Get from a guy on route 111, after the you can buy it at the slateport marketplace
every person or in this case power ranger have a secret.
Secret power is a TM you can buy in the celadon dept store.
You can go and buy it. Hidden power and secret power can be bought from a person (I don't remember where he/she is).
there is no secret entrance
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.
Secret Power is TM 43 in Gen 3 and Gen 4.
First u go to a bush or a square in the wall or a large tree an talk to it. Then use secret power. u will now have a secret base.
you can get it from somewhere....but you can also buy secret power (TM43) from the slateport market....the one on the right
after u get secret power and hidden power some guy in slateport market sells 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.
You get secret power from a boy standing in front of a tree outside fiery path, below Fallarbor town.
Go to route 111 and watch for a big tree. There you will see a man. Talk to him and voilà! You have secret power!