Pokémon Diamond and Pearl Adventure!, Vol. 4

Hareta and his friends, joined by several of Sinnoh's Gym Leaders, launch an attack on Team Galactic's headquarters — but it's a trap. One by one, his friends are captured, and pushing deeper into the enemy base, Hareta comes face-to-face with Mitsumi, who has now joined Team Galactic. As Cyrus gloats over his unfolding plan, Hareta and Mitsumi's Pokémon battle puts their friendship to the test.