It is Rhydon that evolves into Rhyperior for one thing. Give a Rhydon a Protector to hold. Then do one of a few things:
Trade it with yourself if you have access to two DS systems and two compatible games.
Trade with a friend and have them trade back.
I think you can trade with yourself on Wi-Fi. Look on this site for details how. Just search for a question that deals with that information.