you can only duplicate items in the game by going through this process:
1) Enter a Double Battle in your game.
2) Send out a Ditto with no item and a Pokemon with the item you want to duplicate.
3) Have Ditto use Transform on the Pokemon with the item.
4) Switch the Pokemon that was stolen from with a Pokemon that can use Thief.
5) Use Thief on your own Ditto.
6) Win the battle.
Now the player obviously has two of that item.
First of all , You need a Ditto ( That you can catch in Pokemon Mansion , In Cinabar Island ) .
Then , Talk the Ditto and the Pokemon you want to Duplicate , into the Day Care Center ( Situated , south of Cerulean City ) .
Then leave the Day Care Center , then Come back in , The Guy will give you an Egg , This Egg is the Duplicated Pokemon .
Hope i helped ( If i did , Please Recommend me and my Question )
You cant do it in leaf green, only in Emerald....
Yes you can trade leafgreen version Pokemon to another leafgreen version.
Im sorry you can't duplicate Pokemon in Pokemon platinum. You can duplicate Pokemon in diamond/Pearl or emerald the trade or migrate them to platinum though.
On Pokemon Pearl's title screen, if the Pokemon LeafGreen game is in the GBA slot, click on "Transfer From LeafGreen" and you can choose six Pokemon from LeafGreen to transfer to Pearl, but be careful-you can't trade them back.
Manaphy is a legendary water type of Pokemon. It is not possible to get this Pokemon in the game Pokemon LeafGreen.
i don't think you can:/
You cant do it in leaf green, only in Emerald....
yes, with the action replay go to www.cheathappens.com for the codes
first catch a ditto. then go to island 4 where you can breed pokemon. put the ditto in with a pokemon. the lady will tell you they dont like each other but they will breed a duplicate pokemon.
Using the action replay, if you don't have one, go to www.eBay.com
Don't need to because you can get more from leafgreen or Pokemon colosseum and Pokemon xd gale of darkness.
Answer:No you can't, you can only breed Pokemon that are able to be bred.
Yes you can trade leafgreen version Pokemon to another leafgreen version.
Not in Pokemon leafgreen only in Pokemon Firered never ever in Pokemon leafgreen And in Pokemon firered it is rare in power plant not available in Pokemon leafgreen?
Cheat like hell.
Im sorry you can't duplicate Pokemon in Pokemon platinum. You can duplicate Pokemon in diamond/Pearl or emerald the trade or migrate them to platinum though.
It can't be done.do not duplicate your Pokemon your game boy save will be delete