DPA029: Hearts and Spirits Collide

Hearts and Spirits Collide (通じあう心) is the 4th chapter of Volume 6 of the Pokémon Diamond and Pearl Adventure! manga.

Synopsis
Hareta and Koya continue their battle but Hareta has a hard time against Koya, who knocks many of Hareta Pokémon out. However someone appears and encourages Hareta to battle against Koya with fun. Koya doesn't think there is any fun in Pokémon battles, referring back to his past.