Hareta, raised in the wild by Pokémon, decides to become a Pokémon trainer. Along with his first Pokémon Piplup and his new friend Mitsumi, he sets off in search of the legendary Pokémon Dialga, but Team Galactic is hunting for Dialga too.

"As they journey through the land of Sinnoh, Hareta and his partner Piplup grow stronger every day--while ruining Team Galactic's schemes and getting into plenty of Pokemon battles along the way!"--Cover.

"Hareta and his friends take on Team Galactic! But they've walked right into a trap! Hareta, together with several of Sinnoh's Gym Leaders, launch their attack on Team Galactic's headquarters (after a short break for some lunch)! Things go wrong quickly, and one by one, Hareta's friends are captured. Hareta pushes deeper into the enemy lair, only to come face-to-face with Mitsumi, who has now joined Team Galactic! The two friends and their Pokémon...