You play Puffle Rescue on the black puffle level and at the beginning when you save the first puffle, a giant squid will come over you. Follow the squid and bubbles will come out of him and the bubbles give you air. He will lead you to a hidden staircase that is the underwater room. The key is located in it called the "Moss Key".
You Follow The Shadow And Get The Bubbles To Fly Up
Play puffle rescue on the black puffles and find the key on the first level
you collect all the black puffles and at the end there should be a key to collect as well beware the big squid
you find it at the dance club
the game in the mine shack not cart surfer but somthing else it was like this cool penguin saving puffles
at the black puffle rescue at the mine
use the black puffle on the next mission.
by joiing animal jam or minecraft
On Mission 6, the black puffle releases you from the cage. You don't need a key.
black puffle rescue game.find it.open the door.
You will get the key when you have rescued the black puffle in puffle rescue three times it does not work
go on puffle rescue on the black puffle and follow the squid
Log onto the official club penguin website at http://www.clubpenguin.com and click on the 'TOYS, GO SHOPPING' icon. Here you can purchase many club penguin novelties such as key ring puffles to the official Club Penguin DS game. Most of this stuff you can't find in Australia, so either buy it online on the site or hop onto e-bay.