Brock serves as a mature and reliable traveling companion throughout the events in Crown City. His background includes prior experience as the Pewter City Gym Leader, demonstrating leadership and Pokémon strategy. After this role, he pursued a career as a Pokémon Breeder before training as a Pokémon Doctor, reflecting his consistent dedication to Pokémon care.

He fulfills practical support functions during the journey and crisis. This includes navigating the group through unfamiliar territory, such as finding a shortcut to reach Crown City for the Pokémon Baccer World Cup tournament, and explaining the tournament's rules and significance to others. His habitual preparedness is evident through carrying essential supplies, navigation tools like maps, and survival knowledge.

During the conflict involving the rampaging illusions created by Zoroark under Grings Kodai's coercion, Brock participates in efforts to assist Zorua and uncover Kodai's schemes. He aids the group's infiltration by following journalist Karl into the sealed-off city section via the sewer system. His observational skills, honed through experience, allow him to discern Pokémon emotions and intentions, contributing to group decisions.

While not primarily engaged in combat during the major battles against Kodai's forces, he is present during confrontations and supports the group's objectives focused on protecting Pokémon like Zorua and Celebi and thwarting Kodai's plan to absorb the Time Ripple's power. His character remains defined by maturity, responsibility, and a supportive role centered on group welfare and practical problem-solving.