Light is the source of its energy. If it isn’t devouring light, impurities build up in it and on it, and Necrozma darkens and stops moving.
Stats
Attack: 107
Defense: 101
HP: 97
Sp. Attack: 127
Sp. Defense: 89
Speed: 79
Profile
Type: Psychic,
Ability: Prism Armor,
Egg: Undiscovered,
Gender: Genderless
Weight: 230 kg
Height: 2.4 m