Created Shop Items By Badge Count (markdown)

Shop-Items-By-Badge-Count.md

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+## Shop Items By Badge Count
+
+Pokemart/Shop Items have been determined by the player's badge count for some time. So let's add this feature with Generation VIII items!
+
+### Add the item lists
+Open [src/shop.c](../blob/master/src/shop.c). Add the following above _sShopPurchaseYesNoFuncs_
+```c
+static const u16 sShopInventory_ZeroBadges[] = {
+    ITEM_POKE_BALL,
+    ITEM_POTION,
+    ITEM_ANTIDOTE,
+    ITEM_BURN_HEAL,
+    ITEM_ICE_HEAL,
+    ITEM_AWAKENING,
+    ITEM_PARALYZE_HEAL,
+    ITEM_REVIVE,
+    ITEM_NONE
+};
+
+static const u16 sShopInventory_OneBadge[] = {
+    ITEM_POKE_BALL,
+    ITEM_GREAT_BALL,
+    ITEM_POTION,
+    ITEM_SUPER_POTION,
+    ITEM_ANTIDOTE,
+    ITEM_BURN_HEAL,
+    ITEM_ICE_HEAL,
+    ITEM_AWAKENING,
+    ITEM_PARALYZE_HEAL,
+    ITEM_REVIVE,
+    ITEM_NONE
+};
+
+static const u16 sShopInventory_TwoBadges[] = {
+    ITEM_POKE_BALL,
+    ITEM_GREAT_BALL,
+    ITEM_POTION,
+    ITEM_SUPER_POTION,
+    ITEM_ANTIDOTE,
+    ITEM_BURN_HEAL,
+    ITEM_ICE_HEAL,
+    ITEM_AWAKENING,
+    ITEM_PARALYZE_HEAL,
+    ITEM_REVIVE,
+    ITEM_POKE_DOLL,
+    ITEM_NONE
+};
+
+static const u16 sShopInventory_ThreeBadges[] = {
+    ITEM_POKE_BALL,
+    ITEM_GREAT_BALL,
+    ITEM_POTION,
+    ITEM_SUPER_POTION,
+    ITEM_ANTIDOTE,
+    ITEM_BURN_HEAL,
+    ITEM_ICE_HEAL,
+    ITEM_AWAKENING,
+    ITEM_PARALYZE_HEAL,
+    ITEM_REVIVE,
+    ITEM_REPEL,
+    ITEM_POKE_DOLL,
+    ITEM_NONE
+};
+
+static const u16 sShopInventory_FourBadges[] = {
+    ITEM_POKE_BALL,
+    ITEM_GREAT_BALL,
+    ITEM_POTION,
+    ITEM_SUPER_POTION,
+    ITEM_HYPER_POTION,
+    ITEM_ANTIDOTE,
+    ITEM_BURN_HEAL,
+    ITEM_ICE_HEAL,
+    ITEM_AWAKENING,
+    ITEM_PARALYZE_HEAL,
+    ITEM_REVIVE,
+    ITEM_REPEL,
+    ITEM_POKE_DOLL,
+    ITEM_NONE
+};
+
+static const u16 sShopInventory_FiveBadges[] = {
+    ITEM_POKE_BALL,
+    ITEM_GREAT_BALL,
+    ITEM_ULTRA_BALL,
+    ITEM_POTION,
+    ITEM_SUPER_POTION,
+    ITEM_HYPER_POTION,
+    ITEM_ANTIDOTE,
+    ITEM_BURN_HEAL,
+    ITEM_ICE_HEAL,
+    ITEM_AWAKENING,
+    ITEM_PARALYZE_HEAL,
+    ITEM_REVIVE,
+    ITEM_REPEL,
+    ITEM_SUPER_REPEL,
+    ITEM_POKE_DOLL,
+    ITEM_NONE
+};
+
+static const u16 sShopInventory_SixBadges[] = {
+    ITEM_POKE_BALL,
+    ITEM_GREAT_BALL,
+    ITEM_ULTRA_BALL,
+    ITEM_POTION,
+    ITEM_SUPER_POTION,
+    ITEM_HYPER_POTION,
+    ITEM_ANTIDOTE,
+    ITEM_BURN_HEAL,
+    ITEM_ICE_HEAL,
+    ITEM_AWAKENING,
+    ITEM_PARALYZE_HEAL,
+    ITEM_FULL_HEAL,
+    ITEM_REVIVE,
+    ITEM_REPEL,
+    ITEM_SUPER_REPEL,
+    ITEM_POKE_DOLL,
+    ITEM_NONE
+};
+
+static const u16 sShopInventory_SevenBadges[] = {
+    ITEM_POKE_BALL,
+    ITEM_GREAT_BALL,
+    ITEM_ULTRA_BALL,
+    ITEM_POTION,
+    ITEM_SUPER_POTION,
+    ITEM_HYPER_POTION,
+    ITEM_MAX_POTION,
+    ITEM_ANTIDOTE,
+    ITEM_BURN_HEAL,
+    ITEM_ICE_HEAL,
+    ITEM_AWAKENING,
+    ITEM_PARALYZE_HEAL,
+    ITEM_FULL_HEAL,
+    ITEM_REVIVE,
+    ITEM_REPEL,
+    ITEM_SUPER_REPEL,
+    ITEM_MAX_REPEL,
+    ITEM_POKE_DOLL,
+    ITEM_NONE
+};
+
+static const u16 sShopInventory_EightBadges[] = {
+    ITEM_POKE_BALL,
+    ITEM_GREAT_BALL,
+    ITEM_ULTRA_BALL,
+    ITEM_POTION,
+    ITEM_SUPER_POTION,
+    ITEM_HYPER_POTION,
+    ITEM_MAX_POTION,
+    ITEM_FULL_RESTORE,
+    ITEM_ANTIDOTE,
+    ITEM_BURN_HEAL,
+    ITEM_ICE_HEAL,
+    ITEM_AWAKENING,
+    ITEM_PARALYZE_HEAL,
+    ITEM_FULL_HEAL,
+    ITEM_REVIVE,
+    ITEM_REPEL,
+    ITEM_SUPER_REPEL,
+    ITEM_MAX_REPEL,
+    ITEM_POKE_DOLL,
+    ITEM_NONE
+};
+
+static const u16 *const sShopInventories[] = 
+{
+    sShopInventory_ZeroBadges, 
+    sShopInventory_OneBadge,
+    sShopInventory_TwoBadges,
+    sShopInventory_ThreeBadges,
+    sShopInventory_FourBadges,
+    sShopInventory_FiveBadges,
+    sShopInventory_SixBadges,
+    sShopInventory_SevenBadges,
+    sShopInventory_EightBadges
+};
+```
+
+### Make the file recognize the item definitions
+In the same file, add `#include "event_data.h"` at the top of the tile (above `#include "event_object_movement.h"` is a good spot)
+
+### Make the game load our new item data
+Edit the function, `static void SetShopItemsForSale(const u16 *items)`, to the following
+```c
+static void SetShopItemsForSale(const u16 *items)
+{
+    u16 i = 0;
+    u8 badgeCount = GetNumberOfBadges();
+
+    if (items == NULL)
+        gMartInfo.itemList = sShopInventories[badgeCount];
+    else
+        gMartInfo.itemList = items;
+
+    gMartInfo.itemCount = 0;
+    while (gMartInfo.itemList[i])
+    {
+        gMartInfo.itemCount++;
+        i++;
+    }
+}
+```
+
+Finally, add the function `GetNumberOfBadges` somewhere above `SetShopItemsForSale` (directly above is fine)
+```c
+static u8 GetNumberOfBadges(void)
+{
+    u16 badgeFlag;
+    u8 count = 0;
+    
+    for (badgeFlag = FLAG_BADGE01_GET; badgeFlag < FLAG_BADGE01_GET + NUM_BADGES; badgeFlag++)
+    {
+        if (FlagGet(badgeFlag))
+            count++;
+    }
+    
+    return count;
+}
+```
+
+### Usage
+In any script, replace `pokemart <itemList>` with `pokemart 0` to load the items based on the player's badge count. And that's it!