1: Hau and Hala
They are riding Tauros together. I couldn't find an image of this one.
2: Ilima and Gumshoos
3: Olivia, Mallow and Lycanroc
4: Lana and Wishiwashi
5: Kiawe and Marowak
6: Sophocles, that other guy, and Togedemaru
7: Acerola and Mimikyu
I couldn't find this one either, but she and her kids are dancing around Mimikyu.
8: Nanu and Persian
9: Hapu, Mudsdale, and Mina
10: Guzma and Golisopod
11: Faba, Wicke, Aether Employees, and Aether Pokémon
12: Plumeria, Salzzle and Team Skull
13: Gladion and Silvally
14: Kukui, Burnet, and Rockruff
15: Lillie and Nebby (Lunala in Moon/Solgaleo in Sun)
Image source.
Video compilation.
