Galeem

Galeem is the main antagonist of Super Smash Bros. Ultimate's World of Light mode, resembling a large yellow sphere covered with wing-like beams of multicolored light. In the opening, it is commanding a horde of Master Hands against the various playable fighters. However, it then absorbs the Hands, using them to unleash a devastating attack, which only Kirby manages to escape from by pushing his Warp Star to its limit. Everyone else is hit with snaking yellow beams of light, which imprison them within the eponymous World of Light, before the beams then continue outwards and cover the planet, turning everyone else into Spirits. The Spirits possess or clone the captured fighters, and Kirby ends up in the World of Light and must save them.

Its name likely comes from the onomatopoeia "gleam," often used in contexts relating to light.