There are 2 different keys
1 of them is for Rockhoppers secret room (Captains quarters)
The other one of them is for underwater room (Found in secret task for Black puffle rescue) (Look on Club Penguin cheats for more info)
u need the key to get in (in rockhoppers journal at book room). it is under the migrator deck.
Well you go to rockhoppers book in the coffe room upstairs
it is in the book of rockhopper in the book room
underneth the pile of snow
The only thing you can find and keep is the key to the underwater room
You completely finish the puffle game and you get a key.
because you stink
Next to the Gadget room and the lock code is key.
You Go to rockhopper's ship and then you go downstairs of the ship and there will be a room and it will let you in only if you have the key.
If you are a member of club penguin and have a key to the door, u can go into the door at the right. Inside, there is a underwater mine that u can get gems& a new background.
You gotta go to the bottem. You need the key to get in. The key is at the book room. Go to the books and click rockhopper's journal. Flip to the last page and you will find the key, then you can go in the headquarters.
I dont know and i dont care! Figure it out