The only way to clone a Pokemon so far is to use the action replay code:
Hold [L] While Switching to Clone PKMN The first choice you choose will be the PKMN you clone! require screen refresh
1207484C 0000231D 94000130 FDFF0000 1207484C 0000E008 D2000000 00000000
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I've been told that there is NO cloning method in HG or SS. You would likely need an action replay to do anything like that.
...Cheater. ;P
Or, you can put the Pokemon in the daycare, with either a Pokemon of the opposite gender or a ditto.
However, there are certain Pokemon that you cannot breed no you have to clone the LEGENDARYS MUHAHAHAHA and i know how :) ask what is the clone code in Pokemon heartgold and there will be the answer.
Action Replay.
Cant you can only on Pokemon heartgold search for how do you clone items in Pokemon heartgold and my answer will be there
There is no best Pokemon on Pokemon HeartGold.
there is no Pokemon Mansion in Heartgold.
They are not in Pokemon HeartGold
No, but you can trade Pokemon only in HeartGold to Black