You know, I made a guide to collecting items thread, but although it got fifty views, no one replied. Now I understand why. I am a ghost, and no one can see me. :3
In that case, you won't see this reply, but heck, I'm a ghost. I'm doomed to repeat myself anyway, right?
TM 26 is in the secret portion of Wayward cave (the part you get to UNDERNEATH cycling road, not the cave entrance you can see). You'll need strength to get in there. Anyway, that's where it's found in-game. You can also obtain additional copies of it if you train a Pokemon with the Pickup ability to level 91 or greater, as they have a small chance of picking that TM up at those levels.
