You can find hidden clothes if you search around in the clothes catalog. They're in the strangest places too. Click here and there. Some hidden clothing include the green face paint, the viking helmets (the red and the super super SUPER secretive blue helmet...I won't give anything away), the green cloak, the green dragon costume (I don't think the blue one is there anymore...), and much, much more! Have fun searching for hidden clothing in the Club Penguin clothes catalog! They are hidden in different parts of the catalog when the catalog changes.
I suggest you make your mouse go over everything in the catolage until you can click on something and find them yourself. The Viking helmet
This is what I only know for April Fools Party (Pins) 2011.
Yellow Puffle - Mine Shack
White Puffle - Book Room/2nd Floor at the Coffee Shop
There's One in the boiler room now
Red Viking Helmet
First you have to go to club penguin cheats and it will show you hidden items if your a member you can buy the hidden items just type down on Google club penguin hidden items in the catalog and look through you will find it eventually. ThankYou xx :).....
books in the bookroom
the items that are hidden are always unknown, but the viking helmet is always hidden to find hidden items move your mouse around the page, when it turns into a finger click. o.k. :)
Go on Google and search: Club Penguin Items IDAnd then you probably find it :)
In the mine
Hidden lake
Use This Code:PUMPKIN1 on the club penguin "unlock items online".
they are hidden, apparently sense you can not find them
in the dojo
so u wanna know how to find recycable items on club penguin huh it's in the mine shack in the recycleing plant u will find it
try goggling it because they change when the catalogue change. or you can just randomly click around and try to find it yourself (not a smart choice).
well you can't really get to the old furniture catalogs but if you are trying to buy some things from there you can find hidden items in the current catalog try clicking on different items until you find something