|The haunted mansion that's shrouded in darkness is the perfect home for the Gruegloom. Grueglooms cluster together and try to consume you. So when they surround you, stay in the light!|
— Daroach, in Kirby Mass Attack
Gruegloom is an enemy appearing in Kirby Mass Attack. It is a floating skull-shaped creature which revels in the dark, taking on the appearance of a dark purple puff of smoke unless exposed to the light. The Gruegloom cannot be harmed while it is in darkness, and will eat any Kirbys it gets its mouth on. In the light, however, it is very vulnerable, and can be easily pummeled. Defeating it yields 500 points to the player.
A second variety of Gruegloom exists in Kirby Mass Attack which has a blue hue. These appear in swarms in various dark places, and will fade away when exposed to the light. They effectively serve as an intangible and motionless but deadly stage hazard which forces the Kirbys to stay in lit areas.
Gruegloom appears exclusively in Volcano Valley - Stage 6.
- Gruegloom is very similar to (and its name possibly inspired by) a much older video game monster called the Grue, which would eat anyone who ventured out into the dark.
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