You will get to access the place behind the door in the Mermaid Cove.
be a member and go on black puffle rescue get the key and unlock the door /this may take a while/.
There is no cove on Club Penguin DS.
The mermaid cove's real room name is the 'Hidden lake'. So you can teleport there, you can go there through the ladder under the rock at the forest, or you can go to the room on the right of the Cove mine.
There isn't a secret room at the cove in Club Penguin
it was the cove PS my club p name is roody08
To get the key to the door on Club Penguin in the Mermaid Cove, you have to be a member and play Puffle Resuce. Then, choose the black puffle. Then, you stay where you are. Youw ill see a huge shadow, you must follow that and collect the air bubbles. It will lead you to a green area, then follow it until you find stiars. Onc eyou are down them, you collect the old key.
cove
in the cove.
The pink puffle on Club Penguin is at the Cove on the bottom left.
There is none sorry :)
it is in the cove on clubpenguin
Which wave? You can surf at the Cove.