The clone trick was once put in the user cheats (or hints) area for this form. It mite still be there. Anyway, it was used to make copies of other pokemon and the items they were holding at that time. Some use it for more rare candies (a bad idea), others use it for extra expensive items they have (to make a fast buck), or extra rare items they only get one of, but I only use it to trade a pokemon I want to keep. This topic really wasn't necessary.
Are you satisfied? Or do I have to beat the c*** outta you too?