Pokemon Legends: Z-A Guide "Side Mission 025 - Trubblesome Patrons"

This one is stupid simple. You'll meet a woman named Fumi outside her cafe with a couple of Trubbishes. She explains that they got addicted to their food and needs them led elsewhere as, having creatures that live off eating trash outside your restaurant is a bad look.

She gives you something to lead them away and it's an item called "Tasty Trash" which, girl, fire your PR guy.

Anywho, all you need to do from here is go for a slow walk through the alleyways and let the three follow you, letting them get caught up if they get too far.

Get the Pokemon to the trash can at the end of the alley and you're good!

Mission complete! Enjoy your 1200 Gold, 2 Rare Candy, and 5 Dusk Balls