
If your preferred language isn't English, run the NonEnglish.bat file. Download and unzip the 7z folder for the Version and Build you want to play. This is a persistent option, you don't have to do it every time you want to play Nova Sun or Umbra Moon. Enable the option Enable Game Patching and press Start to save. Hold Select when booting Luma3DS (this is when you turn on the 3DS if you're using B9S or A9LH). Update Pokémon Ultra Sun or Ultra Moon to the latest version if you haven't already done so.
All 3DS models can install CFW using this guide.
To install, you need a 3DS running Luma3DS CFW. The Expanded Build is the most popular, since it increases the variety of Pokémon found in Alola. They differ in Wild Pokémon availability ( see differences below). There are four builds available of Supernova Sun & Penumbra Moon. Level-Up movesets to handle the increased level curve and add access to TM and Tutor moves (details). Evolution methods for Trade Evolutions and "Level up in a specific area/version" Evolutions. Item availability in Poké Marts and from special vendors. Wild Pokémon availability (in three different ways). Competitive hold items are much more available, a 6IV Ditto is available through an in-game trade (holding a Destiny Knot), Eggs hatch in one cycle, and Level 100 Memento Blissey battles are available in the Battle Buffet once the main story has been beaten. In all Builds, some features are designed to make preparing competitive teams much less of a hassle. In Supernova Sun and Penumbra Moon's Legit Build, everything obtainable is 100% legal and legitimate for real online battles or trades. Melee's 20XX Hack Pack which is designed to improve competitive players' ability to practice and grind.
Supernova Sun and Penumbra Moon's secondary focus is inspired by Super Smash Bros. The Elite Four and Champion are Level 100, and the player doesn't need to grind to equal that. Every Pokémon in Trainers' teams has a a proper moveset and many are holding items. Every trainer in the game has been edited, and the level curve expects use of the Experience Share, which means that the player levels up very quickly. The premier feature of Supernova Sun and Penumbra Moon is the ground-up redesign of Pokémon Trainers in the world to increase the game's challenge. Like the other Pokemon hacks, Rutile Ruby & Star Sapphire and Nova Sun & Umbra Moon, their main purpose is to provide a more challenging game experience while not artificially limiting the player.
Pokémon Supernova Sun & Penumbra Moon is a ROM hack for Pokémon Ultra Sun and Pokémon Ultra Moon on Nintendo 3DS.