Here are the cloning cheat for pokemon and items.

pokemon
1 go to battle fronter battle tower
2 deposit pokemon wanted to clone
3 save
4 with draw pokemon wanted to clone
5 go to link multy batle
6 pick any two pokemon
7 let it save
8 when it says "do not turn off power turn off
now you have cloned pokemon

items
1 repeat step 1 on clone pokemon
2 go to move items
3 give the item to any pokemon to clone
4 sve
5 repeat steps 7 &8 and you now have cloned items

i got 26 rare candys by doing this glitch