curse applies to the opponent if user is afflicted by Trick-or-Treat in the same turn")
+{
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_WOBBUFFET);
+    } WHEN {
+        TURN { MOVE(opponent, MOVE_TRICK_OR_TREAT); MOVE(player, MOVE_CURSE, target: player); }
+    } SCENE {
+        s32 playerMaxHP = GetMonData(&PLAYER_PARTY[0], MON_DATA_MAX_HP);
+        s32 opponentMaxHP = GetMonData(&OPPONENT_PARTY[0], MON_DATA_MAX_HP);
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_TRICK_OR_TREAT, opponent);
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_CURSE, player);
+        HP_BAR(player, damage: playerMaxHP / 2);
+        HP_BAR(opponent, damage: opponentMaxHP / 4);
+    }
+}