Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
What sprites are you talking about? If you're talking about the Pokemon sprites, they're the same ones as from the games, so they can't get any more hi-res. If you're talking about the attack animations, I don't know what to tell you.
Also, I'm pretty sure stuff like this can go here... Don't quote me on that though.