May as well take the chance and add a very important note for item_expansion users, since it's relevant to the choice given at the end

1 files changed, 33 insertions, 0 deletions

diff --git a/Infinite-TM-usage.md b/Infinite-TM-usage.md
index f58ffb3..aa5b267 100644
--- a/Infinite-TM-usage.md
+++ b/Infinite-TM-usage.md
@@ -236,3 +236,36 @@ And that's it! TMs are now reusable just like in Gen 5!
 ![](https://i.imgur.com/zA0lj2E.png)
 
 Alternatively, see [this commit](https://github.com/LOuroboros/pokeemerald/commit/6f69765770a52c1a7d6608a117112b78a2afcc22) for an implementation by Karathan that turns TMs and HMs into a bitfield, freeing up some saveblock space. This saves space, but is slightly more complex.
+
+**[Item_expansion](https://github.com/rh-hideout/pokeemerald-expansion/tree/item_expansion)** users, please keep in mind that if you decide to use the above refactorization of TMs and HMs, you will need to modify the `CanMonLearnTMTutor` function located in `src/party_menu.c` like this:
+
+```diff
+static u8 CanMonLearnTMTutor(struct Pokemon *mon, u16 item, u8 tutor)
+{
+    u16 move;
+
+    if (GetMonData(mon, MON_DATA_IS_EGG))
+        return CANNOT_LEARN_MOVE_IS_EGG;
+
+    if (item >= ITEM_TM01)
+    {
+-       if (!CanMonLearnTMHM(mon, item - ITEM_TM01 - ((item > ITEM_TM100) ? 50 : 0)))
++       if (!CanMonLearnTMHM(mon, item - ITEM_TM01))
+            return CANNOT_LEARN_MOVE;
+        else
+            move = ItemIdToBattleMoveId(item);
+    }
+    else
+    {
+        if (!CanLearnTutorMove(GetMonData(mon, MON_DATA_SPECIES), tutor))
+            return CANNOT_LEARN_MOVE;
+        else
+            move = GetTutorMove(tutor);
+    }
+
+    if (MonKnowsMove(mon, move) == TRUE)
+        return ALREADY_KNOWS_MOVE;
+    else
+        return CAN_LEARN_MOVE;
+}
+```
\ No newline at end of file