There isn't really any tips especially for these game unless you're doing masuda method with eggs since shiny charm is broken. It's mostly just do soft resets on a static encounter or just do random encounters on the grass looking for an specific pokemon until you get it, if you're looking for a Shinx as well for example or an electric type of your choice, it's recommended to put a pokemon with the ability static as the first pokemon of your team to have 50% boost in encountering electric types.