Pokemon the Movie 18: Hoopa and the Clash of Ages

The movie follows the aftermath of a lone traveler capturing Hoopa, a powerful creature capable of defeating legendary Pokémon, and sealing it in a bottle a century ago. The bottle was hidden in a desert cave to prevent the contained power from being released. Years later, a young man finds the bottle and breaks the curses surrounding it, unleashing Hoopa's shadow. The shadow proceeds to wreak havoc, prompting Hoopa to summon other legendary creatures for a battle, which Satoshi and his friends get entangled in while trying to stop the chaos.