How to interact with Apricorn Trees

Adding a new apricorn tree

To add a new tree, first increase the tree count and expand the tree list in include/constants/apricorn_tree.h.

Note that each tree will take a bit in the savegame’s SaveBlock3 struct so increasing APRICORN_TREE_COUNT breaks the savegame. Due to this, pokeemerald-expansion doesn’t have any trees set up by default to prevent breaking downstream savegames. The trees support random yields and properly use plural case on plural yields.

#define APRICORN_TREE_NONE 0

-#define APRICORN_TREE_COUNT 0
+#define APRICORN_TREE_ROUTE101_RED_TREE 1
+
+#define APRICORN_TREE_COUNT 32

Then list its data in src/data/apricorns.h.

const struct ApricornTree gApricornTrees[APRICORN_TREE_COUNT] =
{
    [APRICORN_TREE_NONE] =
    {
        .minimum = 1,
        .maximum = 1,
        .apricornType = APRICORN_RED,
    },

+   [APRICORN_TREE_ROUTE101_RED_TREE] =
+   {
+       .minimum = 1,
+       .maximum = 1,
+       .apricornType = APRICORN_RED,
+   },
};

Finally, just place your new tree using Porymap. Similarly to berries, the Sight Radius / Berry Tree ID field is used for the tree’s ID.

Add a new apricorn type

After you created your new item, simply expand the ApricornType enum in include/constants/apricorn_tree.h.

enum ApricornType
{
    [...]
    APRICORN_BERRY_MARANGA = ITEM_MARANGA_BERRY,
+    APRICORN_BROWN         = ITEM_BROWN_APRICORN,
};