Instructions
Begin the game. After you start a new game, name your protagonist and antagonist. Then watch a couple of cut scenes.
Leave your house. Go north, out of town. A small patch of grass is just outside of town. Once you step into the grass, Professor Oak will stop you because it is dangerous to enter the grassy area without any Pokémon for protection. He will then take you back to his lab and let you choose a starting Pokémon.
Choose the Pokémon in the center. This is the Charmander.