In the film, the deadly Pokemon creature is actually a Deoxys, a multi-formed alien Pokemon. The crash-landing sends shockwaves throughout the city, including disrupting the power grid and trapping many citizens in buildings.
Ash and his friends, accompanied by a group of researchers, venture into the city to investigate the cause of the disturbance and encounter the Deoxys. The group soon learns that the Deoxys is not inherently evil, but rather confused and scared after being separated from its home planet.
As they try to communicate with the alien Pokemon, they come across another group of trainers who are attempting to capture the Deoxys for their own gain. This leads to an action-packed battle, with Ash and his friends working together to protect the Deoxys and ensure its safe return to its home planet.
Throughout the movie, Ash also forms a close bond with a young girl named Tory, who is struggling with a fear of Pokemon. Together, they overcome their fears and help to save the day.
Overall, Pokémon Destiny Deoxys combines thrilling action scenes with heartfelt moments of friendship and acceptance, as Ash and his friends work to save the city and the alien Pokemon.