I downloaded pixelmon and got my server up and running, but then the server gave the error message saying that is was rejecting the pixelmon mod, I then went and checked to make sure I had the right pixelmon version, and I did, so I don't know whats wrong.
EDIT: I think I figured out the issue, since the download link in the pixelmon.com website no longer exists (thanks nintendo) i had to download it off of mediafire, and i think it gave me a slightly different version than the one i need, so i must ask the devs to make a new download link to a site to download the proper version of pixelmon.