I found some things I missed...

First of all in the Rockhoppers Rare Items Catalog, Click on the X of the wall map.
Now there are three white puffle things. A white puffle is in puffle roundup. And also look at the picture where Rockhopper is walking Yarr in the captains quarters and there will be a whit puffle in the backround. Third there is a mysterious puffle in fun stuff at the start of the club penguin game. Now click on the new backround with puffles and look in the puffle furniture.