What is the moss key for in Club Penguin?

Answer 1

I'll tell you this one. In the Hidden Lake (Under the rock in the forest), there is a door that has a big lock on it. Walk to the door and go inside. You've now gone into the Underwater Room. Put a comment below to say if this helped!!

Answer 2

the moss key is a member pin ONLY FOR MEMBERS and to get it is you have to go on puffle rescue on the black puffle on the first level when you get to the end of the place where the puffle was the giant squid appers follow it theirs bubbles to keep you up then you get to land you find stairs if you look around and when you go down the stairs yoou finish he game and go into a under water room and theres a pin witch is the moss key. REMEMBER ITS ONLY FOR MEMBERS OK.

hope this helps