HOW DO YOU get your penguin on Club Penguin elite force?

You can't do it by yourself. You need someone in the force to give you an invitation then you will be able to do the test, which consists of hiding from the camera, going onto a green square, racing to a red square and not stepping on a trap. If you get 2 of these elements right, you will become a Elite Penguin Force Member. And, if you ask the question,"If you need an invitation from an existing Elite Force Member, how did the first person to get in the Force get in?" then it is a very good question and I honestly can't answer that, unless there used to be another way to get into the force, or if Club Penguin themselves gave someone an invitation.