Solar Fusion Energy and Lunar Fusion Energy are a key part of acquiring Necrozma’s Dusk Mane and Dawn Wings forms in Pokémon Go. As well as having the required Pokémon (Necrozma and either ...

Necrozma's role was expanded in Pokemon Ultra Sun and Ultra Moon to include a feature that allowed it to fuse with either Solgaleo or Lunala to create its Dusk Mane and Dawn Wings forms.