Added config to prevent unobtainable Pokemon from being shiny (#4735)

* Added config to prevent unobtainable Pokemon from being shiny

* Added config for disabling shinies if the player has no Poke Balls

* Removed check for adventure started flag

include/config/pokemon.h

@@ -48,6 +48,8 @@
 #define P_TM_LITERACY                    GEN_LATEST  // Since Gen 6, TM illiterate Pokémon can learn TMs that teach moves that are in their level-up learnsets.
 #define P_EGG_CYCLE_LENGTH               GEN_LATEST  // Since Gen 8, egg cycles take half as many steps as before.
 #define P_TWO_FRAME_FRONT_SPRITES        TRUE        // In Pokémon Emerald, Pokémon front sprites always consist of two frames. This config can revert it to only use the first frame, as is the case in the other Gen 3 games.
+#define P_ONLY_OBTAINABLE_SHINIES        FALSE       // If TRUE, Pokémon encountered in the Battle Pyramid won't be shiny.
+#define P_NO_SHINIES_WITHOUT_POKEBALLS   FALSE       // If TRUE, Pokémon encountered when the player is out of Poké Balls won't be shiny
 
 // Learnset helper toggles
 #define P_LEARNSET_HELPER_TEACHABLE TRUE        // If TRUE, teachable_learnsets.h will be populated by tools/learnset_helpers/teachable.py using the included JSON files based on available TMs and tutors.

include/item.h

@@ -44,6 +44,7 @@ u8 *CopyItemNameHandlePlural(u16 itemId, u8 *dst, u32 quantity);
 bool8 IsBagPocketNonEmpty(u8 pocket);
 bool8 CheckBagHasItem(u16 itemId, u16 count);
 bool8 HasAtLeastOneBerry(void);
+bool8 HasAtLeastOnePokeBall(void);
 bool8 CheckBagHasSpace(u16 itemId, u16 count);
 u32 GetFreeSpaceForItemInBag(u16 itemId);
 bool8 AddBagItem(u16 itemId, u16 count);

src/item.c

@@ -164,6 +164,18 @@ bool8 HasAtLeastOneBerry(void)
     return FALSE;
 }
 
+bool8 HasAtLeastOnePokeBall(void)
+{
+    u16 i;
+
+    for (i = FIRST_BALL; i <= LAST_BALL; i++)
+    {
+        if (CheckBagHasItem(i, 1) == TRUE)
+            return TRUE;
+    }
+    return FALSE;
+}
+
 bool8 CheckBagHasSpace(u16 itemId, u16 count)
 {
     if (ItemId_GetPocket(itemId) == POCKET_NONE)

src/pokemon.c

@@ -1143,6 +1143,14 @@ void CreateBoxMon(struct BoxPokemon *boxMon, u16 species, u8 level, u8 fixedIV,
         {
             isShiny = TRUE;
         }
+        else if (P_ONLY_OBTAINABLE_SHINIES && InBattlePyramid())
+        {
+            isShiny = FALSE;
+        }
+        else if (P_NO_SHINIES_WITHOUT_POKEBALLS && !HasAtLeastOnePokeBall())
+        {
+            isShiny = FALSE;
+        }
         else
         {
             u32 totalRerolls = 0;