Pokemon won't improve with blood, death, and explosions. Well, we already have explosions; just watch the attack animation.
But really, the theme of Pokemon is to go on a grand adventure, make friends, battle people, and enjoy it. Battling is like a sport, but the games are so much more than just that.
Compare it to a football video game. Would it really be better entertainment if you killed people in it? Unless you find enjoyment in the death of people, it wouldn't be any better. Deaths and blood in Pokemon would just taint the carefree simplicity that makes the series what it is.
Oh, and more money does mean better, because if you're getting more money, that means more people think it's worth buying. And more people thinking it's worth buying=better.