The Players Cup 4 was an online tournament where players around the world could take part to win prizes. During the stream, a Beast Ball was distributed to viewers and players around the world, via serial code PC4F1NALSBEAST.
As of LGPE, wonder cards are no longer stored in saves. As such, players will not be able to inject this event into their save using PKHeX.
Format Ver.2.1.0-1b, Post Updated Date:20210731_2244