River City: Tokyo Rumble with FREE Limited Edition Kunio Keychain Limited Edition River City: Tokyo Rumble Kunio keychain. Play as Kunio, Riki, and other famous fighters from the River City series. Take on jobs to earn extra cash, special moves, and more. Take a break from the main story to fight in a 4-man Rumble or Dodgeball match. Take on your friends using Local Play and Download Play.