Pokemon Movie 18: Ring no Choumajin Hoopa

Synopsis

A century ago, a traveler sealed the immense power of the legendary Pokémon Hoopa within a bottle, hiding it away. A young man later discovers and breaks the seal, unleashing Hoopa's shadow form. This unbound entity shatters the bottle and attacks the original Hoopa, escalating into a massive battle involving numerous legendary Pokémon. Caught in the chaos, a young trainer named Satoshi and his companions must find a way to quell the destructive conflict before it devastates everything.