Mythical Pokémon Keldeo wishes to join the Swords of Justice, a group of Pokémon traveling around the world, helping out those in need. To do so he must first harness the power of his horn and learn the move Sacred Sword, and he decides to challenge Kyurem, a Legendary Dragon residing in an abandoned mine located within an icy crater. Confident as he is at first, it soon occurs to Keldeo that he is not yet ready for the fight. Meanwhile, as Satoshi and his friends travel across the Unova region, they stumble across an injured Keldeo. At the same time, Kyurem goes on a rampage, drawing energy from other Legendary Pokémon and disturbing the balance of power in the entire region. Now backed by his new friends, Keldeo must overcome his weaknesses and face Kyurem once again, now with the fate of the world at stake. Earth’s seven greatest heroes unite against the threat of an alien invasion and decide to remain together to defend Earth against attacking aliens, sorcerers, super-villains, and any other threat that might arise. Among their number are the Martian Manhunter, last survivor of Mars; Superman, the super-powered last survivor of the planet Krypton; Batman (the Dark Knight Detective); Green Lantern, wielder of an alien Power Ring; The Flash, the Fastest Man Alive; Hawkgirl, Winged Wonder and policewoman from the planet Thanagar, and Wonder Woman, Princess of the Amazons.