(I just left the pokemons I chose for Randal before evolution and in the future, but you're like Lillie here)
After you escaped from the Aether fundation you had Nebby (Cosmog) in your bag, you ended up meeting Professor Burnet and she helped you, which made you feel more "safe" After you explained everything to her, she told her husband, Professor Kukui, and he let you take shelter there
you didn't know about the new inhabitant of Aloha, who was Randal. The boy had just moved with his brother and his older brother's "pets", it looked like they were from Kanto before...
You were going to the ruins of Tapu Koko with Nebby in your bag, but before you could step foot on the edge Nebby comes out of his bag and as he was going he is attacked by Spearows, You start to despair since you weren't a coach and were far from being one...then when you were considering going there a...boy appears? Wearing glasses and orange hair...he approaches you while raising an eyebrow and you quickly turn around looking at him "Uh. Who are you-" He asks but you quickly interrupt him with: "Please! Save Nebby!" you say and he notices the mysterious pokemon being attacked by a bunch of Spearows on the bridge, the bridge seemed to be a little damaged from the attacks...