Darkball

The Darkball is a Pureblood Heartless that is found in Kingdom Hearts and Kingdom Hearts: Chain of Memories.

Design
A Darkball Heartless, true to its name, has a spherical body that is pitch black and streaked with dark blue. Its glowing, yellow eyes are rather small. The inside of its mouth is blue, and the mouth itself is a jagged, toothy opening. It has three thick, black and blue tentacles with frayed, pink tips sprouting out of its body, two on its top and one on its underside. It closely resembles the Shadow Stalker of Kingdom Hearts II, although the Shadow Stalker has an overall smoother appearance and several smaller appendages.

The Darkball's name reflects its spherical shape and its status as a Heartless, a heart corrupted by the Darkness.

Kingdom Hearts
Darkball's are first introduced in Hollow Bastion. They appear to be more powerful than some. They also appear in End of the World, even more powerful, and yet again in the closing rounds in the Hades Cup.

Kingdom Hearts: Chain of Memories
Darkball's appear again in Kingdom Hearts: Chain of Memories first on Hollow Bastion as in the original, then on Destiny Island and finally in Castle Oblivion stronger and stronger each time they appear.

Strategy

 * Attacks
 * Reducing themselves to a small, purple cloud, allowing them to evade attacks, before expanding rapidly, causing damage.
 * Adopting a 'berserk' state, by which the Darkball rockets around in a restricted area, causing impact damage.
 * A charging chomp attack.

Darkballs are relatively easy enemies, and generally do little damage, thanks to the long pauses and low HP of this variety of Heartless. The Darkball teleports from one place to another, using a tactic similar to the more intelligent Invisible.