diff --git a/src/battle_controller_player_partner.c b/src/battle_controller_player_partner.c
index 9743e92e0..06a73beab 100644
--- a/src/battle_controller_player_partner.c
+++ b/src/battle_controller_player_partner.c
@@ -1526,7 +1526,10 @@ static void PlayerPartnerHandleChooseMove(void)
             gBattlerTarget = GetBattlerAtPosition(B_POSITION_OPPONENT_RIGHT);
     }
 
-    BtlController_EmitTwoReturnValues(1, 10, chosenMoveId | (gBattlerTarget << 8));
+    if (CanMegaEvolve(gActiveBattler)) // If partner can mega evolve, do it.
+        BtlController_EmitTwoReturnValues(1, 10, (chosenMoveId) | (RET_MEGA_EVOLUTION) | (gBattlerTarget << 8));
+    else
+        BtlController_EmitTwoReturnValues(1, 10, (chosenMoveId) | (gBattlerTarget << 8));
     PlayerPartnerBufferExecCompleted();
 }