If you go through the dessert in Pokemon emerald, Sapphire, or ruby, you'll see a boy standing next to a tree. Talk to him and he'll give you the TM Secret Power.
Chat with our AI personalities
tm43 in emerald is secret power
You can't, unless you mean secret base. You have to have a Pokemon with Secret Power. Use Secret Power in front of a tree or an indention in rock.
they are secret bases you need to teach a Pokemon secret power first to use them
Get the TM secret power teach it to a Pokemon then find either a tree with vines, an indent in the wall or a big bush use secret power on these to create your own secret base.
Those are secret bases to create one use the move secret power.