Finally together again, Dia, Pearl, and Platinum must battle Legendary Pokémon Dialga and Palkia, who are being controlled by Cyrus, the powerful boss of Team Galactic! Then a new Legendary Pokémon leaps into the fray! Whose side is it on...? And who will rescue Platinum's hapless bodyguards from the mysterious Distortion World they've been banished to...? Plus, hang with Lopunny, Claydol and Ivysaur and meet Porygon-Z, Gallade, and...Looker?!
Lady faces a new Pokémon battle challenge when she must swap her Pokémon with her opponent and fight with rented Pokémon. Meanwhile, the Battle Frontier begins to suffer from a mysterious communications malfunction... What does it signify?
Then, Dia and Pearl set out to visit several Legendary Pokémon of the Sinnoh region. Will they be able to protect them from Team Galactic?
Plus, say hello to Togekiss, Empoleon, Heatran, Kakuna, Seedot, Ledian and Rotom!