You will find it after the Scientist steals the Sapphire on Island 6's Dotted Hole.
The password is: "Yes, nah, CHANSEY."
Answerto get the second password, you go to six island, and go to the dotted hole south of the island. At the end a dude will steal the sapphire your trying to get and tell you the second password. Then head to the rocket hideoutthanks i was stuck
im not sure off the top of my head what the passwords are but you have to ask the team rocket members after you defeat them in a Pokemon battle and that's how you get the passwords
after beating the team rocket executive the murkrow knows the answer and you need to follow it through the base to the door
The first password you will get from 2 team rocket grunts at mt ember (after you get national dex). Second is in dotted hole at island 6 when the man working for team rocket who meets you near the sapphire
You have to go get the Ruby, and one of the Rockets will tell you the password, and then go get the Sapphire, and the Scientist will give you the second password.
Once you obtain the Sapphire in Dotted Hole a scientist will take it from you then tell you the 2nd password for the Rocket Warehous which is Yes nah Chansey.
The game has a few glitches, unless your able to talk to the Team Rocket members in the 4th Island you cant find the 2nd Password.
ok first u must go to the island were you here the to rocket members talking to get the first password then go to the rocket hideout they talk about and use cut on the door to get the second password
slowpoke tail
to get the second password for the warehouse, you need to go in to the dotted cave in island 5. and the pattern of the holles are forward,left,right. to amazement you find the sapphire, then some random guy takes it and says that he is gong to sell it to team rocket then tells you the second password
One password is given by a rocket grunt in mt ember after getting the national pokedex upgrade, The second password is given by a scientist at dotted hole after getting the sapphire.