These small creatures have taken the World by storm.  The idea is that animals are replaced by creatures that humans raise and train.  They live in these little Pokeballs (the background).  They are drawn in the average Jappenesse Anime style with the big eyes and the cute little faces.  There are 151 known species of Pokemon at this point and time.  It is both a game and a show (Sundays after Batman Beyond, well at least where I am).  Also to note the major characters are Ash and his Pokemon named Pickachu.  Also the costars are Brock and Mindy two Pokemon trainers.  I hope that made since.  Also there's Team Rocket, but that would just confuse you.