What are the little hold on the walls?

Well If I'm thinking what your thinking there is a possible base with the tm secret power.

Little holes, 4 square trees, 4 square shrubs in high-grass areas, they're all potential secret bases that you can create using the Secret Power technique TM43 (or was it... argh i cannot remember) you can buy this from slateport market.

A secret base is very convenient, you can heal your pokemon and even have a laptop there to deposit/withdraw items, all the decorations you've been collecting till now are mostly for those bases (and the cool ones you get from slateport market.

I can play songs in my secret base with my mats XD), I once heard there are a total of 64 secret bases, but i never took the time to check them all out, they are all over the place!

A cool thing about this is that when you mix records with your friends, their secret base appears in your game, and you can go battle them ^^" isn't that cool?

Frank

When you say holds,do you mean holes?

And, are you talking about in the caves for the Regi's?If you are,that's Braille.

There are certain things you need to do to open up the cave walls.

If you can read Braille,you could translate it and figure out how to get the Regi's.

If not,go to the cheat section and, you will find the cheat how to get them.

If a pokemon of yours knows secret power, you press A on the hole, say yes and it's a serect base.