Official Parallel '24-'25 Challenge Campaign(Japanese: 公式パラレル'24-'25 挑戦キャンペーン) is an Official Parallel Data event for /Shiren the Wanderer: The Mystery Dungeon of Serpentcoil Island. It was released on December 27, 2024. Five winners will be chosen, and they will receive signed illustrations featuring one Monster of their choice, out of the Monsters featured in the game, excluding bosses. To participate, players must make a post on Twitter with the hashtag #2025年もシレン6 and a screenshot of their Adventure Result after completing the dungeon, using an account that follows the official Shiren account, between December 27, 2024 16:00 and January 5, 2025 23:59. Only players who live in Japan can compete and receive the prizes.[1][2] The Parallel Data itself can be played on the English version of the game regardless of the Japan only competition and its rewards.