https://www.gamespot.com/articles/pokemon-gos-ho-oh-available-now-worldwide/1100-6455230/

In addition to the new event, Pokemon Go also has new Pokemon Ultra Sun / Ultra Moon cosmetic items available now. Those 3DS games launched just recently, and we awarded them an 8/10 in our Pokemon Ultra Sun and Ultra Moon review. For lots more on the new games, check out this breakdown of the key differences between Ultra Sun and Ultra Moon.