diff --git a/include/battle_util.h b/include/battle_util.h
index 57327176a8..ed67d21c3f 100644
--- a/include/battle_util.h
+++ b/include/battle_util.h
@@ -297,7 +297,7 @@ bool32 TryClearIllusion(u32 battler, u32 caseID);
 u32 GetIllusionMonSpecies(u32 battler);
 struct Pokemon *GetIllusionMonPtr(u32 battler);
 void ClearIllusionMon(u32 battler);
-u32 GetIllusionMonPartyId(struct Pokemon *party, struct Pokemon *mon, struct Pokemon *partnerMon);
+u32 GetIllusionMonPartyId(struct Pokemon *party, struct Pokemon *mon, struct Pokemon *partnerMon, u32 battler);
 bool32 SetIllusionMon(struct Pokemon *mon, u32 battler);
 bool32 ShouldGetStatBadgeBoost(u16 flagId, u32 battler);
 u32 GetBattleMoveCategory(u32 move);
diff --git a/src/battle_message.c b/src/battle_message.c
index 78708d47d6..350cddd374 100644
--- a/src/battle_message.c
+++ b/src/battle_message.c
@@ -3187,7 +3187,7 @@ static void IllusionNickHack(u32 battler, u32 partyId, u8 *dst)
         else
             partnerMon = mon;
 
-        id = GetIllusionMonPartyId(gEnemyParty, mon, partnerMon);
+        id = GetIllusionMonPartyId(gEnemyParty, mon, partnerMon, battler);
     }
 
     if (id != PARTY_SIZE)
diff --git a/src/battle_util.c b/src/battle_util.c
index 4f0ffcf962..a544d1484d 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -10373,11 +10373,29 @@ u32 GetIllusionMonSpecies(u32 battler)
     return SPECIES_NONE;
 }
 
-u32 GetIllusionMonPartyId(struct Pokemon *party, struct Pokemon *mon, struct Pokemon *partnerMon)
+u32 GetIllusionMonPartyId(struct Pokemon *party, struct Pokemon *mon, struct Pokemon *partnerMon, u32 battler)
 {
-    s32 id;
+    s32 partyEnd=6;
+    s32 partyStart=0;
+
+    // Adjust party search range for Multibattles and Player vs two-trainers
+    if((GetBattlerSide(battler) == B_SIDE_PLAYER && (gBattleTypeFlags & BATTLE_TYPE_MULTI))
+        || (GetBattlerSide(battler) == B_SIDE_OPPONENT && (gBattleTypeFlags & BATTLE_TYPE_TWO_OPPONENTS)))
+        {
+            if((GetBattlerPosition(battler) == B_POSITION_PLAYER_LEFT) || (GetBattlerPosition(battler) == B_POSITION_OPPONENT_LEFT))
+            {
+                partyEnd = 3;
+                partyStart = 0;
+            }
+            else
+            {
+                partyEnd = 6;
+                partyStart = 3;
+            }
+        }
+
     // Find last alive non-egg pokemon.
-    for (id = PARTY_SIZE - 1; id >= 0; id--)
+    for (s32 id = partyEnd - 1; id >= partyStart; id--)
     {
         if (GetMonData(&party[id], MON_DATA_SANITY_HAS_SPECIES)
             && GetMonData(&party[id], MON_DATA_HP)
@@ -10411,7 +10429,7 @@ bool32 SetIllusionMon(struct Pokemon *mon, u32 battler)
     else
         partnerMon = mon;
 
-    id = GetIllusionMonPartyId(party, mon, partnerMon);
+    id = GetIllusionMonPartyId(party, mon, partnerMon, battler);
     if (id != PARTY_SIZE)
     {
         gBattleStruct->illusion[battler].state = ILLUSION_ON;