While it's true I am the master of a bunch of monsters designed to fit in my pocket, be unleashed upon a moment's notice, and are, for profit I might add, meticulously trained to do battle like a pack of hunting wolves, I am actually giving my Pokémon the most beneficial lifestyle they could ever have.
You see, there's this little thing called "happiness". And not only it is an emotion that can be felt by Pokémon, its growth can actually be numerically and statistically charted. There's a number of ways you can foster and elevate happiness, but the most common and most effective way is to embrace the lifestyle you're so quick to shun: embark on a journey to raise your Pokémon into a lean, mean domination machine. Take the time to level it up. Show the effectiveness of your mutually beneficial relationship by fighting towards and earning badges. Feed it vitamin supplements to raise its combat strength and effectiveness. They actually appreciate the fact you'd take the time to do these things. Not only are they content with it, they're positively ecstatic at the idea of becoming your personal unstoppable monster.
So I want you to take the time to think: whenever your Pokémon, that you keep shackled to its inferior life of being excluded from human interaction and forced to never grow from its wild beginnings, is curbstomped by my healthier, happier, stronger, and all around superior buddy, ask yourself as you bathe in its tears and sorrow: who's the real monster?
So Team Plasma PETA, if you're going to decry what I do for being unethical, I might just award you with a little "hypocrite" badge.
And then I will promptly stomp you into the ground and take the badge back as part of my campaign to be the very best. Because that's just how I roll, and according to statistical and empirical evidence, my Pokémon couldn't be happier any other way.
This has been a satirical response to PETA's (hopefully) satirical Pokemon parody. Both of us are aware that Pocket Monsters are not real animals and vice versa. I just felt like whacking down the in-universe argument.
Fun conjecture: If you take the "battle as a means to grow a healthy symbiotic relationship between Man and Pokemon" approach, then Team Rocket's "Tools of War" philosophy might actually be on higher moral grounds than Team Plasma's "Liberate" philosophy.