The Black and White arc of Pokémon Special.

This chapter follows the adventures of Black, who is on a quest to become the Champion of the Pokémon League. He is joined by White, a young woman who owns the Pokémon acting company, the BW Agency, and aims to raise the best Pokémon actor. As they go through the Unova region they encounter the group Team Plasma, who aim to free Pokémon from Trainers, and the mysterious N.
-Bulbapedia


(Pokemon Special has several different arcs serialized in parallel in a few different magazines, so the exact numbering for the BW arc is unknown. Hence, this is registered under a completely new series)
Numbering table: http://bulbapedia.bulbagarden.net/wiki/List_of_rounds_in_the_tenth_chapter_of_Pok%C3%A9mon_Adventures