Koji Real name Gender Male Age ?? Hair colour Black Eye colour ?? Hometown Castro Valley Relatives Trainer Class Leader Leader of Castro Valley Gym Badge Fist Badge Specializes in Fighting-types Koji is Castro Valley's gym leader in Pokémon Brown. Retrieved from "https://rijon.fandom.com/wiki/Koji?oldid=4833" Categories: Characters Gym leaders Citizens of Rijon Adults Male characters Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.