If you mean breed, just put two Pokemon of opposit gender in the day-care. (Old people doing dirty things to my Pokemon -.-)
By cloning them
No, to multiply a Pokemon, you will need to go to the Day care centre. You will hand over the Ditto and the Pokemon you wish to multiply (Legendaries DO NOT MULTIPLY!) over the the Women, exit the building and Run for about 250 steps. Then when you have done the 250 steps, the Man at the gate will have stepped forward out of the gate. Go and talk to him making sure you have a space in your party, you will receive the egg and inside will be the Pokemon you wished to multiply. Hope this is useful
Get action replay.
The only known way(s) to multiply a Pokemon (A.K.A - Clone a Pokemon) is to-Get onto GTS (Global Trade Station) and 'Clone' the Pokemon you wish to on there.Use a cheat, but I don't know what cheat that is but I know there is one.
You can't. -seal339
To multiply items on Pokemon Diamond/Pearl, you need the action replay. Unfortunately, if you have the DSi, the action replay won't work. It only works for the DS. If you want to 'multiply' Pokemon, breed them by leaving a male and female Pokemon in Solocean Town Daycare Center. Possibly, they could lay an egg!
no
do you mean reproduce you can do that by giving your Pokemon with a ditto to the day care......
Catch a Zigzagoon he picks up stuff as you go.
you cant dumb dumb
use ur action replay der der der. type multiply Pokemon code for ar(action rerlapy) in Google box!
Put a boy and a girl Pokemon of the same species in the day care center for a while and you will get an egg or put a Pokemon like hitmonlee in the day care with a ditto. That trick only works if the not ditto Pokemon has a gender.