Locate the Supernova Sun v1.0.5 Expanded zip file from the official project threads on PokeCommunity or the developer's Google Drive.
is widely considered the definitive way to play, as it significantly increases variety by making every non-Legendary Pokémon species available before the Elite Four. Key Features of the Expanded Build Massive Variety download pokemon supernova sun v105 expanded link
If you are a veteran player bored of the base Ultra Sun , Locate the Supernova Sun v1