The Pokémon 'Bulbasaur'
As the most of the PCO players know, there are Pokémon (creatures) in the game. The game actually is about those creatures. In the Beginning of the game you can choose between 3 of those Pokémon. You can choose between 'Bulbasaur', 'Charmander' and 'Squirtle'. After choosing one you can search for wild Pokémon in the tall grass. You can knock those Pokémon out for gaining exp pts. Your Pokémon can level up like that, so you can make them stronger by giving them TP. You can also catch wild Pokémon by using a Poké Ball.