dark nebula

The true antagonist and final boss of Kirby: Squeak Squad. Its existence remains completely unknown until the endgame, where it is revealed that Meta Knight has kept its prison (a treasure chest that was thought to contain Kirby's strawberry shortcake) in captivity. Dark Nebula is a one-eyed purple star surrounded by dark aura.

When Daroach stole the chest upon Kirby defeating Meta Knight, Dark Nebula immediately possessed the Squeak Squad leader and proceeded to carry out its evil plans. Realizing his mistake, Kirby wielded the Triple Star and promptly laid the smackdown on the dark lord, saving the day once more.

It is heavily implied that there exists a connection between Dark Nebula and Dark Matter-related entities, especially with flavor text provided by a Japan-exclusive handbook from Kirby's 20th anniversary. This would explain its possession of Daroach, its association with darkness, and it having one eye. This relationship is officially kept ambiguous, however.