What are Pokemon? First, it's pronounce POH-KAY-MON. Pokemon are small monsters that can be captured and tamed to become pets, guardians, or companions. Though your world is filled with the creatures, there are still many left to be captured and studied. As the mysteries of the Pokemon are slowly unraveled, the population of the Pokemon have been steadily rising and the monsters are becoming more aggressive.
Now is your chance to become a Pokemon Trainer and possibly achieve the highest title of all: a Pokemon Master! However, you have a long road ahead of you. Though your first Pokemon is given to you, you must root out and capture the rest of the 150 monsters. Your Pokemon will do all the work in capturing the wild Pokemon, but you must train and raise them. You will also face other Pokemon Trainers, who will challenge you to friendly and not-so-friendly matches. You will also find other Pokemon Trainers, who are not looking for trouble, but itching for a good Pokemon
trade. Professor Oak, a Pokemon Expert, will give you everything you need to get started. Good Luck!

Tooken from the text of http://www.geocities.com/TimesSquare/Realm/8689/pmst.html