Oops! I forgot to post about these unreleased items. (Thanks to Nimp3 for the reminder) The first unreleased item is a neck item and called the Tame Arctic Fox. It looks like this. (so cute!!!!)
UPDATE: Thanks to @IceLabel, here is what it looks like on your penguin:
The second item is the Prehistoric Hammer Pin – a stick/slingshot and a rock . I don’t totally know if it’s actually supposed to be a hammer or a slingshot. Which do you think it is?
The third and final item is the Bone Gray Togs. It is listed as a free member item. UPDATE: Here is how to get it.