Using the Pokemon in the provided list, will you please come up with the best team possible (Pokemon Diamond)?

To be honest with you alot of the pokemon listed i rarely use. I do have a mamoswine and i got the set off of serebii. I think your best bet for good sets if your not going to make your own is to check out sites like serebii and smogon. Serebii and the 4th gen pokemon of the week is what gave me alot of my sets. But since they are predictable i usually change up to my liking. Best of luck.