to clone without gts you go to pc, put a whatever any pokemon u want to clone at a empty box hold start and select, while holding ur pokemon then move to a new ox by pressing L or R then back to refresh box then move pokemon and put down
you shouldnt of posted this here should of put it in cheats if it was true but only way to clone is with gts i have tested it only works with gts his way may damage your game file so dont try it