Walkthrough: Just as in Pokemon Sun & Moon, the game will begin with Professor Kukui video chatting your player, the same who will soon be moving to The Alola Region with their mother. He will ask you to pick between four different avatars for each gender, and then he'll query your name to get your passport started. After given him this information, the call will end and your player will rise from their computer, the camera zooming on a pamphlet about the work Lusamine is doing in the Alola Region with the Aether Foundation at Aether Paradise. These prologue cutscene will then begin to roll...
Again, just as in Pokemon Sun & Moon, the prologue will begin with a mysterious girl (who you will quickly learn to be known as Lillie) running from two characters in all-white uniforms (who you will later find are Aether Employees). As she continue to run, you will see the girl is holding a larger bag with something glowing on the inside. Before long, the girl will come to a dead end in the form of two more characters blocking her path. These two are wearing different outfits than the Aether Employees, ones of more futuristic design. One of these two characters will begin to approach the girl to take what's in her bag. However, the thing within her bag (the same you will later find out is the Pokemon called Cosmog) will begin to glow, transporting Lillie and itself straight out of the building and far away.
The Main Menu will then appear, and your adventure will begin with your character and their mother arriving in The Alola Region.