Pokémon: Giratina and the Sky Warrior

Five years ago, Newton Graceland, a researcher of the Reverse World, built a device designed to absorb Giratina's powers. The purpose was to enable travel between the normal world and the Reverse World. Newton deactivated the project after learning that the process would kill Giratina, and the blueprints were subsequently erased.

A collision between time and space caused two dimensions to link improperly, resulting in a destructive unraveling of reality. Dialga and Palkia fought over territory in Alamos Town, believing the other had encroached, leading to severe distortions in both worlds. These distortions polluted the Reverse World, provoking Giratina’s wrath.

Giratina, angered by the chaos, captured Dialga and dragged it into the Reverse World. During this event, Shaymin, a flower-bearing Pokémon, was caught on Dialga's back as a portal opened. Shaymin used its powers to escape back to the normal world through a portal.

Frightened, Shaymin activated its powers to escape through a portal back to the real world. Dialga, subdued, followed Shaymin through the portal, prompting a sequence of events involving Giratina's attempts to regain access to the normal world.

Shaymin encounters trainers Ash, Dawn, and Brock, who agree to help it reach the Flower Garden high in the mountains. The goal was to facilitate its migration and the blooming of new flowers through flower bearing. During their journey, a portal to the Reverse World opens and swallows them.

In the Reverse World, Ash, Dawn, and Shaymin meet Giratina. Newton rescues them from Giratina, but Giratina immediately targets Shaymin to use its power. Newton intervenes to send Shaymin, Ash, and Dawn back to the normal world to avoid Giratina's aggression.

Zero, seeking Shaymin's power, launches an attack using an army of Magnemite, Magneton, and Magnezone. He captures Shaymin, forcing it to open a portal that allows Giratina to return to the normal world. Shaymin's transformation into Sky Forme allows it to fly during this critical moment.

Shaymin triggers a portal that frees Giratina from the time loop. Giratina returns to the normal world, and Zero captures it, attempting to use Newton's device to absorb Giratina’s abilities to dominate the Reverse World. Newton disables the device, releasing Giratina.

After Giratina's abilities are absorbed, it collapses from exhaustion. Shaymin heals Giratina, but Zero escapes to the Reverse World, causing a glacier to move toward the Flower Garden. Pokémon Regigigas and Mamoswine work together to slow down the glacier.

Shaymin opens a portal, dragging Zero back to the normal world. Zero's ship crashes into the glacier, and his data on Giratina's abilities is lost when Buneary and Swinub freeze the ship. Giratina restores the damage caused and leaves to track down Dialga.

Giratina departs after restoring the damage, while Shaymin and other flower-bearing Pokémon perform their migration in the Reverse World. The heroes reflect on their adventure, and Giratina begins its pursuit of Dialga, leaving the mountain area.

During the end credits, Newton rescues and reconciles with Zero, who is arrested. Ash, Dawn, and Brock send flowers to their families as a sign of gratitude, wrapping up the story with a message of peace and closure.