Penguins,

I have heard a lot of talk about being a ninja penguin. You can do it if you download a hacking program, and you will be banned forever for hacking. Here is what the CLUB PENGUIN OFFICIAL BLOG said:
Where is the ninja?
That is a secret that can not be revealed until we launch. There will be a ninjas, but it will be more difficult to become a ninja and will involve the secret room. For now, just make your penguin black and pretend.

See, there will be a ninja in the future, but not now!!