Metamorphosis

The Metamorphosis (メタモフォシス) is an alien-like Unversed that appears in Kingdom Hearts Birth by Sleep, serving as a boss battle for Ventus. It appears in Deep Space, attacking Ventus as he travels in-between worlds. It later sneaks aboard the Grand Councilwoman's massive spaceship, Ventus giving chase. The Metamorphosis causes the ship's engine to go out of control; in response, Ventus confronts it in battle and defeats it with the assistance of Experiment 626.

Story
As Ventus travels in-between worlds, he is attacked by this Unversed. Though he manages to defeat it in battle, it escapes into the Grand Councilwoman's spaceship where it heads straight to the engine room causing the ship to go out of control. In response Ventus tracks it down and defeats it with Experiment 626' assistance.

Appearance
The Metamorphosis is an alien-like Unversed with a jellyfish shaped body. It has three tentacales, a zigzag shaped tail, and a very small face. The Unversed emblem is on its chest

Abilities
The Metamorphosis has the ability to drain energy out of objects with its tail. It can use its three arms to attack with a spin. The Unversed can also spin around shooting electricity from its tentacales. It may also shoot a laser from its tail. It also posses the ability to turn invisible to elude foes when in desperate need.

Strategy
The main objective of this battle is to defeat the Unversed while making sure the engine's damage meter stays low. The boss will occasionally latch onto the engine and drain its energy, causing the meter to rise. If the meter reaches the top, it's an instant Game Over. When the boss is latched to the engine, the only way to dislodge it is with the reaction command Astro Shot with Stitch. For the most part it mainly uses physical and Thunder attacks, and when in desperate need, turn invisible to elude Ventus. But, overall,it isn't a too difficult opponent so long as the player pays attention to the damage bar and uses reaction commands when possible.