Satoshi and Go travel to the Sinnoh region on a research fellow mission and end up attending a festival held at the Mio Library. There, they reunite with Hikari, Pochama and Shirona. But just then, unknown to all, the remnants of the Galaxy Gang capture Heatran and begin a secret scheme. Strange phenomena start occurring all over the Sinnoh region as a result of an experiment they've started that involves a Plate said to be a part of the Mythical Pokémon Arceus' power. At the same time, the incredible power of the Plate ends up tranforming Heatran into a terrifying form. Having noticed the phenomena, Satoshi, Go and the others try to resolve the situation, guided by the Legendary Pokémon Yuxie, Agnome and Emrit. They discover the Galaxy Gang and engage in a heroic battle in an attempt to save the rampaging Heatran, but trouble breaks loose due to Heatran's never before seen form. And then the Mythical Pokémon Arceus descends.
Summary:
Satoshi and Go travel to the Sinnoh region on a research fellow mission and end up attending a festival held at the Mio Library. There, they reunite with Hikari, Pochama and Shirona. But just then, unknown to all, the remnants of the Galaxy Gang capture Heatran and begin a secret scheme. Strange phenomena start occurring all over the Sinnoh region as a result of an experiment they've started that involves a Plate said to be a part of the Mythical Pokémon Arceus' power. At the same time, the incredible power of the Plate ends up tranforming Heatran into a terrifying form. Having noticed the phenomena, Satoshi, Go and the others try to resolve the situation, guided by the Legendary Pokémon Yuxie, Agnome and Emrit. They discover the Galaxy Gang and engage in a heroic battle in an attempt to save the rampaging Heatran, but trouble breaks loose due to Heatran's never before seen form. And then the Mythical Pokémon Arceus descends.