Cilan assists the legendary Pokémon Keldeo against Kyurem alongside two human companions. After finding Keldeo injured, the group resolves to save the frozen Swords of Justice and confront Kyurem. Cilan leverages his captured Stunfisk, utilizing its electric abilities to power an abandoned mine cart. He deploys this cart as a diversionary tactic, drawing Kyurem and its Cryogonal minions away from Keldeo and the main rescue effort. This forms part of a coordinated strategy where one companion secures aerial transport while another companion and Keldeo proceed on foot to the Swords of Justice.

Cilan is a Pokémon Sommelier, evaluating human-Pokémon compatibility with specialized expertise relevant to the mission. As a Fishing Sommelier, his skill in handling Water-types and fishing equipment facilitated Stunfisk's capture and use. His certification as a Science Sommelier reflects an analytical, evidence-based problem-solving approach. Proficiency as a Metro Sommelier, specifically regarding rail systems and vehicles, provided the practical knowledge necessary to operate the mine cart effectively during the Kyurem distraction. These combined skills enable his strategic contribution to the group's objective. His role remains supportive within the collective effort to aid Keldeo.