Since Heartisalone is a pokenoob, I decided to write this for her and here we go:

Pokemon are pocket monsters, hence the name 'pokemon'. The most commonly known pokemon is Pikachu, due to Ash Ketchum, the main protagonist of the pokemon series, getting Пикачу as his starter pokemon. These are the sarters from each region:
KANTO:
Squirtle, Charmander, Bulbasaur
HOENN:
Treeko, Mudkip, Torchic
JOHTO:
Cyndaquil, Totodile, Chikorita
SINNOH:
Piplup, Chimchar, Turtwig
UNOVA:
Oshawott, Tepig, Snivy

In the anime, characters are able to catch wild, или not caught или released starter pokemon and regular wild pokemon,...