diff --git a/asm/pokenav.s b/asm/pokenav.s
index 4851cd221..cfad3feda 100644
--- a/asm/pokenav.s
+++ b/asm/pokenav.s
@@ -28079,8 +28079,8 @@ sub_81D5520: @ 81D5520
 	.pool
 	thumb_func_end sub_81D5520
 
-	thumb_func_start sub_81D5530
-sub_81D5530: @ 81D5530
+	thumb_func_start GetTrainerHillOpponentClass
+GetTrainerHillOpponentClass: @ 81D5530
 	lsls r0, 24
 	movs r1, 0xFF
 	lsls r1, 24
@@ -28096,10 +28096,10 @@ sub_81D5530: @ 81D5530
 	ldrb r0, [r0]
 	bx lr
 	.pool
-	thumb_func_end sub_81D5530
+	thumb_func_end GetTrainerHillOpponentClass
 
-	thumb_func_start sub_81D5554
-sub_81D5554: @ 81D5554
+	thumb_func_start GetTrainerHillTrainerName
+GetTrainerHillTrainerName: @ 81D5554
 	push {r4,lr}
 	adds r4, r0, 0
 	lsls r1, 24
@@ -28125,10 +28125,10 @@ _081D556E:
 	pop {r0}
 	bx r0
 	.pool
-	thumb_func_end sub_81D5554
+	thumb_func_end GetTrainerHillTrainerName
 
-	thumb_func_start sub_81D5588
-sub_81D5588: @ 81D5588
+	thumb_func_start GetTrainerHillTrainerFrontSpriteId
+GetTrainerHillTrainerFrontSpriteId: @ 81D5588
 	push {r4,lr}
 	adds r4, r0, 0
 	lsls r4, 16
@@ -28160,7 +28160,7 @@ sub_81D5588: @ 81D5588
 	pop {r1}
 	bx r1
 	.pool
-	thumb_func_end sub_81D5588
+	thumb_func_end GetTrainerHillTrainerFrontSpriteId
 
 	thumb_func_start sub_81D55D0
 sub_81D55D0: @ 81D55D0
@@ -28324,8 +28324,8 @@ _081D5722:
 	.pool
 	thumb_func_end sub_81D5710
 
-	thumb_func_start sub_81D572C
-sub_81D572C: @ 81D572C
+	thumb_func_start CopyTrainerHillTrainerText
+CopyTrainerHillTrainerText: @ 81D572C
 	push {r4-r6,lr}
 	adds r4, r1, 0
 	lsls r0, 24
@@ -28441,7 +28441,7 @@ _081D580E:
 	pop {r0}
 	bx r0
 	.pool
-	thumb_func_end sub_81D572C
+	thumb_func_end CopyTrainerHillTrainerText
 
 	thumb_func_start sub_81D581C
 sub_81D581C: @ 81D581C
@@ -29704,7 +29704,7 @@ sub_81D62B4: @ 81D62B4
 	ldr r0, =gSpecialVar_LastTalked
 	ldrh r1, [r0]
 	movs r0, 0x5
-	bl sub_81D572C
+	bl CopyTrainerHillTrainerText
 	bl sub_80982B8
 	pop {r0}
 	bx r0
diff --git a/data/battle_scripts_1.s b/data/battle_scripts_1.s
index fec030bb5..0c5e172b0 100644
--- a/data/battle_scripts_1.s
+++ b/data/battle_scripts_1.s
@@ -2968,7 +2968,7 @@ BattleScript_PayDayMoneyAndPickUpItems::
 BattleScript_LocalBattleLost::
 	jumpifbattletype BATTLE_TYPE_DOME, BattleScript_CheckDomeDrew
 	jumpifbattletype BATTLE_TYPE_FRONTIER, BattleScript_LocalBattleLostPrintTrainersWinText
-	jumpifbattletype BATTLE_TYPE_x4000000, BattleScript_LocalBattleLostPrintTrainersWinText
+	jumpifbattletype BATTLE_TYPE_TRAINER_HILL, BattleScript_LocalBattleLostPrintTrainersWinText
 	jumpifbattletype BATTLE_TYPE_EREADER_TRAINER, BattleScript_LocalBattleLostEnd
 	jumpifhalfword CMP_EQUAL, gTrainerBattleOpponent_A, 0x400, BattleScript_LocalBattleLostEnd
 BattleScript_LocalBattleLostPrintWhiteOut::
diff --git a/include/constants/battle.h b/include/constants/battle.h
index 34f18c7bc..25544ba3d 100644
--- a/include/constants/battle.h
+++ b/include/constants/battle.h
@@ -70,7 +70,7 @@
 #define BATTLE_TYPE_x800000         0x800000
 #define BATTLE_TYPE_RECORDED        0x1000000
 #define BATTLE_TYPE_x2000000        0x2000000
-#define BATTLE_TYPE_x4000000        0x4000000
+#define BATTLE_TYPE_TRAINER_HILL    0x4000000
 #define BATTLE_TYPE_SECRET_BASE     0x8000000
 #define BATTLE_TYPE_GROUDON         0x10000000
 #define BATTLE_TYPE_KYOGRE          0x20000000
diff --git a/src/battle_ai_script_commands.c b/src/battle_ai_script_commands.c
index 74247f8a2..1201a855a 100644
--- a/src/battle_ai_script_commands.c
+++ b/src/battle_ai_script_commands.c
@@ -369,7 +369,7 @@ void BattleAI_SetupAIData(u8 defaultScoreMoves)
         AI_THINKING_STRUCT->aiFlags = AI_SCRIPT_FIRST_BATTLE;
     else if (gBattleTypeFlags & BATTLE_TYPE_FACTORY)
         AI_THINKING_STRUCT->aiFlags = GetAiScriptsInBattleFactory();
-    else if (gBattleTypeFlags & (BATTLE_TYPE_FRONTIER | BATTLE_TYPE_EREADER_TRAINER | BATTLE_TYPE_x4000000 | BATTLE_TYPE_SECRET_BASE))
+    else if (gBattleTypeFlags & (BATTLE_TYPE_FRONTIER | BATTLE_TYPE_EREADER_TRAINER | BATTLE_TYPE_TRAINER_HILL | BATTLE_TYPE_SECRET_BASE))
         AI_THINKING_STRUCT->aiFlags = AI_SCRIPT_CHECK_BAD_MOVE | AI_SCRIPT_CHECK_VIABILITY | AI_SCRIPT_TRY_TO_FAINT;
     else if (gBattleTypeFlags & BATTLE_TYPE_TWO_OPPONENTS)
         AI_THINKING_STRUCT->aiFlags = gTrainers[gTrainerBattleOpponent_A].aiFlags | gTrainers[gTrainerBattleOpponent_B].aiFlags;
diff --git a/src/battle_controller_opponent.c b/src/battle_controller_opponent.c
index 1cd672260..c490ad314 100644
--- a/src/battle_controller_opponent.c
+++ b/src/battle_controller_opponent.c
@@ -40,7 +40,7 @@ extern const struct CompressedSpritePalette gTrainerFrontPicPaletteTable[];
 extern void sub_8172EF0(u8 battlerId, struct Pokemon *mon);
 extern void sub_81A57E4(u8 battlerId, u16 stringId);
 extern u8 GetFrontierBrainTrainerPicIndex(void);
-extern u8 sub_81D5588(u16 trainerId);
+extern u8 GetTrainerHillTrainerFrontSpriteId(u16 trainerId);
 extern u8 GetFrontierTrainerFrontSpriteId(u16 trainerId);
 extern u8 GetEreaderTrainerFrontSpriteId(void);
 
@@ -1236,18 +1236,18 @@ static void OpponentHandleDrawTrainerPic(void)
     {
         trainerPicId = GetFrontierBrainTrainerPicIndex();
     }
-    else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+    else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
     {
         if (gBattleTypeFlags & BATTLE_TYPE_TWO_OPPONENTS)
         {
             if (gActiveBattler == 1)
-                trainerPicId = sub_81D5588(gTrainerBattleOpponent_A);
+                trainerPicId = GetTrainerHillTrainerFrontSpriteId(gTrainerBattleOpponent_A);
             else
-                trainerPicId = sub_81D5588(gTrainerBattleOpponent_B);
+                trainerPicId = GetTrainerHillTrainerFrontSpriteId(gTrainerBattleOpponent_B);
         }
         else
         {
-            trainerPicId = sub_81D5588(gTrainerBattleOpponent_A);
+            trainerPicId = GetTrainerHillTrainerFrontSpriteId(gTrainerBattleOpponent_A);
         }
     }
     else if (gBattleTypeFlags & BATTLE_TYPE_FRONTIER)
@@ -1320,18 +1320,18 @@ static void OpponentHandleTrainerSlide(void)
     {
         trainerPicId = GetFrontierBrainTrainerPicIndex();
     }
-    else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+    else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
     {
         if (gBattleTypeFlags & BATTLE_TYPE_TWO_OPPONENTS)
         {
             if (gActiveBattler == 1)
-                trainerPicId = sub_81D5588(gTrainerBattleOpponent_A);
+                trainerPicId = GetTrainerHillTrainerFrontSpriteId(gTrainerBattleOpponent_A);
             else
-                trainerPicId = sub_81D5588(gTrainerBattleOpponent_B);
+                trainerPicId = GetTrainerHillTrainerFrontSpriteId(gTrainerBattleOpponent_B);
         }
         else
         {
-            trainerPicId = sub_81D5588(gTrainerBattleOpponent_A);
+            trainerPicId = GetTrainerHillTrainerFrontSpriteId(gTrainerBattleOpponent_A);
         }
     }
     else if (gBattleTypeFlags & BATTLE_TYPE_FRONTIER)
diff --git a/src/battle_main.c b/src/battle_main.c
index 74325d7bf..12e49ee65 100644
--- a/src/battle_main.c
+++ b/src/battle_main.c
@@ -1920,7 +1920,7 @@ static u8 CreateNPCTrainerParty(struct Pokemon *party, u16 trainerNum, bool8 fir
 
     if (gBattleTypeFlags & BATTLE_TYPE_TRAINER && !(gBattleTypeFlags & (BATTLE_TYPE_FRONTIER
                                                                         | BATTLE_TYPE_EREADER_TRAINER
-                                                                        | BATTLE_TYPE_x4000000)))
+                                                                        | BATTLE_TYPE_TRAINER_HILL)))
     {
         if (firstTrainer == TRUE)
             ZeroEnemyPartyMons();
@@ -3385,7 +3385,7 @@ static void BattleIntroDrawTrainersOrMonsSprites(void)
                                       | BATTLE_TYPE_FRONTIER
                                       | BATTLE_TYPE_LINK
                                       | BATTLE_TYPE_x2000000
-                                      | BATTLE_TYPE_x4000000)))
+                                      | BATTLE_TYPE_TRAINER_HILL)))
             {
                 HandleSetPokedexFlag(SpeciesToNationalPokedexNum(gBattleMons[gActiveBattler].species), FLAG_SET_SEEN, gBattleMons[gActiveBattler].personality);
             }
@@ -3398,7 +3398,7 @@ static void BattleIntroDrawTrainersOrMonsSprites(void)
                                       | BATTLE_TYPE_FRONTIER
                                       | BATTLE_TYPE_LINK
                                       | BATTLE_TYPE_x2000000
-                                      | BATTLE_TYPE_x4000000)))
+                                      | BATTLE_TYPE_TRAINER_HILL)))
                 {
                     HandleSetPokedexFlag(SpeciesToNationalPokedexNum(gBattleMons[gActiveBattler].species), FLAG_SET_SEEN, gBattleMons[gActiveBattler].personality);
                 }
@@ -3709,7 +3709,7 @@ static void BattleIntroRecordMonsToDex(void)
                                       | BATTLE_TYPE_FRONTIER
                                       | BATTLE_TYPE_LINK
                                       | BATTLE_TYPE_x2000000
-                                      | BATTLE_TYPE_x4000000)))
+                                      | BATTLE_TYPE_TRAINER_HILL)))
             {
                 HandleSetPokedexFlag(SpeciesToNationalPokedexNum(gBattleMons[gActiveBattler].species), FLAG_SET_SEEN, gBattleMons[gActiveBattler].personality);
             }
@@ -4326,7 +4326,7 @@ static void HandleTurnActionSelectionState(void)
                 }
 
                 if (gBattleTypeFlags & BATTLE_TYPE_TRAINER
-                    && gBattleTypeFlags & (BATTLE_TYPE_FRONTIER | BATTLE_TYPE_x4000000)
+                    && gBattleTypeFlags & (BATTLE_TYPE_FRONTIER | BATTLE_TYPE_TRAINER_HILL)
                     && gBattleBufferB[gActiveBattler][1] == B_ACTION_RUN)
                 {
                     gSelectionBattleScripts[gActiveBattler] = BattleScript_AskIfWantsToForfeitMatch;
@@ -4978,7 +4978,7 @@ static void HandleEndTurn_BattleWon(void)
         gBattleOutcome &= ~(B_OUTCOME_LINK_BATTLE_RAN);
     }
     else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER
-            && gBattleTypeFlags & (BATTLE_TYPE_FRONTIER | BATTLE_TYPE_x4000000 | BATTLE_TYPE_EREADER_TRAINER))
+            && gBattleTypeFlags & (BATTLE_TYPE_FRONTIER | BATTLE_TYPE_TRAINER_HILL | BATTLE_TYPE_EREADER_TRAINER))
     {
         BattleStopLowHpSound();
         gBattlescriptCurrInstr = BattleScript_FrontierTrainerBattleWon;
@@ -5069,7 +5069,7 @@ static void HandleEndTurn_RanFromBattle(void)
         gBattleOutcome = B_OUTCOME_FORFEITED;
         gSaveBlock2Ptr->frontier.field_CA9_b = 1;
     }
-    else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+    else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
     {
         gBattlescriptCurrInstr = BattleScript_PrintPlayerForfeited;
         gBattleOutcome = B_OUTCOME_FORFEITED;
@@ -5624,7 +5624,7 @@ bool8 TryRunFromBattle(u8 battler)
             effect++;
         }
     }
-    else if (gBattleTypeFlags & (BATTLE_TYPE_FRONTIER | BATTLE_TYPE_x4000000) && gBattleTypeFlags & BATTLE_TYPE_TRAINER)
+    else if (gBattleTypeFlags & (BATTLE_TYPE_FRONTIER | BATTLE_TYPE_TRAINER_HILL) && gBattleTypeFlags & BATTLE_TYPE_TRAINER)
     {
         effect++;
     }
diff --git a/src/battle_message.c b/src/battle_message.c
index 47579d4f2..a5f549733 100644
--- a/src/battle_message.c
+++ b/src/battle_message.c
@@ -47,12 +47,12 @@ extern const u8 gText_PkmnTransferredLanettesPC[];
 
 extern u8 GetFrontierBrainTrainerClass(void); // battle_frontier_2
 extern u8 GetFrontierOpponentClass(u16 trainerId); // battle_tower
-extern u8 sub_81D5530(u16 trainerId); // pokenav
+extern u8 GetTrainerHillOpponentClass(u16 trainerId); // pokenav
 extern u8 GetEreaderTrainerClassId(void); // battle_tower
 extern void CopyFrontierBrainTrainerName(u8 *txtPtr); // battle_frontier_2
-extern void sub_81D5554(u8 *txtPtr, u16 trainerId); // pokenav
+extern void GetTrainerHillTrainerName(u8 *txtPtr, u16 trainerId); // pokenav
 extern void GetEreaderTrainerName(u8 *txtPtr);
-extern void sub_81D572C(u8 arg0, u16 trainerId); // pokenav
+extern void CopyTrainerHillTrainerText(u8 arg0, u16 trainerId); // pokenav
 extern void GetFrontierTrainerName(u8 *dst, u16 trainerId);
 
 // this file's functions
@@ -2513,8 +2513,8 @@ u32 BattleStringExpandPlaceholders(const u8 *src, u8 *dst)
                     toCpy = gTrainerClassNames[GetFrontierBrainTrainerClass()];
                 else if (gBattleTypeFlags & BATTLE_TYPE_FRONTIER)
                     toCpy = gTrainerClassNames[GetFrontierOpponentClass(gTrainerBattleOpponent_A)];
-                else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
-                    toCpy = gTrainerClassNames[sub_81D5530(gTrainerBattleOpponent_A)];
+                else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
+                    toCpy = gTrainerClassNames[GetTrainerHillOpponentClass(gTrainerBattleOpponent_A)];
                 else if (gBattleTypeFlags & BATTLE_TYPE_EREADER_TRAINER)
                     toCpy = gTrainerClassNames[GetEreaderTrainerClassId()];
                 else
@@ -2543,9 +2543,9 @@ u32 BattleStringExpandPlaceholders(const u8 *src, u8 *dst)
                     GetFrontierTrainerName(text, gTrainerBattleOpponent_A);
                     toCpy = text;
                 }
-                else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+                else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
                 {
-                    sub_81D5554(text, gTrainerBattleOpponent_A);
+                    GetTrainerHillTrainerName(text, gTrainerBattleOpponent_A);
                     toCpy = text;
                 }
                 else if (gBattleTypeFlags & BATTLE_TYPE_EREADER_TRAINER)
@@ -2585,9 +2585,9 @@ u32 BattleStringExpandPlaceholders(const u8 *src, u8 *dst)
                     CopyFrontierTrainerText(FRONTIER_LOSE_TEXT, gTrainerBattleOpponent_A);
                     toCpy = gStringVar4;
                 }
-                else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+                else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
                 {
-                    sub_81D572C(4, gTrainerBattleOpponent_A);
+                    CopyTrainerHillTrainerText(4, gTrainerBattleOpponent_A);
                     toCpy = gStringVar4;
                 }
                 else
@@ -2601,9 +2601,9 @@ u32 BattleStringExpandPlaceholders(const u8 *src, u8 *dst)
                     CopyFrontierTrainerText(FRONTIER_WIN_TEXT, gTrainerBattleOpponent_A);
                     toCpy = gStringVar4;
                 }
-                else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+                else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
                 {
-                    sub_81D572C(3, gTrainerBattleOpponent_A);
+                    CopyTrainerHillTrainerText(3, gTrainerBattleOpponent_A);
                     toCpy = gStringVar4;
                 }
                 break;
@@ -2655,8 +2655,8 @@ u32 BattleStringExpandPlaceholders(const u8 *src, u8 *dst)
             case B_TXT_TRAINER2_CLASS:
                 if (gBattleTypeFlags & BATTLE_TYPE_FRONTIER)
                     toCpy = gTrainerClassNames[GetFrontierOpponentClass(gTrainerBattleOpponent_B)];
-                else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
-                    toCpy = gTrainerClassNames[sub_81D5530(gTrainerBattleOpponent_B)];
+                else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
+                    toCpy = gTrainerClassNames[GetTrainerHillOpponentClass(gTrainerBattleOpponent_B)];
                 else
                     toCpy = gTrainerClassNames[gTrainers[gTrainerBattleOpponent_B].trainerClass];
                 break;
@@ -2666,9 +2666,9 @@ u32 BattleStringExpandPlaceholders(const u8 *src, u8 *dst)
                     GetFrontierTrainerName(text, gTrainerBattleOpponent_B);
                     toCpy = text;
                 }
-                else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+                else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
                 {
-                    sub_81D5554(text, gTrainerBattleOpponent_B);
+                    GetTrainerHillTrainerName(text, gTrainerBattleOpponent_B);
                     toCpy = text;
                 }
                 else
@@ -2682,9 +2682,9 @@ u32 BattleStringExpandPlaceholders(const u8 *src, u8 *dst)
                     CopyFrontierTrainerText(FRONTIER_LOSE_TEXT, gTrainerBattleOpponent_B);
                     toCpy = gStringVar4;
                 }
-                else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+                else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
                 {
-                    sub_81D572C(4, gTrainerBattleOpponent_B);
+                    CopyTrainerHillTrainerText(4, gTrainerBattleOpponent_B);
                     toCpy = gStringVar4;
                 }
                 else
@@ -2698,9 +2698,9 @@ u32 BattleStringExpandPlaceholders(const u8 *src, u8 *dst)
                     CopyFrontierTrainerText(FRONTIER_WIN_TEXT, gTrainerBattleOpponent_B);
                     toCpy = gStringVar4;
                 }
-                else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+                else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
                 {
-                    sub_81D572C(3, gTrainerBattleOpponent_B);
+                    CopyTrainerHillTrainerText(3, gTrainerBattleOpponent_B);
                     toCpy = gStringVar4;
                 }
                 break;
diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 44194deda..90dacc8cb 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -2739,7 +2739,7 @@ void SetMoveEffect(bool8 primary, u8 certain)
                 break;
             case MOVE_EFFECT_STEAL_ITEM:
                 {
-                    if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+                    if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
                     {
                         gBattlescriptCurrInstr++;
                         break;
@@ -3268,7 +3268,7 @@ static void atk23_getexp(void)
         if (GetBattlerSide(gBattlerFainted) != B_SIDE_OPPONENT || (gBattleTypeFlags &
              (BATTLE_TYPE_LINK
               | BATTLE_TYPE_x2000000
-              | BATTLE_TYPE_x4000000
+              | BATTLE_TYPE_TRAINER_HILL
               | BATTLE_TYPE_FRONTIER
               | BATTLE_TYPE_SAFARI
               | BATTLE_TYPE_BATTLE_TOWER
@@ -4987,7 +4987,7 @@ static void atk4E_switchinanim(void)
         && !(gBattleTypeFlags & (BATTLE_TYPE_LINK
                                  | BATTLE_TYPE_EREADER_TRAINER
                                  | BATTLE_TYPE_x2000000
-                                 | BATTLE_TYPE_x4000000
+                                 | BATTLE_TYPE_TRAINER_HILL
                                  | BATTLE_TYPE_FRONTIER)))
             HandleSetPokedexFlag(SpeciesToNationalPokedexNum(gBattleMons[gActiveBattler].species), FLAG_SET_SEEN, gBattleMons[gActiveBattler].personality);
 
@@ -9405,7 +9405,7 @@ static void atkD1_trysethelpinghand(void)
 static void atkD2_tryswapitems(void) // trick
 {
     // opponent can't swap items with player in regular battles
-    if (gBattleTypeFlags & BATTLE_TYPE_x4000000
+    if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL
         || (GetBattlerSide(gBattlerAttacker) == B_SIDE_OPPONENT
             && !(gBattleTypeFlags & (BATTLE_TYPE_LINK
                                   | BATTLE_TYPE_EREADER_TRAINER
diff --git a/src/battle_setup.c b/src/battle_setup.c
index 17ab20ccd..89a3d9a2c 100644
--- a/src/battle_setup.c
+++ b/src/battle_setup.c
@@ -75,7 +75,7 @@ extern void sub_81D6384(void);
 extern void sub_81D61E8(void);
 extern void sub_80982B8(void);
 extern void sub_81A9EDC(u16 a0);
-extern void sub_81D572C(u8 a0, u16 arg1);
+extern void CopyTrainerHillTrainerText(u8 a0, u16 arg1);
 
 // this file's functions
 static void DoBattlePikeWildBattle(void);
@@ -1281,7 +1281,7 @@ void BattleSetup_StartTrainerBattle(void)
     }
     else if (sub_81D5C18())
     {
-        gBattleTypeFlags |= BATTLE_TYPE_x4000000;
+        gBattleTypeFlags |= BATTLE_TYPE_TRAINER_HILL;
 
         if (gNoOfApproachingTrainers == 2)
             sub_81D639C();
@@ -1370,9 +1370,9 @@ void ShowTrainerIntroSpeech(void)
     else if (sub_81D5C18())
     {
         if (gNoOfApproachingTrainers == 0 || gNoOfApproachingTrainers == 1)
-            sub_81D572C(2, sub_81D6180(gSpecialVar_LastTalked));
+            CopyTrainerHillTrainerText(2, sub_81D6180(gSpecialVar_LastTalked));
         else
-            sub_81D572C(2, sub_81D6180(gEventObjects[gApproachingTrainers[gApproachingTrainerId].eventObjectId].localId));
+            CopyTrainerHillTrainerText(2, sub_81D6180(gEventObjects[gApproachingTrainers[gApproachingTrainerId].eventObjectId].localId));
 
         sub_80982B8();
     }
diff --git a/src/battle_util2.c b/src/battle_util2.c
index 1d2f1e95b..5881abf25 100644
--- a/src/battle_util2.c
+++ b/src/battle_util2.c
@@ -19,7 +19,7 @@ void AllocateBattleResources(void)
 {
     gBattleResources = gBattleResources; // something dumb needed to match
 
-    if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+    if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
         sub_81D55D0();
 
     gBattleStruct = AllocZeroed(sizeof(*gBattleStruct));
@@ -49,7 +49,7 @@ void AllocateBattleResources(void)
 
 void FreeBattleResources(void)
 {
-    if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+    if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
         sub_81D5694();
 
     if (gBattleResources != NULL)
diff --git a/src/pokemon.c b/src/pokemon.c
index e2ce24bdb..8e2e3b764 100644
--- a/src/pokemon.c
+++ b/src/pokemon.c
@@ -6621,7 +6621,7 @@ u16 GetBattleBGM(void)
 
         if (gBattleTypeFlags & BATTLE_TYPE_FRONTIER)
             trainerClass = GetFrontierOpponentClass(gTrainerBattleOpponent_A);
-        else if (gBattleTypeFlags & BATTLE_TYPE_x4000000)
+        else if (gBattleTypeFlags & BATTLE_TYPE_TRAINER_HILL)
             trainerClass = TRAINER_CLASS_EXPERT;
         else
             trainerClass = gTrainers[gTrainerBattleOpponent_A].trainerClass;
diff --git a/src/recorded_battle.c b/src/recorded_battle.c
index 5a12d6114..355ed5e07 100644
--- a/src/recorded_battle.c
+++ b/src/recorded_battle.c
@@ -19,7 +19,7 @@
 #define ILLEGAL_BATTLE_TYPES ((BATTLE_TYPE_LINK | BATTLE_TYPE_SAFARI | BATTLE_TYPE_FIRST_BATTLE                  \
                               | BATTLE_TYPE_WALLY_TUTORIAL | BATTLE_TYPE_ROAMER | BATTLE_TYPE_EREADER_TRAINER   \
                               | BATTLE_TYPE_KYOGRE_GROUDON | BATTLE_TYPE_LEGENDARY | BATTLE_TYPE_REGI           \
-                              | BATTLE_TYPE_RECORDED | BATTLE_TYPE_x4000000 | BATTLE_TYPE_SECRET_BASE           \
+                              | BATTLE_TYPE_RECORDED | BATTLE_TYPE_TRAINER_HILL | BATTLE_TYPE_SECRET_BASE           \
                               | BATTLE_TYPE_GROUDON | BATTLE_TYPE_KYOGRE | BATTLE_TYPE_RAYQUAZA))
 
 extern u8 gUnknown_03001278;