As the beast that appears at the climax of Ultra Sun and Ultra Moon, taking Nebby from Lillie and fusing it to become this gigantic, four winged, Psychic/Dragon-type that gains the Totem Aura, and has all its stats boosted. At Level 60, with four dangerous moves in Dragon Pulse for Dragon-type STAB, Smart Strike and Power Gem for two of its particular weaknesses (and certain other types), and its signature Psychic-type Photon Geyser, a very powerful move that says screw you to your Pokémon's abilities, a built-in Expert Belt for its ability, and astonishing 97/167/97/167/97/129 base stats BEFORE the aura, this thing had many players puzzled when they first fought it. Especially to anyone doing a Nuzlocke of these games, who many had their run suddenly cut short, and to those coming up to it requires them to seriously strategize. And it comes with perhaps the most astounding battle theme in the franchise, for that. And after you beat Gladion at Mount Lanakila, you can even use it yourself, and it has its own signature Z-Move, Light That Burns The Sky, with an animation that must be seen to be believed.
How did you beat this thing? Cheap strategies? Luck? And have you messed around with it yourself? Discuss!