Pokemon the Movie 14: Black - Victini and Reshiram

The Kingdom of the Vale was a powerful and prosperous realm in the past, but it was eventually torn apart by a conflict between the ruler's two sons. The sons, with the help of their Legendary Pokémon familiars Reshiram and Zekrom, disrupted the Dragon Force, a vital energy source for the kingdom. The balance was later restored by the Mythical Pokémon Victini, who helped bind the Dragon Force with the Sword of the Vale. However, the kingdom was eventually destroyed, and the Sword was sealed to prevent another disaster.