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.
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
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.
Cheat like hell.
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?
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
you should go to gamestop