You beat the TRAINERS first then the doors unlock and you can go through them ^^
You have to get Kyogre and then go to the ciuty it is in and got to the chamber.
they are brail letters. you can look up brail letters online.
getting to Garyyou get the card key - 6th floor then u unlock any doors you see until you get to a hallway then theres Gary or your araval.
In Ruby and Sapphire, you have to fight the respective legendary before the doors open.
in some dungeons there will be doors you use the key on the doors while facing them
Go through the cave of origin.
You have to get Kyogre and then go to the ciuty it is in and got to the chamber.
ask google
go to dew fords n w ocean
Find the key at a under water cave
With the Galactic key you can unlock any locked doors in the headquarters.
The Petalburg Gym in the Pokémon Diamond and Pearl games is only accessible after defeating the first four Gym leaders. The doors are locked if the player does not have the badges from the first four Gyms.
Beat team Magma/Aqua (depending on the game) at wherever they are at this point, and then capture the legendary Pokemon of the game. Then the doors will open.
they are brail letters. you can look up brail letters online.
just head down to petalburg city and the gym will be unlocked. you have to choose a room to go into that has a certain stat on it. you can choose from two doors.
All the sets of dots are Braille Have a Pokemon use cut on the doors to get in. Follow the hole path up, left, right, down to "reach" the sapphire. A man will appear and take it so you need to face him in the now accessible rocket warehouse.
I think you have to push the 'unlock' button twice in order to unlock the doors.