Waddle Dee is the weakest and most common land-based enemy in the Kirby games, but in Kirby 64: The Crystal Shards, N-Zs took over that role and only one Waddle Dee is seen in the game. It briefly became a Waddle Doo after Dark Matter possesses it and he befriends Kirby after being freed, and joins up with the team along with Ribbon to recover all the Crystal Shards.
Referred to as "Ruler of the Underworld" or "Lord of Darkness", Dark Nebula was sealed in a Treasure Chest a long time before the events in Kirby: Squeak Squad, although how, why or by whom is not known. Apparently Meta Knight was the only individual who knew about this, as Kirby was led to believe that the chest contained his Strawberry Shortcake and Daroach stole it from Kirby, believing it to contain ultimate power. Daroach was correct in a way, as Dark Nebula was far more than he could have handled, and possesses him to become Dark Daroach. He is destroyed after the events in Kirby: Squeak Squad, using Daroach's Triple Star Cane.