Metamorphosis

The Metamorphosis is an alien-like Unversed serving as a boss battle for Ventus in Kingdom Hearts Birth by Sleep. It appears in Deep Space, attacking Ventus as he travels in-between worlds. It later sneaks aboard the Grand Councilwoman's massive spaceship, Ven giving chase. The Metamorphosis causes the ship's engine to go out of control, later defeated by the combined forces of Ven and Experiment 626.

Video
http://www.youtube.com/watch?v=LeU4FnvxKRI

Trivia

 * The Metamorphosis is one of three Unversed to share its battle theme, the other two being the Symphony Master and Wheel Master. It is the only Unversed boss to have this battle theme in Ventus's storyline, however.