If you are talking about the one in astro knights island, just push on the part that is blocking the sort of hallway and it will eventually cave in.
you use TM secret power in front of a bush or the indent on the wall to make a secret base.
where is the secret hideout on spy island
How do you get the map to the secret hideout on poptropica
Secret bases are hidden around hoenn its a hideout for you, all you have to do is find a big bush or a tree with vines or an indent in the wall and you use the TM secret power on it and a hole will appear or a vine inside is an area where you can use decorations to make your own secret hideout, if you mix records with friends they can battle you in your secret base and you can do the same if they did that.
go to the jagged pass and go walk down the pass then you should see a hole go in it and good luck!
You have to talk to one of those hikers underground and one will give you a drill thing. Use it on a wall and you can trade the berries in Flamora town to put things in your secret hideout.
you find a bush or a hole in the wall and get a Pokemon who knows secret power. then use secret power on the hole in the wall or bush and it will make a hole. you can go in and make your hideout.
in the moutain.
did wonder woman have a secret hide out
in the gym
The TM43(Secret Power) is needed to make a secret base/hideout. You can use this on special trees, indents in caves, and bushes.
This is highly debatable and open to hundreds of interpretations. It could be a sign that your secret hideout/passageway is going to be discovered or that you need to make a secret hideout/passageway.