umm there was code up somewhere on GBAtemp that had this ones up, hope this one helps out, no credit to me:
*DO NOT USE BOTH CODES AT ONCE*
Hold [L] While Switching to Clone PKMN
The first choice you choose will be the PKMN you clone! require screen refresh
1207484C 0000231D
94000130 FDFF0000
1207484C 0000E008
D2000000 00000000
Hold [R] While Switching to Clone PKMN
The first choice you choose will be the PKMN you clone! require screen refresh
1207484C 0000231D
94000130 FEFF0000
1207484C 0000E008
D2000000 00000000
how to use these codes -
when your in your box, make sure you hit "move" down at the bottom first, then you go to the pokemon you want to clone, then hold down the butto with the code you inputted, while you hold the button down you can clone any of the pokemon you grab ahold of