You will need friends, one a bug. Stand on the X's in front of the rock, and the rock will start to shine out from behind it and then you click on it. The secret room will show!
Its somewhere
Click your spy phone in the corner of the screen while playing 'The Secret of the Fur' in Club Penguin. Click Tools. Then when the comb appears, click on the comb.
in the forest the click the big rock
You have to become a member of Club Penguin first! Then go to the Stage and click on the Backstage door. Its Easy.
click on the big M on the top right corner of your screen when u are playing club penguin and click become a secret agent and answer the questions and then if u answer them correctly u will be a secret agent
go to the stage and click on the box of costumes
click the piano that's all you can do
Basically, it's outside the puffle shop/the stage and it is a grey circle. Click on it and you will arrive at a swimming pool. This will earn you a stamp.
go to the stage and click on anything you can. when your done click on the painting, then on the safe, then on the ruby!
you go on an item catalog and click the background of the page until there is a hand and then you click :)
Yes there is a secret mission on Club Penguin.
go into the top right corner and you can walk on the balcony