Traveling north on route 111 (north of the desert), you should see a boy (man?) looking at a tree. He will give you the TM for Secret Power. Give secert power to a pokemon and now you should be able to make secret bases!
Now simply look at any large tree, bush, or cracked wall and use secret power! And there you have it. Your own secret base.
You can put plants in your secret bases in emerald
they are secret bases you need to teach a Pokemon secret power first to use them
BBBBBBBBUUUUUUUYYYYYYY SOOOOOOOOMMMMNMMMME BBBBBBBBUUUUUUUYYYYYYY SOOOOOOOOMMMMNMMMME
Loose trees, dents in rocks, and piles of grass are where you can build secret bases in Pokemon Emerald Version.
There are secret bases in Pokémon Ruby Sapphire and Emerald. In Diamond Pearl and Platinum, you have underground bases.
Those are secret bases to create one use the move secret power.
Those are secret bases to create one use the move secret power.
Other than secret bases the best spot is the Pokemon league.
The Red Tent is a decoration item in Pokemon Emerald for your Secret Base. There are many places around Hoenn that you can turn into a Secret Base. Note that most bases can only be caves or tree-houses.
Those are secret bases. Just like those big trees. You need Secret Power to activate it though.
how to get all the tickets in Pokemon emerald?
tm43 in emerald is secret power