From the Rulebook:
Welcome to Pokémon Tabletop United, a pen and paper roleplaying game where players play the role of trainers in the world of Pokémon. It is best played with a group of 2-4 players creating Player Characters, or PCs, to act as their avatars in a game world created by their Game Master, or GM. We’re going to presume if you’ve found us that you’re probably familiar with most tabletop roleplaying terminology or have at your disposal someone who can quickly explain the basics to you! Pokémon Tabletop United is designed to handle a variety of different ideas for Pokémon tabletop RPG campaigns. You can use the system for a traditional game where the players take the role of young Trainers receiving their first Pokémon from a Professor as they prepare to leave town for the first time and conquer the Pokémon League. Or you could play a campaign about Pokémon in Space or a Wild West frontier exploration game.