Ability Capsule

include/constants/item_effects.h

@@ -49,7 +49,9 @@
 
 #define ITEM5_FRIENDSHIP_ALL    (ITEM5_FRIENDSHIP_LOW | ITEM5_FRIENDSHIP_MID | ITEM5_FRIENDSHIP_HIGH)
 
-// fields 6 and onwards are item-specific arguments
+// fields 6 - 9 are item-specific arguments
+
+#define ITEM10_IS_VITAMIN       0x1
 
 // Used for GetItemEffectType.
 #define ITEM_EFFECT_X_ITEM 0

include/item_use.h

@@ -25,6 +25,7 @@ void sub_80C9D00(u8);
 void ItemUseOutOfBattle_WailmerPail(u8);
 void sub_80C9D74(u8);
 void ItemUseOutOfBattle_Medicine(u8);
+void ItemUseOutOfBattle_AbilityCapsule(u8);
 void ItemUseOutOfBattle_ReduceEV(u8);
 void ItemUseOutOfBattle_SacredAsh(u8);
 void ItemUseOutOfBattle_PPRecovery(u8);

include/party_menu.h

@@ -71,6 +71,7 @@ void LoadHeldItemIcons(void);
 void sub_81B5D4C(u8 *a, u8 *b, u8 c);
 void sub_81B617C(void);
 void ItemUseCB_Medicine(u8 taskId, TaskFunc task);
+void ItemUseCB_AbilityCapsule(u8 taskId, TaskFunc task);
 void sub_81B67C8(u8 taskId, TaskFunc task);
 void dp05_ether(u8 taskId, TaskFunc task);
 void dp05_pp_up(u8 taskId, TaskFunc task);

src/data/items.h

@@ -1216,8 +1216,8 @@ const struct Item gItems[] =
         .holdEffectParam = 0,
         .description = sAbilityCapsuleDesc,
         .pocket = POCKET_ITEMS,
-        .type = 4,
+        .type = 1,
-        .fieldUseFunc = ItemUseOutOfBattle_CannotUse, // Placeholder
+        .fieldUseFunc = ItemUseOutOfBattle_AbilityCapsule,
         .secondaryId = 0,
     },
 

src/data/pokemon/item_effects.h

@@ -180,7 +180,7 @@ const u8 gItemEffect_HPUp[11] = {
     [7] = 5,
     [8] = 3,
     [9] = 2,
-    [10] = 1,
+    [10] = ITEM10_IS_VITAMIN,
 };
 
 const u8 gItemEffect_Protein[11] = {
@@ -190,7 +190,7 @@ const u8 gItemEffect_Protein[11] = {
     [7] = 5,
     [8] = 3,
     [9] = 2,
-    [10] = 1,
+    [10] = ITEM10_IS_VITAMIN,
 };
 
 const u8 gItemEffect_Iron[11] = {
@@ -199,7 +199,7 @@ const u8 gItemEffect_Iron[11] = {
     [7] = 5,
     [8] = 3,
     [9] = 2,
-    [10] = 1,
+    [10] = ITEM10_IS_VITAMIN,
 };
 
 const u8 gItemEffect_Carbos[11] = {
@@ -208,7 +208,7 @@ const u8 gItemEffect_Carbos[11] = {
     [7] = 5,
     [8] = 3,
     [9] = 2,
-    [10] = 1,
+    [10] = ITEM10_IS_VITAMIN,
 };
 
 const u8 gItemEffect_Calcium[11] = {
@@ -217,7 +217,7 @@ const u8 gItemEffect_Calcium[11] = {
     [7] = 5,
     [8] = 3,
     [9] = 2,
-    [10] = 1,
+    [10] = ITEM10_IS_VITAMIN,
 };
 
 const u8 gItemEffect_Zinc[11] = {
@@ -226,7 +226,7 @@ const u8 gItemEffect_Zinc[11] = {
     [7] = 5,
     [8] = 3,
     [9] = 2,
-    [10] = 1,
+    [10] = ITEM10_IS_VITAMIN,
 };
 
 const u8 gItemEffect_HpWing[11] = {

src/item_use.c

@@ -726,6 +726,12 @@ void ItemUseOutOfBattle_Medicine(u8 taskId)
     SetUpItemUseCallback(taskId);
 }
 
+void ItemUseOutOfBattle_AbilityCapsule(u8 taskId)
+{
+    gUnknown_03006328 = ItemUseCB_AbilityCapsule;
+    SetUpItemUseCallback(taskId);
+}
+
 void ItemUseOutOfBattle_ReduceEV(u8 taskId)
 {
     gUnknown_03006328 = sub_81B67C8;

src/party_menu.c

@@ -5482,6 +5482,100 @@ void ItemUseCB_Medicine(u8 taskId, TaskFunc task)
     }
 }
 
+#define tState      data[0]
+#define tSpecies    data[1]
+#define tAbilityNum data[2]
+#define tMonId      data[3]
+#define tOldFunc    4
+
+void Task_AbilityCapsule(u8 taskId)
+{
+    static const u8 askText[] = _("Would you like to change {STR_VAR_1}'s\nability to {STR_VAR_2}?");
+    static const u8 doneText[] = _("{STR_VAR_1}'s ability became\n{STR_VAR_2}!{PAUSE_UNTIL_PRESS}");
+    s16 *data = gTasks[taskId].data;
+
+    switch (tState)
+    {
+    case 0:
+        // Can't use.
+        if (gBaseStats[tSpecies].abilities[0] == gBaseStats[tSpecies].abilities[1]
+            || gBaseStats[tSpecies].abilities[1] == 0
+            || tAbilityNum > 1
+            || !tSpecies)
+        {
+            gUnknown_0203CEE8 = 0;
+            PlaySE(SE_SELECT);
+            sub_81B1B5C(gText_WontHaveEffect, 1);
+            schedule_bg_copy_tilemap_to_vram(2);
+            gTasks[taskId].func = sub_81B6794;
+            return;
+        }
+        gUnknown_0203CEE8 = 1;
+        GetMonNickname(&gPlayerParty[tMonId], gStringVar1);
+        StringCopy(gStringVar2, gAbilityNames[GetAbilityBySpecies(tSpecies, tAbilityNum)]);
+        StringExpandPlaceholders(gStringVar4, askText);
+        PlaySE(SE_SELECT);
+        sub_81B1B5C(gStringVar4, 1);
+        schedule_bg_copy_tilemap_to_vram(2);
+        tState++;
+        break;
+    case 1:
+        if (!sub_81B1BD4())
+        {
+            sub_81B334C();
+            tState++;
+        }
+        break;
+    case 2:
+        switch (Menu_ProcessInputNoWrapClearOnChoose())
+        {
+        case 0:
+            tState++;
+            break;
+        case 1:
+        case MENU_B_PRESSED:
+            gUnknown_0203CEE8 = 0;
+            PlaySE(SE_SELECT);
+            schedule_bg_copy_tilemap_to_vram(2);
+            // Don't exit party selections screen, return to choosing a mon.
+            ClearStdWindowAndFrameToTransparent(6, 0);
+            ClearWindowTilemap(6);
+            display_pokemon_menu_message(5);
+            gTasks[taskId].func = (void *)GetWordTaskArg(taskId, tOldFunc);
+            return;
+        }
+        break;
+    case 3:
+        PlaySE(SE_KAIFUKU);
+        StringExpandPlaceholders(gStringVar4, doneText);
+        sub_81B1B5C(gStringVar4, 1);
+        schedule_bg_copy_tilemap_to_vram(2);
+        tState++;
+        break;
+    case 4:
+        if (!sub_81B1BD4())
+            tState++;
+        break;
+    case 5:
+        SetMonData(&gPlayerParty[tMonId], MON_DATA_ABILITY_NUM, &tAbilityNum);
+        RemoveBagItem(gSpecialVar_ItemId, 1);
+        gTasks[taskId].func = sub_81B12C0;
+        break;
+    }
+}
+
+void ItemUseCB_AbilityCapsule(u8 taskId, TaskFunc task)
+{
+    s16 *data = gTasks[taskId].data;
+
+    tState = 0;
+    tMonId = gUnknown_0203CEC8.slotId;
+    tSpecies = GetMonData(&gPlayerParty[tMonId], MON_DATA_SPECIES, NULL);
+    tAbilityNum = GetMonData(&gPlayerParty[tMonId], MON_DATA_ABILITY_NUM, NULL) ^ 1;
+    SetWordTaskArg(taskId, tOldFunc, (uintptr_t)(gTasks[taskId].func));
+    gTasks[taskId].func = Task_AbilityCapsule;
+}
+
 static void sub_81B672C(u8 taskId)
 {
     GetMonNickname(&gPlayerParty[gUnknown_0203CEC8.slotId], gStringVar1);

src/pokemon.c

@@ -4818,7 +4818,7 @@ bool8 PokemonUseItemEffects(struct Pokemon *mon, u16 item, u8 partyIndex, u8 mov
                             if (evCount >= MAX_TOTAL_EVS)
                                 return TRUE;
 
-                            if (itemEffect[10])
+                            if (itemEffect[10] & ITEM10_IS_VITAMIN)
                                 evCap = 100;
                             else
                                 evCap = 252;
@@ -5028,7 +5028,7 @@ bool8 PokemonUseItemEffects(struct Pokemon *mon, u16 item, u8 partyIndex, u8 mov
                             if (evCount >= MAX_TOTAL_EVS)
                                 return TRUE;
 
-                            if (itemEffect[10])
+                            if (itemEffect[10] & ITEM10_IS_VITAMIN)
                                 evCap = 100;
                             else
                                 evCap = 252;