If you don't have a way to use Relocator, you can use trading to acquire any of the following Event Pokémon: Celebi, Entei (Shiny), Suicine (Shiny), Raikou (Shiny). Celebi is used in Castelia City (make sure you have a free space in your party, you won't be fighting here), whereas any one of the other three legendaries would be used at Lostlorn Forest to initiate battle with a Lv.25 Zoroark disguising itself as the legendary you would be weak to.
If all else fails, one of my breeding projects is what I call SuperZoruas; it wouldn't be an Event one, but I can ship you a Lv.1 Zorua with Leer, Faint Attack, Foul Play, and Night Daze all learned. No hacking, I am simply a master breeder of them. :) Anything you can trade that I might not have?