added box link functionality

data/maps/ViridianCity_Mart/scripts.inc

@@ -140,6 +140,7 @@ ViridianCity_Mart_Items::
 	.2byte ITEM_N_SOLARIZER
 	.2byte ITEM_N_LUNARIZER
 	.2byte ITEM_HONEY
+	.2byte ITEM_POKEMON_BOX_LINK
 	.2byte ITEM_NONE
 	release
 	end

data/scripts/pc.inc

@@ -99,3 +99,11 @@ EventScript_ExitOaksPC::
 	msgbox Text_ClosedLinkToProfOaksPC
 	goto EventScript_PCMainMenu
 	end
+
+EventScript_AccessPokemonBoxLink::
+	playse SE_PC_LOGIN
+	msgbox Text_OpenedPkmnStorage, MSGBOX_DEFAULT
+	special ShowPokemonStorageSystemPC
+	waitstate
+	goto EventScript_TurnOffPC
+	end

include/event_scripts.h

@@ -1169,6 +1169,7 @@ extern const u8 CableClub_Text_YouMayTradeHere[];
 extern const u8 CableClub_Text_YouMayBattleHere[];
 extern const u8 CableClub_Text_CanMakeBerryPowder[];
 extern const u8 EventScript_PC[];
+extern const u8 EventScript_AccessPokemonBoxLink[];
 
 extern const u8 EventScript_RepelWoreOff[];
 

include/item_use.h

@@ -21,6 +21,7 @@ void ItemUseOutOfBattle_Mail(u8 taskId);
 void ItemUseOutOfBattle_Medicine(u8 taskId);
 void ItemUseOutOfBattle_Mint(u8 taskId);
 void ItemUseOutOfBattle_PokeFlute(u8 taskId);
+void ItemUseOutOfBattle_PokemonBoxLink(u8 taskId);
 void ItemUseOutOfBattle_PowderJar(u8 taskId);
 void ItemUseOutOfBattle_PPRecovery(u8 taskId);
 void ItemUseOutOfBattle_PPUp(u8 taskId);

src/data/items.h

@@ -11114,7 +11114,7 @@ const struct Item gItemsInfo[] =
         .importance = 1,
         .pocket = POCKET_KEY_ITEMS,
         .type = ITEM_TYPE_FIELD,
-        .fieldUseFunc = ItemUseOutOfBattle_CannotUse,
+        .fieldUseFunc = ItemUseOutOfBattle_PokemonBoxLink,
     },
 
     [ITEM_COIN_CASE] =

src/field_specials.c

@@ -226,6 +226,20 @@ bool8 PlayerHasGrassPokemonInParty(void)
     return FALSE;
 }
 
+static bool8 IsPlayerInFrontOfPC(void)
+{
+    s16 x, y;
+    u32 tileInFront;
+
+    GetXYCoordsOneStepInFrontOfPlayer(&x, &y);
+    tileInFront = MapGridGetMetatileIdAt(x, y);
+
+    return (tileInFront == METATILE_Building_PCOff
+         || tileInFront == METATILE_Building_PCOn
+         || tileInFront == METATILE_GenericBuilding1_PlayersPCOff
+         || tileInFront == METATILE_GenericBuilding1_PlayersPCOn);
+}
+
 #define tState data[0]
 #define tTimer data[1]
 
@@ -233,7 +247,7 @@ void AnimatePcTurnOn(void)
 {
     u8 taskId;
 
-    if (FuncIsActiveTask(Task_AnimatePcTurnOn) != TRUE)
+    if (FuncIsActiveTask(Task_AnimatePcTurnOn) != TRUE && IsPlayerInFrontOfPC() == TRUE)
     {
         taskId = CreateTask(Task_AnimatePcTurnOn, 8);
         gTasks[taskId].tState = 0;
@@ -310,6 +324,8 @@ void AnimatePcTurnOff()
     s8 deltaY = 0;
     u8 direction = GetPlayerFacingDirection();
 
+    if (IsPlayerInFrontOfPC() == FALSE)
+        return;
     switch (direction)
     {
     case DIR_NORTH:

src/item_use.c

@@ -10,6 +10,7 @@
 #include "field_effect.h"
 #include "field_fadetransition.h"
 #include "event_object_movement.h"
+#include "event_scripts.h"
 #include "field_player_avatar.h"
 #include "field_specials.h"
 #include "field_weather.h"
@@ -49,6 +50,7 @@ static void Task_ItemUse_CloseMessageBoxAndReturnToField(u8 taskId);
 static void Task_ItemUseWaitForFade(u8 taskId);
 static bool8 FieldCB2_UseItemFromField(void);
 static void CB2_CheckMail(void);
+static void Task_AccessPokemonBoxLink(u8);
 static void ItemUseOnFieldCB_Bicycle(u8 taskId);
 static bool8 CanFish(void);
 static void ItemUseOnFieldCB_Rod(u8 taskId);
@@ -361,6 +363,18 @@ void ItemUseOutOfBattle_Itemfinder(u8 taskId)
     SetUpItemUseOnFieldCallback(taskId);
 }
 
+void ItemUseOutOfBattle_PokemonBoxLink(u8 taskId)
+{
+    sItemUseOnFieldCB = Task_AccessPokemonBoxLink;
+    SetUpItemUseOnFieldCallback(taskId);
+}
+
+static void Task_AccessPokemonBoxLink(u8 taskId)
+{
+    ScriptContext_SetupScript(EventScript_AccessPokemonBoxLink);
+    DestroyTask(taskId);
+}
+
 #define tIsFieldUse data[3]
 
 void ItemUseOutOfBattle_CoinCase(u8 taskId)