How can you clone in pokemon firered and leafgreen?

Answer 1

Clone Pokemon
Note: This trick requires a nother Game Boy, link cable and Pokemon game.

Trade the Pokemon to be cloned, and have the other player select a Pokemon that he or she does not care about. Trade them, and make sure the player receiving the bad Pokemon can see the other player's screen. When the Game Boy that receives the good Pokemon's displays "Waiting", get ready to shut the other Game Boy off. When the "Waiting" message disappears, turn off the Game Boy that is receiving the bad Pokemon. When the "Trade completed" message appears, turn off the remaining Game Boy. Both games will have the same good Pokemon when they are turned back on.

Note: Do not attempt this trick with any saved games you wish to keep, as it can corrupt those files if done incorrectly.

Answer 2

My 11 year old son who has beat both of these games says that there is no way to clone Pokemon. Hope this helps.