Beating wild Pokémon...

Nothing unusual. We get our Pokémon we want to train, walk into the tall grass and battle wild Pokémon. But did you ever think about what you're actually doing? 

When you get a wild Pokémon's HP to 0, the text box says: "Wild (insert Pokémon name here) fainted!"

                                           Poor Zigzagoon...

We all know what "to faint" means, right? So it's basically, you beat that poor thing until it faints and leave it there, without any guard, just to get your own Pokémon stronger. I wonder what happens to the fainted Pokémon...since you'll never run into them again...