diff --git a/include/battle.h b/include/battle.h
index 29cc79d36be3..b328b46bb254 100644
--- a/include/battle.h
+++ b/include/battle.h
@@ -479,7 +479,6 @@ struct MegaEvolutionData
     bool8 playerSelect;
     u8 triggerSpriteId;
     bool8 isWishMegaEvo;
-    bool32 didMegaEvo[PARTY_SIZE][2]; // For each party member and side.
 };
 
 struct Illusion
diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 1232775fd06e..eaa7bbde1a69 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -8840,7 +8840,6 @@ static void Cmd_various(void)
 
             gBattleMons[gActiveBattler].species = megaSpecies;
             PREPARE_SPECIES_BUFFER(gBattleTextBuff1, gBattleMons[gActiveBattler].species);
-            gBattleStruct->mega.didMegaEvo[gActiveBattler][GetBattlerSide(gActiveBattler)] = TRUE;
 
             BtlController_EmitSetMonData(BUFFER_A, REQUEST_SPECIES_BATTLE, gBitTable[gBattlerPartyIndexes[gActiveBattler]], sizeof(gBattleMons[gActiveBattler].species), &gBattleMons[gActiveBattler].species);
             MarkBattlerForControllerExec(gActiveBattler);
diff --git a/src/battle_util.c b/src/battle_util.c
index 0b0ab3a04080..94fb078dacba 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -2110,10 +2110,11 @@ u32 GetBattlerFriendshipScore(u8 battlerId)
     struct MegaEvolutionData *mega = &(((struct ChooseMoveStruct *)(&gBattleResources->bufferA[battlerId][4]))->mega);
     u8 side = GetBattlerSide(battlerId);
     struct Pokemon *party = (side == B_SIDE_PLAYER) ? gPlayerParty : gEnemyParty;
+    u16 species = GetMonData(&party[gBattlerPartyIndexes[battlerId]], MON_DATA_SPECIES);
 
     if (side != B_SIDE_PLAYER)
         return FRIENDSHIP_NONE;
-    else if (gBattleStruct->mega.didMegaEvo[battlerId][side]
+    else if (gBaseStats[species].flags & SPECIES_FLAG_MEGA_EVOLUTION
           || (gBattleTypeFlags & (BATTLE_TYPE_EREADER_TRAINER
                                 | BATTLE_TYPE_FRONTIER
                                 | BATTLE_TYPE_LINK