Pokémon Adventures: Diamond and Pearl/Platinum Vol 5

From the VIZ Media edition

Lady feels betrayed when she finally discovers the truth about Diamond's and Pearl's identities. Is the trio's journey - and friendship - over?! And how can our three heroes save three Legendary Lake Pokemon from Team Galactic... when each Legendary Pokemon is in a different lake?! Meanwhile, what evil is Team Galactic secretly concocting in an abamdoned factory...? Plus, meet Bronzong, Mothim, Staraptor, Gilscor, Lucario, Vespiquen, and many more Sinnoh Pokemon friends.

Source: Anime News Network Encyclopedia