Well, I wasted 15 minutes signing up for an account, and then searching the forum for "Pokemon White". I found out that Sion is using edited Pok?mon sprites other people have made.
I say, big deal. They're not anyone's sprites. If you post a sprite on the internet, expect it to be used. It's exactly the same as using the official sprites. They're not yours. You didn't make them.
You could have easily told us why here, Beefy. It would have probably taken you less time to tell us, then writing out your dumb post to tell us to go to your forum. I guess that's what you wanted though. Make people go to your forum and sign up to find out what you're talking about. Your member count goes up, but that's it. Those people will never post on your site--other than to flame you.