Renamed X Special to X Special Attack and added the item data for Old Gateau and X Special Defense.

src/data/items.h

@@ -828,6 +828,20 @@ const struct Item gItems[] =
         .secondaryId = 0,
     },
 
+    [ITEM_OLD_GATEAU] =
+    {
+        .name = _("Old Gateau"),
+        .itemId = ITEM_OLD_GATEAU,
+        .price = 350,
+        .description = sOldGateauDesc,
+        .pocket = POCKET_ITEMS,
+        .type = 1,
+        .fieldUseFunc = ItemUseOutOfBattle_Medicine,
+        .battleUsage = 1,
+        .battleUseFunc = ItemUseInBattle_Medicine,
+        .secondaryId = 0,
+    },
+
     [ITEM_SACRED_ASH] =
     {
         .name = _("Sacred Ash"),
@@ -1112,10 +1126,24 @@ const struct Item gItems[] =
 
     [ITEM_X_SP_ATK] =
     {
-        .name = _("X Special"),
+        .name = _("X Sp. Atk."),
         .itemId = ITEM_X_SP_ATK,
         .price = 350,
-        .description = sXSpecialDesc,
+        .description = sXSpecialAttackDesc,
+        .pocket = POCKET_ITEMS,
+        .type = 4,
+        .fieldUseFunc = ItemUseOutOfBattle_CannotUse,
+        .battleUsage = 2,
+        .battleUseFunc = ItemUseInBattle_StatIncrease,
+        .secondaryId = 0,
+    },
+
+    [ITEM_X_SP_DEF] =
+    {
+        .name = _("X Sp. Def."),
+        .itemId = ITEM_X_SP_DEF,
+        .price = 2000,
+        .description = sXSpecialDefenseDesc,
         .pocket = POCKET_ITEMS,
         .type = 4,
         .fieldUseFunc = ItemUseOutOfBattle_CannotUse,

src/data/pokemon/item_effects.h

@@ -163,6 +163,10 @@ const u8 gItemEffect_BigMalasada[6] = {
     [3] = ITEM3_STATUS_ALL,
 };
 
+const u8 gItemEffect_OldGateau[6] = {
+    [3] = ITEM3_STATUS_ALL,
+};
+
 const u8 gItemEffect_SacredAsh[7] = {
     [0] = ITEM0_SACRED_ASH,
     [4] = ITEM4_REVIVE | ITEM4_HEAL_HP,
@@ -286,7 +290,14 @@ const u8 gItemEffect_XAccuracy[8] = {
     [7] = 1,
 };
 
-const u8 gItemEffect_XSpecial[8] = {
+const u8 gItemEffect_XSpecialAttack[8] = {
+    [2] = 1,
+    [5] = ITEM5_FRIENDSHIP_LOW | ITEM5_FRIENDSHIP_MID,
+    [6] = 1,
+    [7] = 1,
+};
+
+const u8 gItemEffect_XSpecialDefense[8] = {
     [2] = 1,
     [5] = ITEM5_FRIENDSHIP_LOW | ITEM5_FRIENDSHIP_MID,
     [6] = 1,
@@ -424,6 +435,7 @@ const u8 *const gItemEffectTable[] =
     [ITEM_BERRY_JUICE - ITEM_POTION] = gItemEffect_BerryJuice,
     [ITEM_SWEET_HEART - ITEM_POTION] = gItemEffect_SweetHeart,
     [ITEM_BIG_MALASADA - ITEM_POTION] = gItemEffect_BigMalasada,
+    [ITEM_OLD_GATEAU - ITEM_POTION] = gItemEffect_OldGateau,
     [ITEM_SACRED_ASH - ITEM_POTION] = gItemEffect_SacredAsh,
     [ITEM_HP_UP - ITEM_POTION] = gItemEffect_HPUp,
     [ITEM_PROTEIN - ITEM_POTION] = gItemEffect_Protein,
@@ -440,7 +452,8 @@ const u8 *const gItemEffectTable[] =
     [ITEM_X_DEFENSE - ITEM_POTION] = gItemEffect_XDefend,
     [ITEM_X_SPEED - ITEM_POTION] = gItemEffect_XSpeed,
     [ITEM_X_ACCURACY - ITEM_POTION] = gItemEffect_XAccuracy,
-    [ITEM_X_SP_ATK - ITEM_POTION] = gItemEffect_XSpecial,
+    [ITEM_X_SP_ATK - ITEM_POTION] = gItemEffect_XSpecialAttack,
+    [ITEM_X_SP_DEF - ITEM_POTION] = gItemEffect_XSpecialDefense,
     [ITEM_SUN_STONE - ITEM_POTION] = gItemEffect_EvoStone,
     [ITEM_MOON_STONE - ITEM_POTION] = gItemEffect_EvoStone,
     [ITEM_FIRE_STONE - ITEM_POTION] = gItemEffect_EvoStone,

src/data/text/item_descriptions.h

@@ -280,6 +280,11 @@ static const u8 sBigMalasadaDesc[] = _(
     "status problems of\n"
     "one POKéMON.");
 
+static const u8 sOldGateauDesc[] = _(
+    "Heals all the\n"
+    "status problems of\n"
+    "one POKéMON.");
+
 static const u8 sSacredAshDesc[] = _(
     "Fully revives and\n"
     "restores all\n"
@@ -392,11 +397,16 @@ static const u8 sXAccuracyDesc[] = _(
     "of attack moves\n"
     "during one battle.");
 
-static const u8 sXSpecialDesc[] = _(
+static const u8 sXSpecialAttackDesc[] = _(
     "Raises the stat\n"
     "SP. ATK during one\n"
     "battle.");
 
+static const u8 sXSpecialDefenseDesc[] = _(
+    "Raises the stat\n"
+    "SP. DEF during one\n"
+    "battle.");
+
 static const u8 sPokeDollDesc[] = _(
     "Use to flee from\n"
     "any battle with\n"