Blue

Blue is a gym leader originally from Kanto. When deciding on the new gym leaders for One World, Blue was chosen as the mixed-type leader.

Life in One World
Before shipping off to One World, Blue helped create the digital shield generator with the 5 pokemon professors that would soon protect One World. He also traveled to Unova to capture a new member for his team, a Ferroseed from Chargestone Cave, in case they hadn't managed to transport all the wild pokemon to the new region before the supposed apocalypse. After arriving in One World, Blue settled in the small-town community known as Taurus Town, and soon became the mayor, along with his duties as the town's Gym Leader. Blue now runs the Taurus Town gym, with the services of some One World Police Department trainees, who use the gym's challengers as battle practice.

Blue has grown sort of a friendship with his successor, Giovanni, now that Team Rocket has disbanded officially and Giovanni has retired from work completely. Blue pushed Giovanni to form the One World Police Department, since Giovanni had always talked about wanting to repay his debt, becoming the new sheriff after Blue appointed him.

Trivia

 * Blue was chosen as gym leader as a replacement for the seventeenth type that is not represented, the Dark type.