Pocket Monsters: Battle Frontier

10-year-old Satoshi, after finding a Pikachu messing with the wiring in his house, is on a journey to become the greatest Pokémon Master and to beat out his rival, Shigeru. Along the way, he meets with many other Pokémon trainers and advisors, including water-based trainer (and gym leader) Kasumi, ground- and rock-based trainer (and gym leader) Takeshi, and others.

The chapter begins with focus on a Trainer named Emerald, who is sent by Professor Oak and Crystal to catch Jirachi within seven days. On arrival at the Battle Frontier, he accidentally interferes in the opening ceremonies and gains the second challenge of clearing the seven Facilities by defeating the Frontier Brains within that time. During this time, Emerald befriends Todd Snap and discovers that the masked Guile Hideout is seeking Jirachi for evil purposes. (Source: Bulbapedia)