Unlocks a mission for the Mythical Pokémon Darkrai and the Team Galactic Clothing Set.
The "NSP" and "RAR" portions refer to specific file formats used for Nintendo Switch software and compressed data archives. Meanwhile, "exclusive" usually refers to the rare Pokémon and special bonuses that players can only find under certain conditions in Pokémon Legends: Arceus . Understanding the Technical Terms: NSP and RAR