I'm trying to gather all of the Pokémon that can't be found in X or Y on other games, and the next one on my list is Porygon. For that reason, I'm trying to find a Porygon in White Forest. However, my Forest does not contain the correct trainer for this. My question is this - I own a copy of Black, but it is right at the beginning. Is it possible to access that copy's Black City without ever going there? Thanks for your help.
Strangely enough yes you can access Black City from your White 1 game if the other game has reached one of the circle cities such as Nimbasa, Driftveil, etc. What I mean by 'circle cities' are those cities shown on the town map that form a circle around the entralink. And you don't need to beat the E4 to gain access; my daughter accessed my Black City with her Black game when I reached Nimbasa City. As long as your White 1 game can access the entralink and has reached White Forest, you shouldn't have a problem.