You have to catch pikachu in the safari. Teach it strength and use it next to the hole. It should be filled up.
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 have to buy a wooden plank. I think you get one from the Lilycove Store. But only once they have a sale, go to the roof of the store and a lady will sell you one.
Go underground.
no
You need to steal the flag out of your friend's Secret Base underground, then go up to the PC.
you cant cover the holes in your secret base.
There are secret base items called solid boards that you can use to cover those pesky holes in secret bases.
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!
Holes don't fill things up, they empty it
Fill them up again.
First up need to beat the game, then go to lily cove city and buy boards.
The presidents secret base is in U.S.A the 'pentagon'.
Bondo.
You cant remove them, but when Lilycove Department Store has a clear-out sale, (which will only happen after you beat the Pokemon league challenge) you can buy wooden boards, which you can cover the holes up with and then walk over them.
I think you should learn your pokemon strength and use it against the holes. I just think that,because alot of people say that.
Please fill the ewer with water.
You cannot fight people in your secret base.