diff --git a/src/party_menu.c b/src/party_menu.c
index 5e79d74d45..9a74a466e1 100644
--- a/src/party_menu.c
+++ b/src/party_menu.c
@@ -6182,6 +6182,27 @@ bool32 TryItemUseFusionChange(u8 taskId, TaskFunc task)
     }
 }
 
+static void RestoreFusionMon(struct Pokemon *mon)
+{
+    s32 i;
+
+    for (i = 0; i < PARTY_SIZE; i++)
+    {
+        if (GetMonData(&gPlayerParty[i], MON_DATA_SPECIES, NULL) == SPECIES_NONE)
+            break;
+    }
+
+    if (i >= PARTY_SIZE)
+    {
+        CopyMonToPC(mon);
+    }
+    else
+    {
+        CopyMon(&gPlayerParty[i], mon, sizeof(*mon));
+        gPlayerPartyCount = i + 1;
+    }
+}
+
 static void Task_TryItemUseFusionChange(u8 taskId)
 {
     struct Pokemon *mon = &gPlayerParty[gTasks[taskId].firstFusionSlot];
@@ -6202,7 +6223,7 @@ static void Task_TryItemUseFusionChange(u8 taskId)
         else
         {
             mon2 = &gPokemonStoragePtr->fusions[gTasks[taskId].storageIndex];
-            GiveMonToPlayer(mon2);
+            RestoreFusionMon(mon2);
             ZeroMonData(&gPokemonStoragePtr->fusions[gTasks[taskId].storageIndex]);
         }
         targetSpecies = gTasks[taskId].tTargetSpecies;