From Bulbapedia, the community-driven Pokémon encyclopedia.
Shin (Japanese: シン Shin) is the main character of the manga series Pocket Monsters BW: The Heroes of Fire and Thunder. He is based on the male player character of Pokémon Black and White.
According to N, Shin is considered to be an odd Pokémon Trainer as he understands Pokémon language real well.
Shin first appears when Togari, a Team Plasma Grunt, tried to steal a girl's Cottonee. He battles with Togari and easily defeats him with the Cottonee being returned to the girl. N, witnessing the battle, decides to travel with Shin to teach him about the world of Pokémon. Suddenly, two Team Plasma Grunts take N's Purrloin and Shin tries to stop them. Shin was able to knock down one of the grunts as the grunt threw the Purrloin to another one identified as Togari. Togari runs off very quickly and Shin and N have to find him.
They search for Togari in a forest and find him by a rocky plateau where the rematch with Shin took place. Unlike last time, Togari manages to outnumber Shin using two Pokémon, making the battle way more tougher. Despite Shin having a disadvantage, he manages to defeat Togari with Tepig's Flame Charge, as well as sending him flying, with N retrieving his Purrloin in the process.
Shin battles a Blitzle which was separated from its Zebstrika herd. As Shin was about to attack a Zebstrika with his Pignite, N blocks the attack when he realized what Blitzle and Zebstrika were saying. With Blitzle returned to the herd, Shin and N head over to Dragonspiral Tower. When they arrived, both of them get separated by a falling pillar. While Shin was on his way to the top floor of the Dragonspiral Tower, he encounters Togari who stops him from doing so. Togari sends out his Seismitoad to battle Shin. After the battle, Shin continues his way to the top floor and finds N, only to have awakened Zekrom.
N explains to Shin the truth behind Team Plasma and flees on Zekrom. Shin leaves Dragonspiral Tower, angry for what N is doing. Before he can find N, he notices a guy that was beaten by two brothers who owned a Bisharp and Accelgor. These brothers were unstoppable as they kept on beating Emboar around despite Emboar having a type-advantage. Before the battle can continue, Alder grabs him and throws him into a Trubbish dump. He declares to Shin that he cannot beat N. Shin continues his battle with the brothers while Alder snuck a Hyper Potion on Emboar's tail. Shin then commands Emboar to punch the ground and finds a Durant. After Shin defeated the brothers, Alder reveals to him that he is the Champion of the Unova League.
Alder tells Shin the story of two legendary Pokémon, Zekrom and Reshiram, and knows that he is one with Reshiram. Proving to Shin, Alder takes Shin to the Relic Castle in the Desert Resort where the Light Stone is. After finding the Light Stone, Alder battles Shin with his Volcarona. Alder then tells Shin that it was a test to see if he is worthy of controlling Reshiram. With Reshiram awakened, Shin flies off to find N.
As N was spotted, Shin battles him with Reshiram against Zekrom and loses horribly. Shin battles him again and it is the same from last time. Shin is trapped inside while N is about to fly off. As Emboar could not produce a flame to get them out of there, Reshiram powers up Emboar and manages to free Shin, as well as penetrate Zekrom's electric forcefield. With N defeated, he reconsiders changing his ways and Shin watches him fly off on Zekrom, promising to battle again someday.