First of all, it's Pokémon is pronounced POH-KAY-MON. But to tell you the truth, not many people say it like that because it sounds funny.
Pokémon are small monsters (Pokemon is short for Pocket 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, through discoveries by other trainers such as yourself, 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! In Pallet Town, the town that you as a Pokemon trainer start out in, However, you have a long road ahead of you. Though your first Pokemon is given to you by Professer Oak, 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. An example of one of the not-so-friendly battles are ones against your rival, Gary. Gary is Professer Oak's nephew and your next door neighbor.
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. Other Pokemon experts, such as Bill, are just people willing to give you information to help you on your journery.
Well, now that you are an educated Pokemon trainer, it's time to set out and conquer all the Pokemon of the world. Good Luck on yor adventurous journey!