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Page: Reclaim Unused Flags
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80x80 Sprites Ability Switcher via special Add A PokeVial Item Add Ability to Avoid Battle Damage in Debug Menu Add Ability to Swap Bikes Whenever Add Choice Specs Scarf hold item effects Add Description Submenu Add Difficulty Mode Add In‐Cart Rumble Add Nuzlocke Challenge Add PC Access in PokeNav Add Physical Special Split Add Sleep Mode Add Thief Ball Add a EV IV Stat Editor UI Add a debug menu Adding Multi region Support Adding Support for Connectivity with Other Hacks Whilst Maintaining Connectivity with Vanilla Adding Time Based Encounters Adding Walking Animations to All NPCs Adding a New Trainer Class Adding a New Trainer Front Picture Adding a Pokémon Type & Disabling the Mystery Type Adding new event object or overworld sprites All Trees Permanently Get Cut Allow All Pokemon to Evolve Without Trading Allow Both Latios and Latias Appear. Allow Feebas to be caught on any Valid Fishing Spot in Route 119 rather than only Three Allow Jumping Over Ledges with Acro Bike Allow Move Relearner to Teach Moves that Pre Evolutions Know Allow Running From Trainer Battles Allow running indoors Amulet Coin Effects If Anyone In Party is Holding It Automatically make the keyboard switch to lowercase after the first character Battle Controllers Battle Engine Glossary Better White Out Money Calculation Button Press to Skip Copyright Screen Chain Fishing Change Enemy Trainer Parties Depending on Difficulty Change Someone's PC to Lanette's PC from the Start of the Game Change Starter Pokémon Change Time Based Evolution Times Change initial PC items Changing the Battle Music Depending on the Opponent Colored stats by nature in summary screen Converting to FR Tilesets Custom Battle Mugshots Custom Border Dimensions Debugging using gdb (Windows, WSL2, Visual Studio Code mGBA) Debugging using printf Disable Bag Use In Battle Disable Catching Pokemon Disable Pokémon animation on Birch's intro Pokémon Disabling Union Room check when entering Pokémon Centers Dynamic Trade Names Dynamic overworld palette system Enable the Reset RTC Feature Enable trade with FRLG without beating the game Expanding The Metatile Count Extra save space with three lines of code Faster HP Drain Feature Branches Fish Will Now Always Get on Hook Fix AI's Switch In Battle Fix Snow Weather Fixing the aspect ratio of the Pokémon logo on the title screen Forcing Battle Animations for Major Battles Full Screen Start Menu by Archie and Mudskip Gen 6 Exp Share Gen 6 style Exp. Share Alternative Option Get Match Calls Only If Caller Wants a Rematch Get Rid of Battery Run Dry Error Message Get Rid of Pokemon Disobeying You Getting Help with the Decomps Holding Select Allows For A Second Register Item Home How Menus Work ‐ Index How Menus Work ‐ Part 1 How Menus Work ‐ Part 2 How Menus Work ‐ Part 3 How the Game Works How to Support Savefile Backwards Compatibility How to add a new Pokémon species How to add a new ability How to add a new region map How to create a new regular trainer battle How to delete a map Implement Missing Text Function RESET_FONT Implementing Catch EXP Implementing ipatix's High Quality Audio Mixer Implementing the “textcolor” script command from FRLG and give object events their own text colour Improve Partner Battle Code Improve the Loading of Battle Terrain Improving the WaitForVBlank function Increase money limit Infinite TM usage Instead of Asking to Stop learning a New Move, You'll be Asked to Continue Learning Item Automatically Goes to PC if Bag is Full Item Limits In Battle Keep the Camera from Making Waves LGPE Style Bonus Premier Balls Latent Functions Learn moves upon evolution List Menu Text Coloring Make Cleanse Tag Avoid All Wild Encounters and Usable If Held By Anyone in Your Party; Make PokeDoll Do the Same for Trainers Seeing You Make Daycare Faster at Leveling Pokémon Make Key Items That Cannot Be Used In The Field Not Show A Use or Register Option Make L Button Be Turbo A When L=A Option Is Set Make Ledge Jumps Check Collision Make Mirage Island Check PC Pokémon Make Move Relearner Teach Egg Moves With A Flag Make Multiple Secret Bases Make Norman's Slaking Have Ability Intimidate Make Pokemon Not Heal When Going into PC Make Pokemon that Require a Fateful Encounter to be Legal to Always Be Set to Legal Make space for EWRAM Data for Summary screen Make the Bag Able to Hold 120 Items Instead of 30 Make the Person in the Intro Match the the Save File Map Based Trainer Battle Music Move Item Multipage Options Menu Music Guide (m4a engine & poryaaaa) Name Rater Allows Traded Pokemon to be Renamed New Birch's Briefcase With Fully Custom Starters by Archie and Mudskip New Custom Menu Border Themes (Basic) New Main Menu UI With Mugshot by Archie and Mudskip New Options Plus ‐ Multipage Options Menu with Faster Text, HP‐EXP Bar Speeds and Metric Nickname your Pokémon from the party menu Not showing dex entries until getting the Pokédex Omnidirectional Jump Optimization ‐ Remove Expensive and Redundant `BuildColorMaps()` Function Option to Skip Copyright and Intro Overview: Items and their Effects Overview: The Party Menu Overview∶ The Game Loop Overview∶ The Task System Per Shop\Mart Item Prices Plural Giveitem Pokecenters Disregard Eggs Porting Fired Tilesets to Emerald (alternate version) Prompt for reusing Repels Push B in wild battle moves to Run Push B to Toggle Running Shoes Pushing B When Asked To Stop Learning Move Will Cancel Teaching The Move Quickly Run from a Battle by Holding Right While the Wild Pokémon's Name Appears Raise Odds of Catching a Pokemon by Pressing B When the Ball Shakes Random Info, Tips, and Tricks Rearrange And Organise Flags Reclaim Unused Flags Reflections Remove 'Select' Sound From Specific Map Events Remove Warp Fadescreen Remove badge boosts Remove the backup save file Remove the extra save confirmation Remove the functionally redundant move grammar tables Removing the Animation Affines Repeated Field Medicine Use Repurposing the Link Battle placeholders Reuse filler save space for Variables and Flags Roamers Scanline Effects Set Metatile IDs From Another Map Set Up Item Balls on a Map Without Needing New Scripts Shifting to Pokémon Already in Battle Exits the Shift Menu Shiny Creation With a Flag Shop Items By Badge Count Show IVs EVs in Summary Screen Show Species That You're Switching For in the Party Menu Show Type Effectiveness In Battle Using Pre Existing Function and Disable in Option Menu Show a throbber animation while the game is saving Shuckle makes Berry Juice Something doesn't work I need help etc. Spawn Invisible Player Speedy Nurse Joy Spinda Second Frame Spot Addition Stair Warps Supplementary Scripting Macros Surfing Dismount Ground Effects Temporarily Replace Player or Enemy Party Pokemon The Basics of Scripting Toggle Trainer Sight Trainer Backsprite Editing Trainer Class Based Poké Balls Trainer Scripts Trainers No Longer Spin to Face You Right As You Pass Them Trigger Map Scripts By Flag Triple layer metatiles Tutorials Tweaking the count of health beeps Uniquely Shuffle Array Update Sitrus Berry's effect to Gen 4 standard Use HMs Without Any Pokemon in your Party Knowing Them Useful Modding Tools Useful Scripting Specials Why You Should (Almost) Always Be Using 32‐Bit Variables in Your Code Why should I use this over binary hacking
1 Reclaim Unused Flags
judicornadamsfoster edited this page 2026-05-17 17:56:15 +01:00
Table of Contents

Reclaim Unused Flags

There are many flags in the game that are unused but are defined in other places and other files.

This guide will show how to reclaim these flags and give an extra 54 flags and an extra 3 system flags.

#define FLAG_MOSSDEEP_GYM_SWITCH_1 0x64 // Leftover from the RS version of Mossdeep Gym, functionally unused

#define FLAG_MOSSDEEP_GYM_SWITCH_2 0x65 //

#define FLAG_MOSSDEEP_GYM_SWITCH_3 0x66 //

#define FLAG_MOSSDEEP_GYM_SWITCH_4 0x67 //

in data/maps/MossdeepCity/scripts.inc, in section MossdeepCity_OnTransition, delete these 4 lines (lines 6 to 9)

	clearflag FLAG_MOSSDEEP_GYM_SWITCH_1
	clearflag FLAG_MOSSDEEP_GYM_SWITCH_2
	clearflag FLAG_MOSSDEEP_GYM_SWITCH_3
	clearflag FLAG_MOSSDEEP_GYM_SWITCH_4

in 'data/maps/MossdeepCity_Gym/scripts.inc', delete (line 2):

`map_script MAP_SCRIPT_ON_LOAD, MossdeepCity_Gym_OnLoad`

delete entire sections (lines 5 to 49)

from @ NOTE: Mossdeep Gym was redesigned between R/S and E. Leftover (and now functionally unused) scripts are commented below

to MossdeepCity_Gym_EventScript_SetSwitch4Metatiles

delete entire sections (line 112 to 197)

from @ All the below switch scripts are leftover from RS and are functionally unused

to MossdeepCity_Gym_EventScript_ClearSwitch4

#define FLAG_UNUSED_RS_LEGENDARY_BATTLE_DONE 0x71 // Unused Flag. Used in R/S to indicate whether player defeated or caught Groudon/Kyogre in Cave of Origin.

delete this line from all 4 of these files:

call_if_set FLAG_UNUSED_RS_LEGENDARY_BATTLE_DONE, CaveOfOrigin_EventScript_DisableTriggers

data/maps/CaveOfOrigin_1F/scripts.inc
data/maps/CaveOfOrigin_UnusedRubySapphireMap1/scripts.inc
data/maps/CaveOfOrigin_UnusedRubySapphireMap2/scripts.inc
data/maps/CaveOfOrigin_UnusedRubySapphireMap3/scripts.inc

#define FLAG_TRICK_HOUSE_PUZZLE_7_SWITCH_1 0xC2 // Leftover from the RS version of Puzzle Room 7, functionally unused

#define FLAG_TRICK_HOUSE_PUZZLE_7_SWITCH_2 0xC3 //

#define FLAG_TRICK_HOUSE_PUZZLE_7_SWITCH_3 0xC4 //

#define FLAG_TRICK_HOUSE_PUZZLE_7_SWITCH_4 0xC5 //

#define FLAG_TRICK_HOUSE_PUZZLE_7_SWITCH_5 0xC6 //

in data/maps/Route110_TrickHousePuzzle7/scripts.inc

(NOTE: doing this will also free up variable VAR_TRICK_HOUSE_PUZZLE_7_STATE_2 0x40B6 // Leftover from RS, never set)

in the map_script header, delete: (lines 2 to 5)

	map_script MAP_SCRIPT_ON_RESUME, Route110_TrickHousePuzzle7_OnResume

	map_script MAP_SCRIPT_ON_TRANSITION, Route110_TrickHousePuzzle7_OnTransition

	map_script MAP_SCRIPT_ON_LOAD, Route110_TrickHousePuzzle7_OnLoad

	map_script MAP_SCRIPT_ON_FRAME_TABLE, Route110_TrickHousePuzzle7_OnFrame

delete lines and entire sections (lines 8 to 96)

	@ Puzzle Room 7 in RSE uses whatever puzzle Mossdeep Gym uses

	@ Because Mossdeep Gym was redesigned for Emerald, theres a good deal of leftover script from the old R/S puzzle

	Route110_TrickHousePuzzle7_OnResume

	Route110_TrickHousePuzzle7_EventScript_UpdateSwitchMetatiles

	@ Leftover from R/S, none of the below metatile scripts are ever called

	Route110_TrickHousePuzzle7_EventScript_SetSwitch1MetatilesOn

	Route110_TrickHousePuzzle7_EventScript_SetSwitch2MetatilesOn

	Route110_TrickHousePuzzle7_EventScript_SetSwitch3MetatilesOn

	Route110_TrickHousePuzzle7_EventScript_SetSwitch4MetatilesOn

	Route110_TrickHousePuzzle7_EventScript_SetSwitch5MetatilesOn

	Route110_TrickHousePuzzle7_EventScript_SetSwitch1MetatilesOff

	Route110_TrickHousePuzzle7_EventScript_SetSwitch2MetatilesOff

	Route110_TrickHousePuzzle7_EventScript_SetSwitch3MetatilesOff

	Route110_TrickHousePuzzle7_EventScript_SetSwitch4MetatilesOff

	Route110_TrickHousePuzzle7_EventScript_SetSwitch5MetatilesOff

	Route110_TrickHousePuzzle7_OnTransition

	Route110_TrickHousePuzzle7_EventScript_TeleportedTransition

	Route110_TrickHousePuzzle7_OnLoad

	Route110_TrickHousePuzzle7_OnFrame

	Route110_TrickHousePuzzle7_EventScript_ClearState2

then delete entire sections (lines 109 to 223)

	@ Unused, leftover from R/S

	Route110_TrickHousePuzzle7_EventScript_TeleportPad

	@ All the below switch scripts are unused leftover from R/S

	Route110_TrickHousePuzzle7_EventScript_Switch1

	Route110_TrickHousePuzzle7_EventScript_Switch2

	Route110_TrickHousePuzzle7_EventScript_Switch3

	Route110_TrickHousePuzzle7_EventScript_Switch4

	Route110_TrickHousePuzzle7_EventScript_Switch5

	@ All the below switch scripts are unused leftover from R/S

	Route110_TrickHousePuzzle7_EventScript_SetSwitch1On

	Route110_TrickHousePuzzle7_EventScript_SetSwitch1Off

	Route110_TrickHousePuzzle7_EventScript_SetSwitch2On

	Route110_TrickHousePuzzle7_EventScript_SetSwitch2Off

	Route110_TrickHousePuzzle7_EventScript_SetSwitch3On

	Route110_TrickHousePuzzle7_EventScript_SetSwitch3Off

	Route110_TrickHousePuzzle7_EventScript_SetSwitch4On

	Route110_TrickHousePuzzle7_EventScript_SetSwitch4Off

	Route110_TrickHousePuzzle7_EventScript_SetSwitch5On

	Route110_TrickHousePuzzle7_EventScript_SetSwitch5Off

#define FLAG_NEVER_SET_0x0DC 0xDC // This flag is read, but never written to

in src/match_call.c, in section static bool32 MapAllowsMatchCall(void)

    if (gMapHeader.regionMapSectionId == MAPSEC_SOOTOPOLIS_CITY
     && FlagGet(FLAG_HIDE_SOOTOPOLIS_CITY_RAYQUAZA) == TRUE
     && FlagGet(FLAG_NEVER_SET_0x0DC) == FALSE)
        return FALSE;

Change this to:

if (gMapHeader.regionMapSectionId == MAPSEC_SOOTOPOLIS_CITY
     && FlagGet(FLAG_HIDE_SOOTOPOLIS_CITY_RAYQUAZA) == TRUE)
        return FALSE;

#define FLAG_CONTEST_SKETCH_CREATED 0x10E // Set but never read

in data/maps/FallarborTown/scripts.inc, delete line 8 clearflag FLAG_CONTEST_SKETCH_CREATED

in data/scripts/contest_hall.inc, delete line 1047 setflag FLAG_CONTEST_SKETCH_CREATED

#define FLAG_WONDER_CARD_UNUSED_1 0x13D // These Wonder Card flags are referenced but never set

to

#define FLAG_WONDER_CARD_UNUSED_17 0x14D

change this line:

#define NUM_WONDER_CARD_FLAGS (1 + FLAG_WONDER_CARD_UNUSED_17 - FLAG_RECEIVED_AURORA_TICKET)

to:

#define NUM_WONDER_CARD_FLAGS (1 + FLAG_RECEIVED_OLD_SEA_MAP - FLAG_RECEIVED_AURORA_TICKET)

in src/mystery_gift.c, in section: static const u16 sReceivedGiftFlags[]

delete the 17 lines that start FLAG_WONDER_CARD_UNUSED (lines 234 to 250)

so the section should be:

static const u16 sReceivedGiftFlags[] =
{
    FLAG_RECEIVED_AURORA_TICKET,
    FLAG_RECEIVED_MYSTIC_TICKET,
    FLAG_RECEIVED_OLD_SEA_MAP,
};

#define FLAG_MYSTERY_GIFT_DONE 0x1E4

I would suggest leaving this one alone, but the following can be removed

#define FLAG_MYSTERY_GIFT_1 0x1E5

to

#define FLAG_MYSTERY_GIFT_15 0x1F3

in src/event_data.c, in section void ClearMysteryGiftFlags(void)

delete lines 115 to 129

    FlagClear(FLAG_MYSTERY_GIFT_1);
    FlagClear(FLAG_MYSTERY_GIFT_2);
    FlagClear(FLAG_MYSTERY_GIFT_3);
    FlagClear(FLAG_MYSTERY_GIFT_4);
    FlagClear(FLAG_MYSTERY_GIFT_5);
    FlagClear(FLAG_MYSTERY_GIFT_6);
    FlagClear(FLAG_MYSTERY_GIFT_7);
    FlagClear(FLAG_MYSTERY_GIFT_8);
    FlagClear(FLAG_MYSTERY_GIFT_9);
    FlagClear(FLAG_MYSTERY_GIFT_10);
    FlagClear(FLAG_MYSTERY_GIFT_11);
    FlagClear(FLAG_MYSTERY_GIFT_12);
    FlagClear(FLAG_MYSTERY_GIFT_13);
    FlagClear(FLAG_MYSTERY_GIFT_14);
    FlagClear(FLAG_MYSTERY_GIFT_15);

so the section should look like:

void ClearMysteryGiftFlags(void)
{
    FlagClear(FLAG_MYSTERY_GIFT_DONE);
}

#define FLAG_UNKNOWN_0x363 0x363 // Set, however has no purpose.

in data/scripts/new_game.inc, delete line 126 setflag FLAG_UNKNOWN_0x363

#define FLAG_UNKNOWN_0x393 0x393 // Set, however has no purpose.

in data/scripts/new_game.inc, delete line 223 setflag FLAG_UNKNOWN_0x393

and in data/maps/MossdeepCity_Gym/scripts.inc, delete line 69 clearflag FLAG_UNKNOWN_0x393

unused flags leftover from R/S

#define FLAG_RECEIVED_CONTEST_PASS 0x96 // Unused, leftover from R/S

#define FLAG_ITEM_ROUTE_123_RARE_CANDY 0x409 // Unused Flag, leftover from R/S. In Emerald this is a hidden item and uses a different flag

#define FLAG_HIDE_LEGEND_MON_CAVE_OF_ORIGIN 0x339 // Unused, leftover from R/S

#define FLAG_ITEM_OLD_MAGMA_HIDEOUT_B1F_MASTER_BALL 0x465 // Unused Flag, leftover from the Ruby Magma hideout

#define FLAG_ITEM_OLD_MAGMA_HIDEOUT_B1F_MAX_ELIXIR 0x466 // Unused Flag, leftover from the Ruby Magma hideout

#define FLAG_ITEM_OLD_MAGMA_HIDEOUT_B2F_NEST_BALL 0x467 // Unused Flag, leftover from the Ruby Magma hideout

#define FLAG_ITEM_MOSSDEEP_STEVENS_HOUSE_HM08 0x46D // Unused Flag, leftover from R/S. HM08 is given to the player directly in Emerald

none of these flags are references anywhere and can just be named

unused system flags leftover from R/S

#define FLAG_SYS_CAVE_SHIP (SYSTEM_FLAGS + 0x37) // Unused Flag, leftover from R/S debug, presumably used by Emerald's debug too

#define FLAG_SYS_CAVE_WONDER (SYSTEM_FLAGS + 0x38) // Unused Flag, same as above

#define FLAG_SYS_CAVE_BATTLE (SYSTEM_FLAGS + 0x39) // Unused Flag, same as above

none of these flags are references anywhere and can just be named

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