Dark Matter

Dark Matter is a recurring antagonist in the Kirby franchise. He makes his first appearance in Kirby's Dream Land 2, where he appears as both the main antagonist and final boss. Dark Matter frequently takes on two different appearances. His primary form resembles a black sphere, which is adorned with some petal-like appendages, and he has a single eye in his center. Dark Matter's other form is somewhat humanoid, as he has spiked, black hair, wears a cape and a visor, where one can see his small eye, and he carries a sword.

Dark Matter is a force of negative energy, as he lives a lonely existence. He is jealous of Dream Land's lifestyle, and often targets it to recreate Planet Popstar into a dark world devoid of happiness. Dark Matter has the ability to possess other characters, most notably King Dedede.

Kirby's Dream Land 2
In Kirby's Dream Land 2, Dark Matter destroyed the Rainbow Bridges connecting the Rainbow Islands of Dream Land. He took control of King Dedede and locked himself away in Dark Castle, plotting a future of darkness for Dream Land. In order to fight Dark Matter, Kirby needs to collect all of the Rainbow Drops and defeat King Dedede. After this, the Rainbow Drops form into the Rainbow Sword. Dark Matter leaves Dedede's body and flies high into the sky, and Kirby follows after him.

Dark Matter is first seen as a floating eye with spiked hair. When the final battle starts, he assumes his Dark Matter Blade form. Dark Matter attacks Kirby by swinging his sword at Kirby, charging his sword at Kirby, shooting lasers from the tip of his sword, and throwing black balls at him.

In the second phase of the battle, Dark Matter appears with projectiles surrounding it. It shoots black lasers in every direction, throws its projectiles which follow Kirby, and shoots black lightning to attack.

Kirby's Dream Land 3
In Kirby's Dream Land 3, Dark Matter is the secondary antagonist. He teams up with Zero in hopes of conquering Dream Land. Dark Matter appears in his primary form throughout the game. Similar to the previous game, Kirby has to collect every Heart Star to form the Love-Love Stick before he can fight Dark Matter. The battle against Dark Matter takes place in the Hyper Zone, and is fought largely the same as in the second part of his boss fight in Kirby's Dream Land 2.

Kirby 64: The Crystal Shards
In Kirby 64: The Crystal Shards, during the boss fight against Adeleine, one of her paintings is of Dark Matter in his primary form. His only attacks involve dropping orange projectiles while above Kirby or flying around in an ellipse to try and ram into him.

Kirby: Right Back at Ya!
Dark Matter does not appear in any of the aired Kirby: Right Back at Ya! episodes, although it appeared in the unaired pilot as one of the monsters created by Nightmare.