Yes you can, you just have to go home, click on decorate, it will ask if you want to clean up your other base and say yes. Then go make another base.
in the underground.
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.
Stand at the front of the clump of grass and press A but you must have a Pokemon with you that knows the move secret power and it should ask you if you want to create a secret base there. Hope it helps :)
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.
you need a Pokemon that knows secret power use that move to make your secret base
You cannot make a secret base in Pokemon soul silver.
You cannot make a secret base in Pokemon soul silver.
Loose trees, dents in rocks, and piles of grass are where you can build secret bases in Pokemon Emerald Version.
you cant cover the holes in your secret base.
you teach a Pokemon secret power and you go up to a round tree, a hedge (the round type) or one of those random square holes in caves and use secret power!
use secret power on certain trees, bushes, caves etc. it will create a secret base
on sapphire/emerald this one boy gives you the move secret power. use it to make a secret base!