Non-canon warning: This article or section contains information that may not be considered an official part of the Metroid series in the overall storyline by Nintendo.
Phase Sprites are unused creatures from Metroid Prime 3: Corruption. They have a logbook entry, as well as animations and a textured model, but were for some reason never used in the game. The creature is composed of smaller sprites that orbit a Sprite Nucleus as they search for sustenance. They are described as having the ability to turn invisible, and to generate a burst of bright light that can temporarily short-circuit a powered system (possibly referring to Samus's Combat Visor).
The creature bears some resemblance to the effects used when Samus is fully charging the Nova Beam.
Logbook entry[]
Phase Sprite
Metroid Prime 3: Corruption
Morphology: Phase Sprite. Emits bursts of energy capable of blinding visor systems.
Phase Sprites travel in large collectives for safety. Each collective is spawned by a Sprite Nucleus--a larger, brighter Sprite that the others orbit as they search for sustenance. As a defense mechanism, they can render themselves invisible. If threatened, they will generate a bright burst of light and radiation that can temporarily neutralize sensors and powered systems.
Non-canon warning: Non-canonical information ends here.