Pokémon Diamond and Pearl/Other Cheats

Cloning

 * 1) Enter the GTS (Global Trade Station).
 * 2) Deposit the pokemon that you want to clone.
 * 3) Select any lv 100 pokemon in exchange so no one will take your pokemon.
 * 4) Click yes to confirm trade.
 * 5) Once the Pokémon shows up and looks like its about to be put in a pokéball turn off your DS.
 * 6) Turn on your DS and reload the game.
 * 7) Check your party your pokemon should still be with you.
 * 8) Enter GTS and retrieve your pokemon that is stored inside.