Plot
The two films follow a similar plot with some major and minor changes, notably the Legendary Pokémon that appear and where they appear. In Black—Victini and Reshiram, Damon finds Zekrom under the castle to fulfill his ideals, while Ash finds Reshiram to find the truth. The roles are swapped in White—Victini and Zekrom. Damon has a Gothitelle in Black—Victini and Reshiram and a Reuniclus in White—Victini and Zekrom.
1,000 years ago, Victini, a Mythical Pokémon which can boost the power of other Pokémon, was friends with the king of the Kingdom of the Vale, who ruled over the People of the Vale. The people and Pokémon in the kingdom used an energy source called the Dragon Force to live in harmony with nature. The king's sons were accompanied by the black and white dragon Legendary Pokémon, Reshiram and Zekrom, but the princes became enemies leading to a war between Reshiram and Zekrom, who mortally wounded each other, transforming into stones and falling into a long slumber. The Dragon Force grew destructive, so to contain the energy, the king created a dark magical barrier around the castle using the Pillars of Protection to use Victini's powers to make the Psychic-type Pokémon move the castle known as the Sword of the Vale to the mountaintop where Eindoak Town now stands. The king used up his own magic power and died, and Victini was trapped in the barrier isolated by the Pillars of Protection. Over time, the People of the Vale scattered, leaving Victini inside the barrier. Eventually, the chaos within the Dragon Force subsided, the two princes were filled of deep remorse, and they moved the stoned Reshiram and Zekrom to a cave beneath the castle.
In the present, the vale has become inhospitable. Damon, a descendant of the People of the Vale, hopes to restore the vale using Victini's powers and reunite the scattered People of the Vale, based on his mother Juanita's wish during his childhood. He finds either Zekrom or Reshiram after hearing the dragon Pokémon's voice in the caves beneath the castle. Unaware that doing so would threaten the Dragon Force to destroy the entire world, Zekrom or Reshiram shows Damon how to move the castle and use the Dragon Force's energy.
At Eindoak Town's harvest festival, Pokémon trainers Ash Ketchum, Iris, and Cilan take part in a Pokémon battle competition. Damon's sister Carlita notices Victini has been giving Ash's Tepig and Scraggy power boosts. Ash offers Victini some of Cilan's macarons and he and his friends befriend Victini. The next day, Ash promises to take Victini to the ocean, but Damon then forces Victini to use its power to help move the castle and redirect the Dragon Force's power to the vale. Ash and Juanita try to stop Damon from harming Victini, but their attempts are thwarted by Zekrom and Damon's Gothitelle or by Reshiram and Damon's Reuniclus. Ash ventures into the caves and finds Reshiram or Zekrom to help Victini. As Reshiram and Zekrom duel, both spot the destructive Dragon Force and join forces to stop it.
Zekrom or Reshiram releases Victini and Damon is shown the Dragon Force, prompting him to use the castle to contain the unstable power with help from Reshiram and Zekrom. The group evacuate the castle, but Damon wants to try and fix the mess he has made, and Victini remains trapped by the barrier with Ash and Pikachu not wanting to leave Victini, while the Dragon Force's power grows deadlier and the castle floats up into the sky. Victini appears to sacrifice itself to blast apart the barrier by using its signature move V-Create, the contained Dragon Force energy being fired into space. Damon, Reshiram, and Zekrom guide the castle to the edge of the sea, and seal away the Dragon Force once again.
Later, Ash, Iris, and Cilan visit a nearby beach in Victini's memory, tossing one of Cilan's macarons into the ocean. Victini appears and eats it, now free of the barrier (and somehow having survived the ordeal of using V-Create to destroy the Pillars of Protection and the barrier) and has plans to restore the valley its own way. Damon begs for forgiveness, receiving it from Juanita.
