Ok here is what you do:(make sure the item u wana clone is being held by the pokemon ur cloning)
1: get your PC to a box with no pokemon
2: save infront of computer in PC
3: go into computer and deposit the pokemon you wana clone
4: go to change box and switch to one with none in it
5: would you like to saveYES overwrite saveYES
!!!IMPORTANT STEP DONT MESS UP 6: when the period is typed at the end of SAVING, DONT SHUT OFF THE POWER.(or somthin like that) wait like 1/2 a second then restart the gb (or gba or close the window if gba emulator)
NOW THE POKEMON YOU PUT IN BOX SHOULD BE IN BOX AANNDD IN UR PARTY AND BOTH WILL BE HOLDING THE ITEM THEY WERE HOLDING