How do you get zoroark in Pokemon?

Answer 1

You evolve it from Zorua who is from a Nintendo event.

~

WRONG. You don't just get it from evolving Zorua, nor is Zorua from an event! You get Zorua in Castelia City, after you find the scientist who made the Relocator machine. Once you have the Relocator you can transfer the Gamestop Celebi from Pokemon Pearl/Diam/Plat or HG/SS to Black or White. With Celebi in your party, when you go into one of the buildings it will trigger an event. Zorua pops out & the person who was fighting him lets you take him. You do not have to trade Celebi for it; you keep both.

To get Zoroark, you must have one of the 3 shiny "dog" event Pokemon, like the shiny Suicune that is being given out free over Nintendo WiFi as a gift. You must transfer either Suicune, Raikou or Entei (only the English shiny event ones work on the English version of the games) over to Black/White using the Relocator, once again. With one of them in your party, you will run into Zoroark for a battle in Lostlorn Forest, but because it's a shapeshifter Pokemon it will appear as either Suicune, Entei or Raikou (the one you run into depends on which one you have with you). Once you capture it, however, you will see that it's a Zoroark.

It's true that Zorua will evolve into Zoroark @ lvl.30, however, since you have the opportunity to get both under different circumstances, I would give Zorua an Everstone and keep it a Zorua. No point in having two Zoroarks, unless you want to, of course.

Japanese Pokemon will not trigger the events in the English version of the game; the Japanese event Pokemon only work on the Japanese version of Black/Whtie. The events can only be accessed ONCE.