Necrozma is a bizarre Pokémon whose body appears to be constructed out of black crystalline material; its disproportionately large arms have three claws jutting out of them, as well as a single large whitish crystal protruding backwards from each arm. Its small legs bend backwards like a bird's and have three toes each. However, it does not seem to use them as it can naturally levitate through unknown methods. A single spine juts out of each of its shoulders like a hook. Its head and torso are covered in spikes, and it possesses a collection of colored shapes in the center of its head where a face should be.
Necrozma was discovered dwelling deep underground, where it had been asleep for ages. Due to the peculiar nature of its body, the power it wields, and the rumors that it came from another world in the distant past, it is speculated that it may be related to the [[Ultra Beast]]s if not actually one itself; however, the International Police have no records of it ever emerging from an Ultra Wormhole so its classification is still uncertain. Despite being pitch-black, it constantly refracts light like a prism. Light acts as the source of its energy, and it can concentrate this light to perform its signature move,
[[Prismatic Laser ]]. It is known to be incredibly vicious, firing off laser beams at anything around it.