Mirror Team Rocket are characters of the day who appeared in The Cave of Mirrors!. They are the Mirror World counterparts of Team Rocket. Their personalities are opposite to that of the regular Jessie, James, and Meowth, as they are heroes who fight criminals and evildoers. They also have distinctly deeper voices than their normal selves, and the "R" on their uniforms is horizontally mirrored. (Source: Bulbapedia)