pokemon sun and moon things to do after becoming champion?
['Get Incinium Z, Decidium Z, or Primarium Z from Hau.', 'Get a Lucky Egg and TM90 Substitute from Professor Kukui in the Pokémon Research Lab.', 'Catch the four Tapu.', 'Catch the Ultra Beasts.', 'Go to the Battle Tree.', 'Get Cosmog.', 'Get Type: Null.']