You will not be able to get the password for the special Lucario because it has a unique password, which means that one password per Lucario. The codes for this were only available for some games purchased at Target.
Your only chance of getting this Lucario is by trading it with somebody that has already claimed it, or to find somebody SO NICE ENOUGH to give you their code for some reason, and I doubt anybody would give anybody else their own unique code.
"The password for this promotion came with specially marked copies of Pokémon Black and White available in participating American Target stores starting January 15. Copies with the password were limited." - Bulbapedia
These unique codes are very rare, so good luck finding one. (You can also try purchasing another Pokemon Black or White at Target now and hope that it has a code? Haha)
- 01.21.2012 9:44p