The Simple Symphony Online Competition – which revolves around Pokémon that have only one type – is now underway for Pokémon Ultra Sun and Pokémon Ultra Moon players. The competition is currently running until Sunday, January 27, 2019 (23:59 UTC). Trainers are limited to 15 battles per day, with unplayed battles carrying over to the next day. All qualified participants in the Simple Symphony Online Competition will receive 50 Battle Points. Players must complete at least one battle to qualify.
Source: Pokémon Global Link