DPA011: The Legendary Pokémon, Captured

The Legendary Pokémon, Captured (とらわれた伝説のポケモン) is the 1st chapter of Volume 3 of the Pokémon Diamond and Pearl Adventure! manga.

Synopsis
Hareta goes to Lake Valor to see what is going on there because of the smoke. There he sees Team Galactic and wants to fight them but the other Gym Leaders appear and help him out. Going further he sees Saturn there and wants to battle him but Byron appears and fights Saturn instead. However Byron is defeated and Hareta decides that he will take on Saturn instead.