You put it in a LOT easier explanation.
lol
Why thank you. =P
And when pokemon "faint" they've actually been beat up or knocked out. The player should "faint" not the pokemon.
When a person or animal gets knocked out from pain or injury, it can be said they "fainted".
They mean basically the same thing. Saying a Pokemon was knocked out is said often in the Anime and such.
In the games, there's also the term "It's a 1-hit KO!" when 1-hit KO moves, such as guillotine or sheer cold, connect.
KO is an acronym, which means Knock Out.
If you've played PBR, you may have heard the narrator say something along such as "Prinplup, was knocked out!".
The two terms are freely switchable.
Also, why would the trainer faint?
"My precious Pokemon fainted!"
*Does the classic putting hand over forehead and fainting motion*
I'd think they were being melodramatic... Than I'd probably call an ambulance... Although that's not the point.
That wouldn't really happen... The trainer would just return the Pokemon, and go to the Pokemon center.
In other words, disappearing from the scene, or whiting out.