You need 2 passwords to open the door, there given out by two people. One is a rocket at mt ember he gives it to you when you get the national dex. The other one will appear when you try to get the sapphire in dotted hole he will steal the sapphire from you then tell you the 2nd password. Now press A on the door to open it.
Use the arrows to direct you to the northern area of the warehouse.
it's in Rocket Warehouse on Chrono Island.
There is a supernerd in the top right corner of the warehouse but the only way to reach him is by using the arrow panels to direct you over there.
The rocket warehouse is in five isle meadow guarded by three rockets. If your Pokemon are level 58 or above you should be able to defeat them.
use the arrows on the floor of the warehouse to get to the northern area of the warehouse.
i think its yes nah chansey and you get it in the dotted hole in island six
If you mean the Ruby and Sapphire, the Ruby is in Mt Ember on One Island and the Sapphire is given to you by a Team Rocket Member after defeating him in the Rocket Warehouse on Five Island.
If you are going after the Sapphire, then you go to Five Island and run through the Rocket Warehouse to get the Sapphire.
With the dotted holes in leaf green, that is where you get one of the gems to get inside the Rocket Warehouse. Just have a Pokemon that knows cut, go up to it, then press START, POKEMON, ???, CUT. It's that easy!
Train your pokemon to a higher level.
In the game corner
In the Team rocket werehouse on five island. I forget but I think you need to fight some rocket grunts before you can get to it.The upgrade can be found in the Team Rocket Warehouse in the Sevii Islands. You will need 2 passwords to enter, and it is found amidst other items in the floor panel puzzle that covers the majority of the warehouse.