Pokémon Advanced Generation: The Movie - Deoxys, the Visitor from Space

Four years ago, a meteorite crashed into the polar region, giving birth to Deoxys, the DNA Pokémon. Rayquaza, the Sky Pokémon that resides in the atmosphere, perceived Deoxys as an invader of its territory, leading to a fierce battle between them. In the end, Rayquaza defeated Deoxys, and its core sank into the sea. Professor Lundon, along with his assistant Yuki and his son Kouta, happened to be visiting the area for research, witnessed everything, and took away another Deoxys core that remained inside the meteorite, still dormant. Since then, Kouta has been afraid of Pokémon. Four years later, Ash and his friends visit Larousse City, the high-tech city where Kouta lives, to challenge the Battle Tower. By mistake, Kouta is identified as a challenger and sent to the arena alongside Ash. At the same time, Deoxys fully recovers and heads to Larousse City, guided by signals from its companion. A great battle between the two is about to erupt...