Pokémon Nova Sun and Umbra Moon are mods for Pokémon Sun and Moon. Like my Rutile Ruby and Star Sapphire hacks, their main purpose is to provide a more challenging game experience while not artificially limiting the player. The premier feature of Nova Sun and Umbra Moon is the ground-up redesign of Pokémon Trainers in the world to increase the game's challenge. 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. Every Pokémon in Trainers' teams has a hold item and a proper moveset. The end-game of the main story features trainers with Levels in the mid-nineties.

These mods are very expansive. In addition to Trainers, Nova Sun and Umbra Moon also feature edited:

Wild Pokémon availability (in three different ways!) Wild Pokémon hold items Item availability in Pokémarts and from special vendors Evolution methods for Trade Evolutions and "Level up in a specific area/version" Evolutions Harsher Level Curve: Balanced to the EXP Share! All-new Trainer teams, designed from the ground up, many featuring six Pokémon! All Captains, Kahunas, and other bosses have six Pokémon! Every fully-evolved non-Legendary Pokémon (and Mega Evolution) will be encountered in a Trainer's team during the main story! Totems are powered up and pack new strategies! Post-game Memento Blisseys added to Battle Buffet in Hau'oli City! Trainers are capable of EV Training their Pokémon!