You can't :'(...Tried as I have to locate a Ruby cloning cheat, all I have found is useless, fake codes and the Emerald cloning cheat. Sorry :(
breed them at the day care
you can't duplicate Pokemon in ruby, but you can in emerald, by using the battle frontier.
you cant. you only can in emerald, sappire, and ruby
Well, in my opinion, you can duplicate Pokemon only in Pokemon emerald. I tried the duplicate trick on Pokemon ruby but it didn't work. If you want to duplicate Pokemon in emerald you have to go to the battle tower, save in front of the p.c, deposit the pokemons you want to duplicate, save again,withdraw the Pokemon you deposited,talk to the lady at the counter she will make you save as soon as it says"saving do not turn of the power" turn it off right away. vola!!!!!!!!!!
You get a ditto and the Pokemon you want to duplicate (cannot be neutral Pokemon like legendaries), then put them in the day care. Wait, and keep talking to the Day Care Man until he gives you an Egg (you will need a space in your Pokemon party), then hatch the egg, and it will be the first evolution of that pokemon.
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.
You can't
It can't be done.do not duplicate your Pokemon your game boy save will be delete
Pokemon ruby's version IS Pokemon ruby.
It's the same as any other game. Ditto+ Pokemon you want to duplicate (not legendaries)xthe Pokemon daycare= Egg. Hatch the egg and you either have a duplicate Pokemon OR the first evolution of that Pokemon.
This is not possible without Action Replay. There is a code that can duplicate Items and Pokemon, but if you mess up on one of the steps, then your game might either freeze or turn off. So overall, it's very risky.
You can't duplicate items in Pokemon. Only if you have the Action Replay or GameShark, then you can.
As far as the game goes, you can't duplicate Pokemon on Sapphire. Tried it and it glitched up.