Skully

Skully is a regular enemy in Kirby Mass Attack. They are Necrodeus' creations. Skullies are usually seen when Kirby obtains a Skull Key in any level, which teleports him to an intermediate room with numerous Skullies, one of which is carrying a Skull Treasure Chest. If Kirby manages to nab the red one with the chest, the rest disappear and the chest (usually containing a Medal) is unlocked. When Skullies mature, they become Skullions. According to Daroach, this process takes 100 years; implying that the Skullies are immortal.

Skullies feature in the Sub-game Strato Patrol EOS, where they either try to snatch Kirbys or powerups away, or come floating with one in their hands. Shooting such a Skully down adds one Kirby to the total Kirby count.

Appearance
Skully appears to be a white, floating humanoid skull permanently sheathed in a black cloud. When they attack, the whole of their bodies flash red. Skullies which carry treasure chests have red skulls rather than white ones.

Trivia

 * Skully bears a resemblance to the Pokémon Duskull.