It has come to my attention that Pokemondb doesn't know that Zoroark, at least in the USA and Canada, is an event Pokemon, the event starts January 3rd, and ends January 9th. You MUST attain a shiny Raikou and trade it to your Gen V. Black or White version. This will give you the chance to get your Zoroark or its pre-evolved form (I don't know which one.) Just don't ask me how to get them, because I have NO idea.