Pick Up Pokemon
This is the list of pokemon that have the special ability called: Pick-Up. Pick-Up allows your pokemon to randomly find usually after battles.
The items they find depend on what level they are.
Some of the most common items you can get are Escape Ropes, Repels, Great Balls, and Potions. There is a big list of them so if you like, check out Serebii.net for more. I hope this helps! :)