>I was on Serebii looking at the Items page I saw the Poke-ball (Cherish Ball) again.I always wondered how to receive one but never found any thing.How do I get one if they really do exist?
They do exist.
They can only be found holding Pokemon that you receive from events. The only way to get them ingame is by hacking.
They are the Pokeball that event pokemon come inside of.
The Poke Ball that Virtuoso Victini and other events of unique Pokemon come in.