The Legendary Challenge Chapter is the fifth Battrio O series of disks. This set focuses upon no set Pokémon but rather features many Legendary Pokémon with a new record of 8 Master-Ball Pokémon. This set contains the same mechanics as the previous sets including the new mechanic of the discs having attacks of a different type to the Pokémon. This set also includes a secret disk, labelled with a star.
