What do the souvenirs from my Pokémon GO buddy do?
Solution 1:
No, there is not a use or benefit to these souvenirs currently. There are some speculations as to what they might do in the future, but nothing has been confirmed by Niantic yet.
Solution 2:
Only one that has a benefit is the “Lone Earring” souvenir that gives the player earrings that match the souvenir
