1. Dress up as Harry Potter, get a fake wand, and shout 'Silencio!' at that Exploud muggle.
2. Give Giovanni a lot of ice type Pokémon and then summon a Decidueye. make it look like it's about to shoot, but actually make it hit the wall a lot above him. Have friends come and crowd around you two yelling.
3. Throw a Pokeball at a Mimikyu and say, 'Aww I thought you were an awesome Pikachu....'
4. Throw every evolution stone at an Eevee in front of a strong, kind Pokémon like Goodra.
5. Grab a Clefable and say, 'If you wanna get better, GO HOME!' in front of a group of Clefairy.
6. Catch an Alola Form Sandslash and give it Red shoes. Tell it to use Extreme Speed and Quick Attack. Catch a Vulpix and say, 'Its a reunion!'
7. Get a Swampert, dress up as Draco Malfoy, get a wand, and point at the Swampert and say, 'Filthy Mudblood.'
8. Catch a Mimikyu and a Pikachu, and tell the Mimikyu, 'Why can't you be like your brother?'
9. Tell a Mimikyu you need to wash his clothes.
10. Make a Volcarona, Darmanitan, Hydreigon, and Tyranitar battle.
11. Have a Ratata talk to a Serviper in front of some Raticate.
12. Tell Harriyama to go on a diet, and then tell your Snorlax he is perfect.