Here is the first one, it is what you will look like when you become a ghost on Club Penguin. You have no feet, and your penguin turns more transparent, kind of like a Ninja.
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The second image is of the special move you will be able to do when you are a ghost. It's a bit hard to explain but here it is, quite scary.
-Dino Boy7, Club Penguin Cheats
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Alright, that's all. So I don't know for sure if these features are actually what I called them, but they will be coming in some way to the Club Penguin Halloween Party 2012. I don't know if what I stated in this post can be 100% confirmed, it's just a theory I gathered from the new sneak peek. Thanks for reading, waddle on.