is it mystery gift? or how?
I have the PKMN Black American Version
It is an not a Mystery Gift, but you can obtain it by buying a copy of Pokemon Black and White on Target(the store). It will include a code for you to obtain the Lucario.
There may be an event some time to get a Lucario or something but not now. Right now you got 8 days left to get a DARKRAI for your pokemon black/white version. This will only go on till June 10th 2012. There was a Mewtwo event, but I got the memo too late :( Eh my friend hacked his game a bit and was able to make his mewtwo a lvl 100. It was soooo cool. Sorry off topic XD So yea if theres a Lucario event I wanna get it. (if you want Darkrai do the same thing with the mystery gifts and stuff :P