Also known as the Husk.

It is all that remains of the original dragon and is quite frankly, dumber than a brick.

It really only functions on a few things, eat, sleep, freeze anything that moves, and attempt to restore itself. It has lost it's ability to take on a human form or use telepathic communication.

However when me or Zekrom are fused with It, it does get those functions back. At the cost of us having to be stuck in mental limbo that is......