• English / United States: Barry
• Japanese / Japan: ジュン
• Japanese (Romanized) / Japan: Jun
• Japanese (TL) / Japan: Jun

Barry is one of Ash Ketchum's rivals that he met in the Sinnoh region.

Barry bumped into Ash Ketchum when he was chasing after Gible in a town near Daybreak Town. It was then revealed that he had already won six badges and had also gotten a priority ticket in order to challenge Fantina. He had gotten a bike too, in order to be able to travel from town to town faster, but Ash's Gible (who was still a wild Gible at the time) ate it while he was talking with Ash Ketchum. Then, furious that he lost his bike, Barry called upon his Empoleon to battle it so that he would be able to catch Gible in the end. A powerful Hydro Cannon attack coming from Barry's Empoleon, though, sent it flying, thus ruining Barry's attempt at a capture. Barry later appeared and challenged Ash Ketchum to a battle, after seeing that he had managed to catch Gible before him. Barry chose his Empoleon and Ash Ketchum chose his newly-caught Gible. Due to Barry's Empoleon being overall stronger than his opponent and Gible's disobedience towards Ash Ketchum during the fight, Barry managed to score a win over Ash Ketchum.

Ash Ketchum and his friends encountered Barry again on their way to Sunyshore City. Barry informed Ash Ketchum that he had already gathered eight badges and, thus was eligible to take part in the Sinnoh League. At the town's Pokémon Center, Barry met Paul for the first time and he challenged him to a battle. Paul refused to battle him, saying that he was in the middle of adjusting his team for the upcoming Sinnoh League, and a battle would distort their condition. He told Barry that he should challenge Ash Ketchum to a battle instead. Even though he didn't consider the idea at first, as he didn't deem Ash Ketchum to be on the same level with him due to having only seven badges, he decided to challenge him to a battle after hearing his explanation concerning what had happened between him and Paul, and seeing how determined he was to win the next battle against him.

The first Pokémon Barry chose for his three-on-three battle against Ash Ketchum was his Empoleon, while Ash Ketchum chose his Monferno. During the battle, Ash's Monferno was hit by a powerful Hydro Cannon attack and blasted off into the nearby forest. As Ash Ketchum was calling out to it, Team Rocket suddenly appeared and managed to trap Ash Ketchum and the others, as well as capture Ash's Pikachu, Dawn's Piplup and Barry's Empoleon shortly afterwards. In the end, with the help of Paul's Electabuzz, who aided in stopping Team Rocket's destroyed mecha from collapsing and injuring the captured Pokémon, and Ash's Infernape, who had just evolved unexpectedly from his Monferno, Barry was reunited with his Empoleon.