PK7: Unobtainable Ultra Necrozma - Unreleased/Beta PKM Gallery - Project Pokemon Forums

While this forme is accessible once you capture Necrozma, and gain access to the the N-Solarizer and N-Lunarizer, and also having a Solgaleo or Lunala in your team (for the fusion process), this forme, like Mega Evolution, cannot be maintained outside battle. How this file was obtained, was by us

PK7: Unobtainable Ultra Necrozma - Unreleased/Beta PKM Gallery

Necrozma, Project Pokemon Wiki

Mavin Ultra Necrozma GX 127/131

PK7: Unobtainable Ultra Necrozma - Unreleased/Beta PKM Gallery

Ultra Necrozma · Cosmic Eclipse (CEC) #164 ‹ PkmnCards

User Contributed PKM files - Project Pokemon Forums

Unreleased/Beta PKM Gallery - Project Pokemon Forums

Unreleased/Beta PKM Gallery - Project Pokemon Forums

SM USUM - Pokémon Secret Club Shiny Necrozma - Event Pokémon News