Yes!! I finally figured out a way to clone!! Okay here's what you need:
~2 Soul Silver/Heart Gold, or 1 Soul Silver/1 Heart Gold
Here's how to clone:
~Transfer a pokemon to the Pokewalker
~When it says "Would you like to save" turn your DS off, you will have the pokemon on the Pokewalker
~You won't be able to put the cloned pokemon on the 1 DS cuz it will say something weird SOO put it on your other SS/HG source and trade it over!!
CONGRATS!! YOU JUST CLONED A POKEMON!! ENJOY THIS GLITCH!!