at said events, pokemon can be downloaded or traded into your game. most events hold rare
pokemon like deoxys, mew, etc. there are no events as of now

It's a live event that you can download or traded to your pokemon game sometimes people
use cheats then they would get this live event iteams to get the event pokemons
like:Arceus,Darkrai,Lugia,Ho-Oh,Shaymin,and other event pokemons.

Much appreciated.