Kk you ever wished to clone say like four boxes of items well i am going to show you how:
1st: beat the pokemon league.
2nd: you need to have acess to battle frontier (if you don't know how go to your house and talk to your dad in the game off course)
3rd: have 30 items and give them to pokemons in a box.
4th: exit the PC after you give the items to the pokemons for them to hold.
5th: save your game.
6th: go back to the PC and go to move irtems and put the 30 items in your bag.
7th: go to the lady of multi link battles and talk to her.
8th: talk to her and sya you wanna battle in this case chalenge.
9th: after you chose chalenge she will say what level you want or something like that just chose open level.
10th: then press yes and after you press yes it occurs a pause short one and the press yes again two times.
11th: after you press "yes" when the game is saving turn off your gameboy and then turn on again and check your bag you will have 30 items of the ones you wanted to clone and check your box the pokemon will hold another 30 items f the ones or one you cloned.

this allows you to clone very fast items i sugest you use it to clone rare candy's or master balls and more items you want.
happy cloning!! !!Piece!!