You are a boy who is about to begin his Pokemon journey! You must catch all 150 Pokemon to become a Pokemon master. To become a master, you must fight trainers along the way. Eight of these trainers are considered to be leaders in the World of Pokemon. They are called Gym Leaders. You will usually find a gym in every town.
As you walk out into the tall grass in search of Pokemon, Prof. Oak(the leading expert in Pokemon) calls to you. "Stop! Wild Pokemon live in tall grass. You need to have your own Pokemon to protect yourself from the wild ones," he says. He takes you to his lab. Three pokeballs sit on his desk. Bulbasaur, Squirtle, Charmander. Which one will you pick? Choose the right one, and you're on your way to becoming a master. Choose the wrong one-well, I won't say what happens when you choose the wrong one.

This is you, a trainer waiting to become a master.

This is your rival. You were once great friends, but then he became mean and competitive.

The professor. He gets you started on your Pokemon journey.