Kojiro operates as part of Team Rocket with Musashi and Nyarth during the special. The trio surveils the Mirage System demonstration at Dr. Yung's laboratory castle, aiming to steal the technology. Concealed during the initial battle test featuring a Mirage Aggron, they monitor events undetected. After the Mirage Master hijacks the system and captures Dr. Yung, Kojiro and his partners infiltrate the castle basement. There, they cross paths with Satoshi and Kasumi during the latter duo's own infiltration, sparking a standoff. Security cameras alert the Mirage Master to their presence, prompting an immediate deployment of Mirage Pokémon to their location. An explosion erupts amid the clash, violently propelling Kojiro and his teammates away from the castle.