As Raids are constantly being switched in and out of Pokemon GO with the coming and passing of various in-game seasons and events, there is usually a limited window of opportunity for players to participate in, defeat, and potentially capture Raid Bosses. As Raid Bosses are often some of the most powerful Pokemon in the game, they can not only be very tough to go up against but also make brilliant additions to your team for further PvE and PvP battles.