diff --git a/include/constants/battle_ai.h b/include/constants/battle_ai.h
index 5dbbccf489..1cfb9cd4dc 100644
--- a/include/constants/battle_ai.h
+++ b/include/constants/battle_ai.h
@@ -56,7 +56,7 @@
 #define AI_FLAG_STALL                 (1 << 13)  // AI stalls battle and prefers secondary damage/trapping/etc. TODO not finished
 #define AI_FLAG_SCREENER              (1 << 14)  // AI prefers screening effects like reflect, mist, etc. TODO unfinished
 #define AI_FLAG_SMART_SWITCHING       (1 << 15)  // AI includes a lot more switching checks
-#define AI_FLAG_ACE_POKEMON           (1 << 16)  // AI has Ace Pokemon. The last Pokemon in the party will not used until last remaining.
+#define AI_FLAG_ACE_POKEMON           (1 << 16)  // AI has an Ace Pokemon. The last Pokemon in the party will not be used until it's the last one remaining.
 
 // 'other' ai logic flags
 #define AI_FLAG_ROAMING               (1 << 29)
diff --git a/src/battle_ai_switch_items.c b/src/battle_ai_switch_items.c
index 7493be32b9..6f5de84c40 100644
--- a/src/battle_ai_switch_items.c
+++ b/src/battle_ai_switch_items.c
@@ -957,8 +957,8 @@ u8 GetMostSuitableMonToSwitchInto(void)
             || i == *(gBattleStruct->monToSwitchIntoId + battlerIn1)
             || i == *(gBattleStruct->monToSwitchIntoId + battlerIn2)
             || (GetMonAbility(&party[i]) == ABILITY_TRUANT && IsTruantMonVulnerable(gActiveBattler, opposingBattler)) // While not really invalid per say, not really wise to switch into this mon.
-            || (AI_THINKING_STRUCT->aiFlags & AI_FLAG_ACE_POKEMON 
-                && i == (CalculateEnemyPartyCount()-1))) //Save Ace Pokemon for last
+            || ((AI_THINKING_STRUCT->aiFlags & AI_FLAG_ACE_POKEMON)
+                && i == (CalculateEnemyPartyCount() - 1))) //Save Ace Pokemon for last
             invalidMons |= gBitTable[i];
         else
             aliveCount++;
diff --git a/src/battle_controller_opponent.c b/src/battle_controller_opponent.c
index 07cf95589f..5a307cfc9c 100644
--- a/src/battle_controller_opponent.c
+++ b/src/battle_controller_opponent.c
@@ -1699,9 +1699,9 @@ static void OpponentHandleChoosePokemon(void)
                 if (GetMonData(&gEnemyParty[chosenMonId], MON_DATA_HP) != 0
                     && chosenMonId != gBattlerPartyIndexes[battler1]
                     && chosenMonId != gBattlerPartyIndexes[battler2]
-                    && (AI_THINKING_STRUCT->aiFlags & AI_FLAG_ACE_POKEMON
-                        && (!(chosenMonId == (CalculateEnemyPartyCount()-1))
-                            || CountAIAliveNonEggMonsExcept(PARTY_SIZE) == pokemonInBattle)))
+                    && (!(AI_THINKING_STRUCT->aiFlags & AI_FLAG_ACE_POKEMON)
+                        || chosenMonId != CalculateEnemyPartyCount() - 1
+                        || CountAIAliveNonEggMonsExcept(PARTY_SIZE) == pokemonInBattle))
                 {
                     break;
                 }