ah poop, well i better undo it, thanks for finding that out

I have bad news for you about the reusable TMs. I patched my clean v10 E ROM using your patch to update my game. Then, when I used every useable item (even Poké Balls), they were also reusable.
Thinking that I did something wrong, I tested again the method I sent to you on both clean v10 E and USA ROMs. It seems that modifying that byte makes every item reusable.
Sadly, I'm far to knowing the solution of that problem. You may have to remove the feature (following the tutorial, but changing again the BD at 0x78452 in the ARM9.bin to 49. That will remove reusable TMs, but fix every item). If you had a backup before adding that "feature", it would be safer IMO.
I apologize about all problems caused by this, it was very imprudent of my part.

This is a great find thanks you so much! I will try to get them working immediately.

Sorry to bother you, but this can be interesting to you about reusable TMs in HG/SS:

-I followed this tutorial (https://www.pokecommunity.com/showthread.php?t=419989) on a v10 E ROM of Soul Silver (although it says for USA ROM, but the byte at the offset mentioned in ARM9.bin is the same). Reusable TMs work right, I hadn't found any bugs at the moment. Maybe, the only thing to consider is that you still can obtain more than one TM of a move and it is not possible to remove the amount indicator of a TM, just like gen 5 games did.

It is apt to you if you add this to HG/SS Golden Edition. I'm just writing to you because you seem interested about this, and to add this feature to your mod (if not, apologizes).