You might've heard of this guy named Michael Vick. See, what he would do is train dogs to viciously attack each other for human amusement and gambling (possibly over trinkets like jewelry or Badges). If you are a dog lover, go to the next slide now. People have testified in court that when one of Vick's pit bulls didn't perform to his satisfaction, he would beat, drown, or electrocute them. And… wait a second. This sounds awfully familiar.
When a Pokémon trainer tells Pikachu to use Thunderbolt against a wild, minding-its-own-business Growlithe, is that so different from the actions Vick was shamed and incarcerated for? When two Pokémon are forced to fight for sport--and, in the case of Pokémon Stadium, entertainment--aren't they as helpless as Vick's pit bulls were? Every time your Blastoise uses Skull Bash, Bite, Tail Whip, and Hydro Pump (all real attacks) on a defenseless Poochyena, just think: at this moment, you're no better than Michael Vick.