you can but,either you need an AR or just have some luck.
Chat with our AI personalities
they were in a event but the event has ended now.
i have a shiny entei im willing to trade, but what will you offer Any legendary Pokemon or starter Pokemon
If you have shiny Entei, Raikou or Suicune from Diamond, Pearl, Patimum, Heartgold or Soulsilve, trade it to Black and put it in your party and go to Lostlorn Forest.
To get zorua without celebi you can either get zoroark with shiny entei, raikou, or suicune or you can bargain with someone over wi-fi
i am fairly sure you can't.