Hareta, Piplup, and Mitsumi launch a search for the legendary Pokemon Dialga. Team Galactic is also hunting for Dialga and Hareta's team must beat them before they put their evil plans into action.
General Note
Translated from the Japanese.
Printed Manga-style: book opens from left to right; pages are read from right to left.
"First published by Shogakukan Inc. in Japan as Pokémon D: P pocket monster diamond pearl monogatari"--Title page verso.