You can use them to decorate your base, they don't have any use other than that.
you need a Pokemon that knows secret power use that move to make your secret base
on sapphire/emerald this one boy gives you the move secret power. use it to make a secret base!
you go under ground and get the digger drill and use it to make a secret base
No there isn't,but there is a all dolls x95 code and a all furniture x95 code on Kode Werx.com!
In the Pokemon games for GBA, you use this move to make a secret base.
Around hoenn there are trees and bushes and little indents on walls on rocks these are secret bases use secret power on a tree with vines on it or on a big pile of grass or the little indents and you will open a hole when you go inside this is your secret base.
ireland
in lilycove city in the giant store on the floor before the top floor
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.
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 places you can make your secret base in how to do that you say use secret power on the indents to make a hole appear now you can create your own secret base.
There are secret base items called solid boards that you can use to cover those pesky holes in secret bases.