Pokémon: Diamond and Pearl: Battle Dimension: Volume 4

Ash, Dawn, and Brock continue their journey through the Sinnoh region, with Ash working on his next two Gym badges and Dawn striving to break her recent string of defeats. Some new Pokemon have joined the team-including Paul's traumatized Chimchar-challenging the depths of our heroes' Pokemon knowledge. Luckily, they'll be attending Professor Rowan's Pokemon Summer Academy and meeting a lot of Pokemon experts! But will they learn enough to deal with the devious threats posed by Pokemon Hunter J and Team Galactic?