After becoming the League Champion and defeating the final Hurrah Island challenge Prof. Kukui allowed Sun/Moon and others to travel to the Unova Region for a year and test
what they learned in Alola. Your rival Gladion followed and together you
chose new starters for the journey across Unova. Rumors say, Team Skull
has also been spotted in Unova. Sun/Moon was also granted permission to
enter the Regional Tournament at the PWT representing the Alola region
if they defeat the Unova Champion!